Frontier Airlines Reliability

Reliability

July 2023 – July 2026

Airline Reliability Score

45/ 100Fair

Better than 10% of US reporting carriers (15 compared)

Calculated from 629,235 flights. How this is calculated

On-time arrivals

71.8%

441,316 of 614,961

Cancellation rate

2.09%

13,165 cancelled

Median arrival delay

-5 min

Average 14.9 min

Severe delays

11.5%

60+ minutes late

Delay when late

82 min

Average, when 15+ min late

Departure punctuality

72.5%

Left the gate on time

Against the 15 carriers FlyerIntel covers — all measured over the same period, from the same source — Frontier Airlines ranks 15th of 15 for on-time arrivals, 11th for cancellations and 14th for arrivals more than an hour late. The full table is at the foot of this page.

Over the most recent 12 months (2025-08 to 2026-07) Frontier Airlines arrived on time 73.1% of the time, against 72.1% in the 12 months before (2024-08 to 2025-07) — broadly unchanged.

Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026

Why Frontier Airlines cancels flights

Every cancellation carries a reason code the operating carrier filed with US DOT. July 2023 – July 2026.

Frontier Airlines cancelled 13,165 of 629,235 scheduled flights — about 1 in every 48. The reason it filed most often was extreme weather, 50.8% of the cancellations it coded — about 1 in every 94 scheduled flights.

Share of cancellations

Weather50.8%

Airline49.2%

Air traffic0.0%

Security0.0%

Of 13,165 cancelled departures carrying a reason code.

What each reason means

Extreme weather1 in 94

Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.

6,685 cancellations, 50.8% of the total.

The airline1 in 97

Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.

6,480 cancellations, 49.2% of the total.

The air traffic system—

Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.

0 cancellations, 0.0% of the total.

Security—

A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.

0 cancellations, 0.0% of the total.

What these shares do not measure

A reason code is the operating carrier’s own filing. US DOT collects the reason the airline gave; it does not adjudicate it, and carriers differ in how they fill the form in. The split above describes what kind of disruption Frontier Airlines records, not who was at fault when it happened, and it cannot be set against another airline’s split to decide which of the two is better run.

That is measurable rather than a disclaimer. Across the 15 carriers FlyerIntel publishes, the correlation between how much of its own canceling a carrier attributes to itself and how often it actually cancels is -0.46 — negative, which is the wrong sign for a ranking of fault and about the right sign for a difference in filing convention. Hawaiian Airlines attributed 82.8% of its cancellations to itself and cancelled 1.00% of its flights; SkyWest Airlines attributed 2.7% and cancelled 1.33%. The airline taking the most blame is the one that cancels least.

The figure on this page that does compare cleanly between airlines is the cancellation rate in Reliability, because it counts cancellations instead of reading the reason filed for them. The First Flight of the Day sets out the same finding from the airport-carrier records, and declines on the strength of it to compare any two carriers’ codes.

Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.

By airport

Frontier Airlines cancellation causes by airport
Airport	Cancelled	Rate	Airline	Weather	Air traffic	Security
ATL Atlanta	1,196	2.61%	50%	50%	0%	0%
MCO Orlando	1,007	1.75%	37%	63%	0%	0%
PHL Philadelphia	877	2.69%	47%	53%	0%	0%
DEN Denver	797	1.10%	43%	57%	0%	0%
DFW Dallas–Fort Worth	699	2.37%	48%	52%	0%	0%
LAS Las Vegas	577	1.45%	61%	39%	0%	0%

Shares are of Frontier Airlines’s own coded cancellations at each airport and run across the row, so they total 100%. “Rate” is cancellations as a share of its scheduled departures there. Reading down a column compares one airline with itself in different weather and different airspace, which is the comparison these codes support — a carrier files the same way wherever it flies, so its filing habits largely cancel out of the differences between these rows in a way they never cancel out of a comparison between two airlines. Airports where Frontier Airlines recorded fewer coded cancellations than the published minimum are not listed.

Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026 · These are the reason codes Frontier Airlines itself filed with US DOT — the reason the airline gave, not an independent finding of fault, and airlines differ in how they apply them. FlyerIntel publishes the split only for carriers with at least 500 coded cancellations in the period; 13,165 were recorded. Whatever the reason code, a cancelled flight may qualify for an automatic refund under DOT’s rule — the refund checker covers eligibility.

