DEN → LAS Flight Reliability

Right now

Origin · DENNo disruption reported

Aviation weather is not currently a factor.

Updated 07:53 UTC

Denver airport profile →

Destination · LASNo disruption reported

Aviation weather is not currently a factor.

Updated 07:56 UTC

Las Vegas airport profile →

Route reliability

July 2023 – July 2026

Route Reliability Score

61/ 100Good

Better than 37% of comparable major US routes (4,598 compared)

Calculated from 24,397 flights. How this is calculated

On-time arrivals

74.3%

17,967 of 24,167

Cancellation rate

0.85%

208 cancelled

Median arrival delay

-4 min

Average 9.4 min

Severe delays

8.8%

60+ minutes late

Delay when late

62 min

Average, when 15+ min late

Flights analyzed

24,397

4 carriers

DEN → LAS arrives on time 74.3% of the time; the return trip, LAS → DEN, arrives on time 76.7% of the time, a 2.3-point gap between the two directions of the same city pair.

DEN → LAS spends 25.9 minutes on the ground on a 628-mile trip: 18.3 minutes from pushback to wheels-up at DEN and 7.6 minutes from touchdown to gate at LAS.

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

What stands out

This route has stayed remarkably steady year over year, a smaller swing than 98% of 5,368 comparable routes.

75.7% on time over the most recent 12 months (2025-08 to 2026-07), against 75.8% in the 12 months before (2024-08 to 2025-07), virtually unchanged.

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 5,368 in the comparison.

Why DEN → LAS flights are cancelled

July 2023 – July 2026

DEN → LAS cancelled 208 of 24,397 scheduled flights — about 1 in every 117. The reason filed most often was extreme weather, 44.7% of the cancellations coded on this route — about 1 in every 262 scheduled flights.

Share of cancellations

Weather44.7%

Airline42.8%

Air traffic12.5%

Security0.0%

Of 208 cancelled departures carrying a reason code.

What each reason means

Extreme weather1 in 262

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

93 cancellations, 44.7% of the total.

The airline1 in 274

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

89 cancellations, 42.8% of the total.

The air traffic system1 in 938

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

26 cancellations, 12.5% 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.

Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.

208 coded cancellations were recorded on DEN → LAS; the section appears from 50.

When it goes wrong

July 2023 – July 2026

One arrival in ten is worse than

54 min late

against a median of 4 min early

Arrived an hour or more late8.8%

Typical delay when late62 min

Cancelled0.85%

Landed somewhere else0.09%

Percentiles over 24,397 operations; cancelled and diverted flights are counted separately.

Will your connection be tight enough?

Layovers at LAS after arriving from DEN.

Connection buffer and chance of missing by layover length, DEN → LAS arrivals
Connection time	Chance of missing	Reads as
30 min	42%	Likely to miss
45 min	25%	High risk
60 min	16%	High risk
90 min	8.7%	Some risk
120 min	4.9%	Low risk

This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 0.85% of the time and diverts 0.09% of the time, which a late arrival never shows up in.

Chance of missing is the share of 24,167 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.

The worst tenth of arrivals on this route land at least 54 minutes late (90th-percentile gate arrival delay), over 24,397 operations.

Any other layover length: connection checker.

Best time to fly

DEN → LAS flights departing 5–9 AM arrived on time 90.7% of the time, against 65.2% for 6–9 PM departures, a gap of 25.5 percentage points.

By day and hour

On-time arrival rate for each weekday and scheduled departure hour, in local time at the departure airport (DEN).

Hour of departure matters more than day of the week: hourly averages sit a typical 10.1 points from the route-wide rate, weekday averages 4.2 points.

On-time arrival rate for DEN to LAS by weekday and scheduled departure hour, local time. Each button reads out one slot.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
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

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

50–59
60–69
70–79
80–89
90–99

Fewer than 120 flights, not scored

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.

No slot is named best or worst: too few reach 500 flights. Departures before 6 AM and after 11 PM (377 flights) are not drawn: no slot in those hours has enough flights to score.