Reliability over time

24

25

26

Each column is one month of Frontier Airlines operations. The strongest single month of the period was February 2024 at 80.1% on time; the weakest was July 2023 at 56.2%. Individual months move for reasons that do not repeat — a hurricane season, a technology outage, a winter storm — which is why the section below combines the same data by calendar month instead.

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026

Best and worst months to fly

Every Frontier Airlines January stacked on every other January, and so on through the year.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Frontier Airlines — best and worst months to fly
Month	Flights	On time	Cancelled
January	45,287	73.0%	2.76%
February	44,653	77.7%	1.01%
March	56,289	71.2%	2.63%
April	53,072	72.7%	1.40%
May	53,106	70.6%	1.41%
June	53,808	65.8%	2.85%
July	71,134	62.9%	3.82%
August	50,914	67.9%	3.26%
September	48,740	76.1%	1.37%
October	52,006	76.0%	1.46%
November	50,510	77.7%	1.02%
December	49,716	74.0%	1.31%

Combining 3 to 4 years of operations by calendar month, Frontier Airlines is at its best in February, when 77.7% of arrivals were on time, and at its worst in July at 62.9% — a spread of 14.8 percentage points between two months of the same airline. Cancellations peak in the same month: July at 3.82% of flights, against 1.01% in February.

This is the shape of the calendar, not a forecast. It says that if you book Frontier Airlines in July you are booking into the part of the year when this airline has historically been least punctual, and that a February itinerary starts from a better position. It does not say anything about a particular date, and it cannot: the figure behind each month is 3 to 4 years of that same month combined, precisely so that one storm does not decide the answer.

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Rates are recalculated from the summed monthly counts, so a heavy month carries more weight than a light one.

Best time to fly Frontier Airlines

How Frontier Airlines departures have done at each hour of each weekday, across its whole network.

By day and hour

On-time arrival rate for each weekday and scheduled departure hour, in local time at the airport each flight leaves from, so the grid mixes time zones across the network.

Thursday 5–6 AM was the most reliable slot for Frontier Airlines (87.3% on time, 3,687 flights) and Sunday 10–11 PM the least (57.4%, 5,909 flights).

Hour of departure matters more than day of the week: hourly averages sit a typical 7.8 points from the network-wide rate, weekday averages 2.4 points.

On-time arrival rate for Frontier Airlines by weekday and scheduled departure hour, local time. Each button reads out one slot.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
12 AM–1 AM
1 AM–2 AM
2 AM–3 AM
3 AM–4 AM
4 AM–5 AM
5 AM–6 AM
6 AM–7 AM
7 AM–8 AM
8 AM–9 AM
9 AM–10 AM
10 AM–11 AM
11 AM–12 PM
12 PM–1 PM
1 PM–2 PM
2 PM–3 PM
3 PM–4 PM
4 PM–5 PM
5 PM–6 PM
6 PM–7 PM
7 PM–8 PM
8 PM–9 PM
9 PM–10 PM
10 PM–11 PM
11 PM–12 AM

On-time rate, % · stronger color, fewer on time

55–59
60–64
65–69
70–74
75–79
80–84
85–89

Fewer than 120 flights, not scored
Most reliable slot
Least reliable slot

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · On time is arrival within 15 minutes of schedule. Cells round to whole percentages; the table shows one decimal.

Best and worst slots are named only among slots with 500+ flights, and only when the gap is larger than sampling error.