View as tableHide table

On-time arrival rate (%) with flights beneath, by scheduled departure hour and weekday for DEN to LAS. A dash means fewer than 120 flights, which are not scored.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
6 AM–7 AM	94.0% on time204 flights	96.3% on time163 flights	95.9% on time171 flights	95.2% on time209 flights	93.2% on time220 flights	90.6% on time132 flights	91.8% on time196 flights
7 AM–8 AM	89.3% on time332 flights	90.4% on time253 flights	91.6% on time238 flights	88.7% on time312 flights	86.5% on time312 flights	83.7% on time241 flights	90.9% on time307 flights
8 AM–9 AM	92.5% on time147 flights	89.7% on time194 flights	87.8% on time197 flights	89.7% on time157 flights	89.5% on time152 flights	89.3% on time150 flights	85.0% on time181 flights
9 AM–10 AM	78.3% on time276 flights	83.0% on time242 flights	83.5% on time243 flights	81.2% on time279 flights	80.6% on time280 flights	84.2% on time184 flights	81.5% on time268 flights
10 AM–11 AM	76.1% on time182 flights	83.0% on time160 flights	83.8% on time149 flights	78.5% on time179 flights	75.9% on time171 flights	86.8% on time146 flights	85.0% on time168 flights
11 AM–12 PM	81.8% on time268 flights	82.6% on time254 flights	82.5% on time251 flights	75.4% on time281 flights	74.3% on time270 flights	82.9% on time206 flights	76.1% on time262 flights
12 PM–1 PM	113 flights, too few to score	70.7% on time135 flights	81.6% on time152 flights	110 flights, too few to score	118 flights, too few to score	92 flights, too few to score	71.9% on time129 flights
1 PM–2 PM	68.7% on time262 flights	82.8% on time228 flights	78.5% on time216 flights	63.8% on time254 flights	66.4% on time268 flights	80.8% on time214 flights	73.3% on time252 flights
2 PM–3 PM	65.9% on time135 flights	74.9% on time180 flights	75.3% on time184 flights	62.9% on time146 flights	57.0% on time130 flights	76.2% on time127 flights	59.7% on time162 flights
3 PM–4 PM	67.0% on time180 flights	71.8% on time207 flights	72.6% on time202 flights	62.4% on time168 flights	54.6% on time176 flights	73.0% on time152 flights	63.0% on time175 flights
4 PM–5 PM	65.5% on time236 flights	72.6% on time224 flights	77.6% on time238 flights	63.1% on time229 flights	57.3% on time245 flights	72.3% on time240 flights	68.2% on time237 flights
5 PM–6 PM	61.8% on time246 flights	71.3% on time171 flights	74.1% on time190 flights	52.9% on time245 flights	52.9% on time238 flights	79.2% on time146 flights	61.5% on time228 flights
6 PM–7 PM	56.5% on time149 flights	110 flights, too few to score	102 flights, too few to score	62.5% on time123 flights	61.6% on time141 flights	97 flights, too few to score	57.3% on time165 flights
7 PM–8 PM	65.9% on time340 flights	74.2% on time274 flights	76.8% on time273 flights	56.5% on time328 flights	61.9% on time344 flights	67.8% on time316 flights	64.7% on time343 flights
8 PM–9 PM	67.8% on time216 flights	73.4% on time178 flights	73.0% on time230 flights	58.5% on time238 flights	59.7% on time236 flights	58.9% on time147 flights	63.7% on time210 flights
9 PM–10 PM	63.4% on time153 flights	84 flights, too few to score	114 flights, too few to score	50.6% on time166 flights	61.6% on time156 flights	87 flights, too few to score	52.7% on time170 flights
10 PM–11 PM	72.7% on time207 flights	81.9% on time156 flights	85.3% on time156 flights	63.8% on time199 flights	62.1% on time217 flights	79.2% on time169 flights	70.8% on time259 flights

By departure window

5–9 AM90.7%

9 AM–12 PM80.5%

12–3 PM71.2%

3–6 PM66.0%

6–9 PM65.2%

9 PM–5 AM66.5%

By departure hour

12 AM

3 AM

6 AM

9 AM

12 PM

3 PM

6 PM

9 PM

Why DEN → LAS runs late

July 2023 – July 2026

Late-arriving aircraft48.1%

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 control21.9%

airspace and airport capacity, including weather-driven flow control

Weather2.7%

weather severe enough to stop this flight specifically

Security0.1%

screening or terminal security incidents

Share of the delay minutes US DOT attributed to each cause for DEN → LAS. Only delays of 15 minutes or more are attributed.

Late-arriving aircraft is the largest cause on DEN → LAS, at 48.1%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 90.7% of the time and 6–9 PM departures 65.2%.