View as tableHide table

On-time arrival rate (%) with flights beneath, by scheduled departure hour and weekday for Frontier Airlines. A dash means fewer than 120 flights, which are not scored.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
12 AM–1 AM	62.8% on time927 flights	60.8% on time866 flights	76.3% on time831 flights	76.5% on time858 flights	66.1% on time935 flights	65.1% on time910 flights	72.7% on time881 flights
1 AM–2 AM	41 flights, too few to score	45 flights, too few to score	37 flights, too few to score	44 flights, too few to score	50 flights, too few to score	47 flights, too few to score	51 flights, too few to score
2 AM–3 AM	92 flights, too few to score	85 flights, too few to score	85 flights, too few to score	99 flights, too few to score	101 flights, too few to score	86 flights, too few to score	104 flights, too few to score
3 AM–4 AM	75.4% on time203 flights	69.3% on time191 flights	80.9% on time175 flights	86.9% on time179 flights	79.6% on time192 flights	77.7% on time206 flights	76.9% on time188 flights
4 AM–5 AM	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score
5 AM–6 AM	84.2% on time3,741 flights	85.6% on time2,030 flights	86.6% on time2,217 flights	87.3% on time3,687 flights	85.6% on time3,919 flights	83.5% on time2,888 flights	83.9% on time4,009 flights
6 AM–7 AM	83.3% on time8,819 flights	84.2% on time5,256 flights	85.3% on time5,306 flights	85.6% on time8,522 flights	84.7% on time8,979 flights	82.4% on time6,527 flights	83.8% on time8,745 flights
7 AM–8 AM	81.2% on time4,974 flights	82.6% on time3,492 flights	85.0% on time3,430 flights	82.7% on time4,826 flights	83.0% on time4,940 flights	82.3% on time3,996 flights	81.9% on time5,042 flights
8 AM–9 AM	77.9% on time5,167 flights	82.2% on time3,697 flights	82.3% on time3,844 flights	81.1% on time4,887 flights	82.0% on time5,269 flights	80.1% on time4,628 flights	78.4% on time5,277 flights
9 AM–10 AM	76.5% on time5,566 flights	79.8% on time3,700 flights	82.4% on time3,596 flights	79.7% on time5,438 flights	78.7% on time5,632 flights	78.1% on time4,228 flights	77.0% on time5,624 flights
10 AM–11 AM	74.1% on time5,440 flights	79.0% on time3,367 flights	80.0% on time3,431 flights	78.1% on time5,088 flights	76.0% on time5,647 flights	75.7% on time4,281 flights	74.1% on time5,372 flights
11 AM–12 PM	72.7% on time5,447 flights	77.2% on time3,975 flights	78.9% on time3,962 flights	75.1% on time5,400 flights	75.1% on time5,374 flights	76.3% on time4,526 flights	74.3% on time5,501 flights
12 PM–1 PM	72.1% on time5,777 flights	77.2% on time3,690 flights	78.7% on time3,833 flights	75.0% on time5,494 flights	73.6% on time5,912 flights	76.3% on time4,418 flights	70.6% on time5,799 flights
1 PM–2 PM	69.7% on time5,163 flights	75.2% on time3,679 flights	75.5% on time3,644 flights	72.8% on time4,977 flights	71.0% on time5,128 flights	72.9% on time4,202 flights	68.9% on time5,131 flights
2 PM–3 PM	66.4% on time5,239 flights	73.5% on time3,437 flights	72.4% on time3,556 flights	70.9% on time5,033 flights	69.3% on time5,380 flights	73.0% on time4,244 flights	66.6% on time5,325 flights
3 PM–4 PM	64.4% on time5,869 flights	72.5% on time3,673 flights	71.9% on time3,765 flights	69.0% on time5,837 flights	66.9% on time5,874 flights	70.4% on time4,614 flights	63.6% on time6,046 flights
4 PM–5 PM	61.5% on time6,179 flights	70.2% on time3,961 flights	69.1% on time3,875 flights	65.3% on time6,087 flights	65.7% on time6,180 flights	67.4% on time4,981 flights	61.8% on time6,271 flights
5 PM–6 PM	61.5% on time5,686 flights	67.2% on time3,559 flights	68.1% on time3,484 flights	64.6% on time5,436 flights	64.1% on time5,805 flights	66.5% on time4,552 flights	58.3% on time5,693 flights
6 PM–7 PM	59.0% on time5,525 flights	68.0% on time3,394 flights	67.7% on time3,490 flights	62.5% on time5,280 flights	61.7% on time5,589 flights	65.6% on time4,364 flights	58.5% on time5,574 flights
7 PM–8 PM	59.3% on time5,310 flights	68.8% on time3,374 flights	67.8% on time3,353 flights	62.2% on time5,265 flights	62.5% on time5,353 flights	64.5% on time4,286 flights	58.0% on time5,617 flights
8 PM–9 PM	60.6% on time5,530 flights	68.3% on time3,470 flights	69.1% on time3,480 flights	64.3% on time5,269 flights	63.5% on time5,646 flights	67.9% on time4,357 flights	59.1% on time5,453 flights
9 PM–10 PM	60.2% on time5,186 flights	69.6% on time3,058 flights	68.1% on time3,110 flights	63.5% on time4,886 flights	64.1% on time5,259 flights	66.5% on time4,384 flights	59.0% on time5,240 flights
10 PM–11 PM	58.3% on time5,679 flights	68.5% on time3,423 flights	69.6% on time3,437 flights	61.1% on time5,364 flights	62.4% on time5,927 flights	65.2% on time4,032 flights	57.4% on time5,909 flights
11 PM–12 AM	62.8% on time1,667 flights	72.7% on time1,433 flights	74.6% on time1,496 flights	64.3% on time1,851 flights	65.0% on time1,764 flights	70.6% on time1,620 flights	61.3% on time1,825 flights

Why Frontier Airlines runs late

Share of total reported delay minutes by cause, as classified by the operating carrier.

Late-arriving aircraft52.3%

the inbound aircraft was late, so this flight started late

The airline27.2%

crew, maintenance, boarding and fueling, all within the carrier’s control

Air traffic control18.0%

airspace and airport capacity, including weather-driven flow control

Weather2.5%

weather severe enough to stop this flight specifically

Share of the delay minutes US DOT attributed to each cause for Frontier Airlines. Only delays of 15 minutes or more are attributed.

The largest single category for Frontier Airlines is late-arriving aircraft, at 52.3% of attributed minutes. The category squarely inside the carrier’s own control — crew, maintenance, boarding, fueling — accounts for 27.2% of its delay minutes, against 33.9% across the 15 carriers covered here. That is 6.7 percentage points less of its delay minutes falling inside the airline than is typical for this group.

These shares describe how delay minutes were divided, not how often delays happened. A carrier with an unusually large air-traffic-control share is not necessarily worse run; it may simply fly more of its schedule through congested airspace. The one category that is squarely the airline’s own is the carrier category, which is why it is the one compared above.

Source: US DOT BTS delay cause categories · July 2023 – July 2026 · Cause minutes are only reported for arrivals delayed 15 minutes or more.

How Frontier Airlines handles bad weather

Departures by the weather at the origin in the hour they were scheduled to leave, July 2023 – July 2026.

8% of Frontier Airlines’ weather-matched departures left in an hour of bad weather at the origin. 4.6% of them were cancelled, 2.5 times the 1.8% cancelled in normal hours, and 58.5% of those that flew arrived on time, against 72.8%. Those hours held 17% of the airline’s cancelled departures.

In bad weather Frontier Airlines cancelled about as many flights as the other carriers: 4.6% of its departures in those hours were cancelled, against 4.3% for the other carriers at the same airports in the same months. In normal hours it was above them (1.8% against 1.1%). Its flights that operated arrived on time 58.3% of the time, 4.8 points below the others’ 63.1%.

Bad-weather hours against normal hours

Scheduled departures, July 2023 – July 2026

Frontier Airlines cancellation and on-time rates in bad-weather and normal hours at the origin, with the other carriers at the same airports and months
Weather at the origin	Departures	Cancelled	Arrived on time
Normal hours	495,352	1.8%	72.8%
Other carriers	495,352compared	1.1%	79.1%
Bad-weather hours	45,8738% of all matched	4.6%2.5 times normal	58.5%14.3 points below normal
Other carriers	45,046compared	4.3%	63.1%

Bad weather means IFR or LIFR conditions, or a storm, snow, ice, fog, heavy rain or high wind, at the origin; normal means VFR with none of those. Marginal hours are in neither row, and were 7% of Frontier Airlines’ matched departures. Cancelled is the share of scheduled departures. The other carriers’ rows apply their rate in each airport and month to the departures Frontier Airlines had there.

The most exposed airports were LGA (10.6% of 864), BWI (6.8% of 946), CLT (6.7% of 812); the least, SFO (1.8% of 1,057), SLC (2.3% of 525), DTW (2.5% of 1,150). The widest gap above the other carriers was at LAS, Las Vegas: 4.0% cancelled against 1.8%. The widest below them was at DFW, Dallas–Fort Worth: 5.9% cancelled against 10.5%.