How this route holds up in bad weather

July 2023 – July 2026

The harder-hit end is the one the flight leaves from, where a cancellation keeps it from departing at all. Bad weather cancels 4.0 times the normal rate at DEN against 2.4 times at LAS. Cancelled in bad weather against normal hours: DEN 2.8% against 0.7%, LAS 2.0% against 0.8%. Flights that did leave DEN in bad weather arrived on time 51.5% of the time, against 78.8% in normal hours.

Bad weather and normal hours at the airports

Scheduled departures, July 2023 – July 2026

Departures from DEN and LAS in hours of bad weather and in normal hours
Departures from	DEN	LAS
Cancelled in bad weather	2.8%	2.0%
Cancelled in normal hours	0.7%	0.8%
Arrived on time, bad weather	51.5%	58.5%
Arrived on time, normal hours	78.8%	78.5%
Departures in bad weather	92,610	14,522

United Airlines (1.5% cancelled against 3.5% for the other carriers at DEN) and Southwest Airlines (2.4% cancelled against 3.1% for the other carriers at DEN) cancelled fewer departures from DEN in bad weather than the other carriers there did in the same months. None of the route’s other carriers was clearly worse. One more carrier flies this route but has too few bad-weather departures from DEN to compare.

This route’s airlines in bad weather at DEN

All departures from DEN

Cancellation rates in bad weather at DEN for the airlines that fly DEN to LAS, against the other carriers at DEN in the same months
Airline	Bad-weather departures	Cancelled	Other carriers
United Airlines	30,853	1.5%below the others	3.5%
Southwest Airlines	28,467	2.4%below the others	3.1%
Frontier Airlines	6,740	3.1%about level	2.8%

These are airport figures, not route figures: every scheduled departure from DEN and LAS, to any destination, in hours the weather report called bad. The airline rows count each carrier’s departures from DEN on every route.

Weather source and limits. In full: DEN (airlines), LAS, What Weather Costs Each Airport, Who Cancels More When the Weather Turns, Airports That Change Places When Weather Turns.

Airlines on this route

Carriers with at least 200 flights, by the airline that operated each one.

Airlines on this route
Carrier	Flights	On time	Cancelled	Median delay	Severe
Southwest Airlines	10,918	72.5%	0.93%	-2 min	8.4%
United Airlines	7,737	77.4%	0.59%	-6 min	8.8%
Frontier Airlines	5,333	73.9%	0.99%	-6 min	9.6%
Spirit Airlines	409	71.6%	1.71%	-2 min	11.2%

Southwest Airlines flew 44.8% of the 24,397 flights listed. Spirit Airlines cancelled 1.71% of its flights here against 0.59% for United Airlines.

United Airlines arrived on time 5.8 percentage points more often than Spirit Airlines on this route.

Flights on this route

Flight numbers with at least 600 operations here and still on the schedule.

Flights on this route
Flight	Scheduled	Operations	On time
UA655 United Airlines	7:25 PM	1,102	70.6%
F91993 Frontier Airlines	10:00 AM	835	78.5%
UA2316 United Airlines	7:45 AM	772	90.8%
F92349 Frontier Airlines	1:20 PM	743	70.5%
F92015 Frontier Airlines	7:00 AM	711	85.5%
F9777 Frontier Airlines	10:29 PM	685	72.4%

UA2316 (7:45 AM) arrived on time 90.8% of the time, 20.3 points more often than F92349 (1:20 PM) at 70.5%.

Weekly and seasonal patterns

By day of week

Mon73.5%

Tue79.3%

Wed80.3%

Thu69.6%

Fri69.3%

Sat77.6%

Sun72.8%

Wednesday is historically the most reliable day and Friday the least, a gap of 11.0 percentage points.

By month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

July is historically the weakest month and November the strongest, a spread of 18.8 percentage points.

Reliability over time

July 2023 – July 2026

24

25

26

Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 75.7% against 75.8% in the 12 months before — broadly unchanged.

Data and methodology

Calculated by FlyerIntel from 24,397 DEN → LAS flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.

Full methodology · Data sources · Report a problem

Analysis last recomputed September 26, 2026

DEN airport LAS airport Return direction LAS → DEN

DEN→LAS

Right now

Route reliability

What stands out

Why DEN → LAS flights are cancelled

Share of cancellations

What each reason means

When it goes wrong

Will your connection be tight enough?

Best time to fly

By day and hour

By departure window

By departure hour

Why DEN → LAS runs late

How this route holds up in bad weather

Bad weather and normal hours at the airports

This route’s airlines in bad weather at DEN

Airlines on this route

Flights on this route

Weekly and seasonal patterns

By day of week

By month

Reliability over time

Data and methodology