Most exposed airports

Most exposed airports: Frontier Airlines departures in bad weather by airport
Airport	Departures	Cancelled	Other carriers	Normal hours
LGA New York	864	10.6%	8.7%	3.8%
BWI Baltimore	946	6.8%	5.2%	2.7%
CLT Charlotte	812	6.7%	6.0%	3.1%

Least exposed airports

Least exposed airports: Frontier Airlines departures in bad weather by airport
Airport	Departures	Cancelled	Other carriers	Normal hours
SFO San Francisco	1,057	1.8%	1.5%	2.0%
SLC Salt Lake City	525	2.3%	0.6%	1.6%
DTW Detroit	1,150	2.5%	2.8%	2.1%

Airports are listed with at least 500 of Frontier Airlines’ bad-weather departures and 500 weather-matched departures in all. Other carriers is their cancellation rate in the same airport and months, applied to Frontier Airlines’ departures there, and is left blank where Frontier Airlines was nearly the only carrier flying in the bad-weather hours of most months and there is no one to compare with.

This is the weather reported at the origin in the hour a flight was scheduled to leave, July 2023 – July 2026. It leaves out the weather at the destination and on the way, and an hour takes the worst conditions any report in it gave. Weather was matched to 92.5% of Frontier Airlines’ scheduled departures: the rest left from airports with no archived weather, in hours with no report, or at a scheduled time the flight records cannot place exactly. The comparison covers 1,548 airport-months in which Frontier Airlines flew in bad weather; the other carriers are held to the same airport and calendar month, not the same hour of the day or the same aircraft, so a carrier that schedules more of those departures at the busiest or the quietest times is not fully adjusted for. 827 of its bad-weather departures were in an airport and month where the other carriers had fewer than 120 of their own, and are not in that comparison.

Source: FlyerIntel analysis of US DOT BTS flight records and Iowa Environmental Mesonet weather reports · July 2023 – July 2026 · Where the weather comes from, and its limits. All covered airports side by side: What Weather Costs Each Airport.

Turning aircraft around at Frontier Airlines

Time on the ground between one flight and the next of the same aircraft, and what a late arrival does to the next departure, July 2023 – July 2026.

The median Frontier Airlines turn is scheduled for 60 minutes on the ground and takes 67 minutes, against 56 minutes and 63 minutes across all airlines. Frontier Airlines gives its aircraft longer on the ground than the network does. 25.9% of its turns began with an aircraft that landed 15 or more minutes late, against 18.9% for the network.

When the aircraft landed 15 or more minutes late (126,161 turns, 65 minutes late on average), 64% of the turns were finished in no more than the scheduled ground time, against 68% across all airlines. 75% of those flights left 15 or more minutes late, against 72%. After an aircraft that landed on time, 12% did (network 11%).

Given the turn lengths it schedules, the network’s rates would give 72% finished in the schedule and 68% leaving late. By that measure Frontier Airlines finished fewer late turns in the schedule and passed lateness on to the next departure more often than the network would have. 40% of its late-inbound turns had a scheduled turn of 45 to 59 minutes, against 31% of the network’s.

Turns, Frontier Airlines against the network

488,029 turns, July 2023 – July 2026

Frontier Airlines aircraft turns against all airlines: scheduled and actual time on the ground and what a late inbound aircraft does
Measure	Frontier Airlines	All airlines	All airlines, same turn lengths
Median scheduled turn	60 min	56 min	—
Median actual turn	67 min	63 min	—
Turns that began with an aircraft 15+ minutes late	26%	19%	—
Late turns finished within the schedule	64%	68%	72%
Late inbound that left 15+ minutes late	75%	72%	68%
On-time inbound that left 15+ minutes late	12%	11%	—

Late means 15 or more minutes. A turn finishes within the schedule when the aircraft spent no more time on the ground than the schedule gave it. The last column applies the network’s rate in each scheduled-turn band (under 30 minutes up to 3 to 6 hours) to the number of Frontier Airlines turns in that band, so it shows what the same turn lengths would give across all airlines.

A turn pairs an aircraft’s landing with its next departure by tail number; the aircraft is never named. These 488,029 turns are 78% of Frontier Airlines’ flights in the period; the rest are an aircraft’s first flight after a long stay, flights without a usable inbound, and cancelled flights. Ground time is measured from the gate: the scheduled turn plus the departing flight’s delay minus the inbound’s arrival delay. Overnight stays (6 hours or more on the ground), cancelled flights and flights whose inbound diverted are not turns here. Turns scheduled under 30 minutes are a small share and are kept, but they are rarely a plan for that aircraft (more often a swap or recovery, with the flight waiting for an aircraft that was not the one scheduled), so most of them across the network leave late even after an on-time landing. A flight that an airline covered with a different aircraft is linked to the one that flew it, not the one first planned.

Source: FlyerIntel analysis of US DOT BTS flight records · July 2023 – July 2026 · All airlines side by side: How Fast an Aircraft Turns When It Has To.

What sets Frontier Airlines apart

Where Frontier Airlines differs most from the other covered airlines, July 2023 – July 2026.

12 AM is where Frontier Airlines falls furthest behind the other airlines: 68.5% of its 12 AM departures arrive on time, 15.7 points below the 84.2% for that hour elsewhere.

Frontier Airlines’ weakest month against the field is August, 67.9% on time to 77.7% for the other airlines, 9.8 points short.

DCA is where Frontier Airlines stands out most against local competition: 79.9% of its departures arrive on time, 3.4 points above the 76.5% of the other airlines out of the same airport.

Out of ATL, Frontier Airlines arrives on time 63.4% of the time, 16.1 points below the 79.5% the other airlines there manage.

Frontier Airlines against the other airlines

July 2023 – July 2026

Where Frontier Airlines differs most from the other covered airlines, with the flights behind each figure
Measure	Frontier Airlines	Elsewhere	Gap	Flights behind it
Hour: 12 AM departures	68.5%	84.2%	−15.7 pts	6,076 here, 28,604 elsewhere
Month: August	67.9%	77.7%	−9.8 pts	49,148 here, 1,741,026 elsewhere
Airport: DCA	79.9%	76.5%	+3.4 pts	3,190 here, 417,940 elsewhere
Airport: ATL	63.4%	79.5%	−16.1 pts	44,599 here, 951,795 elsewhere

“Elsewhere” is every other covered airline together, from the same aggregates as this page. Hours and months appear only where both sides have at least 120 completed flights; airports only where Frontier Airlines and everyone else there each have at least 500. Gaps must be at least 2 points and 2 standard errors, and only the largest in each direction is shown. Airlines fly different airports, so the hour and month rows partly compare different traffic; the airport rows compare like with like. The taxi figure is weighted by departures, mixes airports, and has no error estimate, so it appears from 2 minutes.

Where this airline flies

Departure performance at the airports FlyerIntel covers.

Airports served

97

56 of them covered in detail here

Departures from its largest base

11.5%

DEN · Denver

Departures from its top three

28.0%

DEN, MCO, ATL

Frontier Airlines departed from 97 airports in this period, with no single one accounting for more than 11.5% of departures and the largest three together 28.0%. Performance is spread across the network rather than resting on one or two hubs, so a single weak airport moves this carrier’s overall figure less than it would at a hub-and-spoke airline.

Where this airline flies
Airport	Departures	On time	Cancelled	Median delay
DEN Denver	72,518	75.0%	1.10%	-6 min
MCO Orlando	57,629	74.9%	1.75%	-6 min
ATL Atlanta	45,876	63.4%	2.61%	2 min
LAS Las Vegas	39,672	75.3%	1.45%	-7 min
PHL Philadelphia	32,589	69.0%	2.69%	-4 min
DFW Dallas–Fort Worth	29,458	70.6%	2.37%	-3 min
PHX Phoenix	26,183	78.3%	1.10%	-7 min
TPA Tampa	21,223	75.0%	2.34%	-7 min
CLE Cleveland	19,901	72.3%	2.27%	-5 min
SJU San Juan	16,732	68.7%	2.16%	-2 min
RDU Raleigh–Durham	13,569	71.6%	2.82%	-5 min
SFO San Francisco	12,534	63.4%	2.00%	2 min

Strongest airports

DCA (79.9%), PHX (78.3%), SAT (76.9%)

Weakest airports

ATL (63.4%), SFO (63.4%), LGA (63.9%)

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Airports where this carrier flew fewer than 500 departures are not listed.

Route performance

Frontier Airlines’ own on-time rate on each route — this carrier's flights only, which can differ from the route's rate across every airline that flies it.

Most reliable

SLC→LAXSalt Lake City to Los Angeles88.3%PHX→LAXPhoenix to Los Angeles85.8%PHX→SLCPhoenix to Salt Lake City84.5%MCO→BOSOrlando to Boston84.4%LAX→SLCLos Angeles to Salt Lake City84.2%PHX→SNAPhoenix to Santa Ana84.1%DEN→SNADenver to Santa Ana83.2%LAS→SLCLas Vegas to Salt Lake City83.2%

Least reliable

LAX→ATLLos Angeles to Atlanta50.3%SAN→SFOSan Diego to San Francisco50.7%LAX→SFOLos Angeles to San Francisco54.3%RDU→LGARaleigh–Durham to New York54.5%ATL→EWRAtlanta to Newark55.7%SFO→SANSan Francisco to San Diego56.3%CLT→LGACharlotte to New York56.7%SFO→DFWSan Francisco to Dallas–Fort Worth57.7%

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Routes with fewer than 600 flights by this carrier are not ranked.

Where Frontier Airlines flies best and worst

The airports and routes where Frontier Airlines is on time most and least often, set beside the other airlines at the same place.

Frontier Airlines arrives on time 79.9% of the time at DCA, 3.4 points better than the 76.5% for the other airlines there.

Frontier Airlines posts 78.3% at PHX, one of its best, yet the other airlines there reach 80.4%, 2.1 points more.

Frontier Airlines posts 76.9% at SAT, one of its best, yet the other airlines there reach 82.4%, 5.5 points more.

Frontier Airlines manages 63.4% at ATL, 16.1 points below the 79.5% for the other airlines there.

Frontier Airlines manages 63.4% at SFO, 15.8 points below the 79.2% for the other airlines there.

Frontier Airlines manages 63.9% at LGA, 14.6 points below the 78.5% for the other airlines there.

Frontier Airlines arrives on time 88.3% of the time on SLC to LAX, 3.5 points better than the 84.8% for the other airlines on it.

Frontier Airlines arrives on time 85.8% of the time on PHX to LAX, 2.9 points better than the 82.9% for the other airlines on it.

PHX to SLC is a strong route for Frontier Airlines at 84.5%, but the other airlines on it do about as well at 84.5%, so the route is easy rather than the airline special.

Frontier Airlines manages 50.3% on LAX to ATL, 30 points below the 80.3% for the other airlines on it.

Frontier Airlines manages 50.7% on SAN to SFO, 16.5 points below the 67.2% for the other airlines on it.

Frontier Airlines manages 54.3% on LAX to SFO, 15.5 points below the 69.8% for the other airlines on it.

Airports, best and worst

Airports, best and worst: Frontier Airlines on-time rate beside the other airlines, with the flights behind each figure
Place	Frontier Airlines	Other airlines	Flights behind it
DCA	79.9%	76.5%	3,190 here, 417,940 others
PHX	78.3%	80.4%	25,847 here, 567,123 others
SAT	76.9%	82.4%	2,399 here, 123,069 others
ATL	63.4%	79.5%	44,599 here, 951,795 others
SFO	63.4%	79.2%	12,273 here, 417,972 others
LGA	63.9%	78.5%	6,742 here, 433,303 others

Routes, best and worst

Routes, best and worst: Frontier Airlines on-time rate beside the other airlines, with the flights behind each figure
Place	Frontier Airlines	Other airlines	Flights behind it
SLC to LAX	88.3%	84.8%	643 here, 12,595 others
PHX to LAX	85.8%	82.9%	1,167 here, 21,236 others
PHX to SLC	84.5%	84.5%	1,994 here, 15,688 others
LAX to ATL	50.3%	80.3%	882 here, 15,206 others
SAN to SFO	50.7%	67.2%	689 here, 19,052 others
LAX to SFO	54.3%	69.8%	1,010 here, 33,533 others

July 2023 – July 2026. Airports need at least 2,000 completed flights by Frontier Airlines, routes 600. The other airlines are everyone else at the same airport or on the same route, compared only where they have at least 500 (airports) or 200 (routes) completed flights; a gap counts as ahead or behind only at 2 points and 2 standard errors. Route figures are for one direction. Airlines fly different times of day and aircraft, so a gap is a comparison, not a cause.

Most and least reliable flights

Individual Frontier Airlines flight numbers, ranked on the route each one flies today.

Most reliable

F9686DEN→DCA · 6:40 AM91.5%F91440PHX→SLC · 6:40 AM90.5%F91376PHX→DEN · 6:00 AM88.4%F91915MCO→CLE · 5:05 AM88.2%F91542MCO→PHL · 5:01 AM87.4%F93274MCO→BWI · 5:05 AM86.9%F9685DCA→DEN · 7:00 AM86.6%F92341DEN→LAX · 6:00 AM86.5%

Least reliable

F93216LAX→ATL · 10:35 PM45.9%F94602ATL→EWR · 10:40 PM48.7%F93442ATL→MIA · 10:50 PM53.9%F94462PHL→SJU · 11:59 PM54.2%F91165SJU→PHL · 9:22 PM54.9%F94401LAS→SFO · 7:33 PM54.9%F91015SJU→PHL · 12:59 AM54.9%F93054ATL→TPA · 10:50 PM56.5%

165 Frontier Airlines flight numbers have operated their current route at least 600 times. The strongest of them, F9686 from Denver to Washington, arrived on time 91.5% of the time. The weakest, F93216 from Los Angeles to Atlanta, managed 45.9% — a gap of 46 percentage points inside one airline. The departures in the first column are scheduled to leave at a median of 6:00 AM; those in the second at 10:40 PM.

Choosing between two flights on the same airline and the same day is a decision most travelers make on price and timing alone, because nothing at the point of booking distinguishes them. These figures do. They are the record of the exact flight number, on the route it flies today, over the whole analysis period — not a carrier average applied to it.

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · A flight number is a slot in a schedule and gets reassigned to different city pairs over time, so each is measured only on the route it currently operates. Numbers with fewer than 600 operations on that route, or last flown more than a quarter ago, are not ranked. Schedules change — confirm a departure still operates before booking around it.

See all 165 Frontier Airlines flight numbers →

Compare airlines

Every carrier on FlyerIntel is measured the same way, over the same period, using the same source data. That is the whole point of the table: airline marketing reports punctuality on definitions of its own choosing, and this does not.

Compare airlines
Airline	Score	On time	Cancelled	60+ min late	Flights
Endeavor Air	70	85.1%	2.30%	6.0%	304,230
Hawaiian Airlines	80	83.7%	1.00%	2.9%	199,679
Republic Airways	61	82.3%	3.26%	6.7%	1,004,281
Delta Air Lines	71	82.1%	1.16%	6.3%	3,146,502
SkyWest Airlines	64	80.4%	1.33%	7.9%	2,433,643
Envoy Air	66	80.1%	1.80%	6.6%	886,878
United Airlines	66	79.7%	1.21%	7.5%	2,418,979
Alaska Airlines	71	78.9%	1.28%	5.0%	813,732
Southwest Airlines	71	78.2%	0.86%	6.0%	4,371,639
PSA Airlines	44	75.8%	3.43%	10.4%	717,562
Allegiant Air	58	75.7%	0.94%	9.5%	381,495
Spirit Airlines	54	75.5%	2.06%	9.6%	635,598
American Airlines	52	74.8%	1.76%	10.0%	3,019,376
JetBlue	45	72.5%	2.19%	11.7%	745,492
Frontier Airlines	45	71.8%	2.09%	11.5%	629,235

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Score is the FlyerIntel Airline Reliability Score. See all airlines ranked →

Data and methodology

Calculated by FlyerIntel from 629,235 Frontier Airlines flight records published by the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately, because folding them in would flatter a carrier that cancels rather than runs late. Figures below a published sample threshold are omitted rather than shown with a caveat.

Full methodology · Data sources · Report a problem

Analysis last recomputed September 26, 2026

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Frontier Airlines on-time performance, from FlyerIntel

Updates on its own as new data comes in — paste this once, nothing to maintain.

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