LAS → DEN Flight Reliability

Right now

Origin · LASNo disruption reported

Aviation weather is not currently a factor.

Updated 07:56 UTC

Las Vegas airport profile →

Destination · DENNo disruption reported

Aviation weather is not currently a factor.

Updated 07:53 UTC

Denver airport profile →

Route reliability

July 2023 – July 2026

Route Reliability Score

63/ 100Good

Better than 44% of comparable major US routes (4,598 compared)

Calculated from 24,379 flights. How this is calculated

On-time arrivals

76.7%

18,460 of 24,076

Cancellation rate

1.05%

257 cancelled

Median arrival delay

-6 min

Average 7.8 min

Severe delays

8.4%

60+ minutes late

Delay when late

66 min

Average, when 15+ min late

Flights analyzed

24,379

4 carriers

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

LAS → DEN spends 28.7 minutes on the ground on a 628-mile trip: 19.2 minutes from pushback to wheels-up at LAS and 9.6 minutes from touchdown to gate at DEN.

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

Why LAS → DEN flights are cancelled

July 2023 – July 2026

LAS → DEN cancelled 257 of 24,379 scheduled flights — about 1 in every 95. The reason filed most often was the airline, 47.9% of the cancellations coded on this route — about 1 in every 198 scheduled flights.

Share of cancellations

Airline47.9%

Weather38.5%

Air traffic13.6%

Security0.0%

Of 257 cancelled departures carrying a reason code.

What each reason means

The airline1 in 198

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

123 cancellations, 47.9% of the total.

Extreme weather1 in 246

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

99 cancellations, 38.5% of the total.

The air traffic system1 in 697

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

35 cancellations, 13.6% 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.

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

When it goes wrong

July 2023 – July 2026

One arrival in ten is worse than

50 min late

against a median of 6 min early

Arrived an hour or more late8.4%

Typical delay when late66 min

Cancelled1.05%

Landed somewhere else0.19%

Percentiles over 24,379 operations; cancelled and diverted flights are counted separately.

Will your connection be tight enough?

Layovers at DEN after arriving from LAS.

Connection buffer and chance of missing by layover length, LAS → DEN arrivals
Connection time	Chance of missing	Reads as
30 min	37%	Likely to miss
45 min	23%	High risk
60 min	15%	High risk
90 min	8.2%	Some risk
120 min	4.7%	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 1.05% of the time and diverts 0.19% of the time, which a late arrival never shows up in.

Chance of missing is the share of 24,076 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 50 minutes late (90th-percentile gate arrival delay), over 24,379 operations.

Any other layover length: connection checker.

Best time to fly

LAS → DEN flights departing 5–9 AM arrived on time 89.7% of the time, against 64.7% for 3–6 PM departures, a gap of 25.0 percentage points.

By day and hour

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

Hour of departure matters more than day of the week: hourly averages sit a typical 10.6 points from the route-wide rate, weekday averages 3.8 points.

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

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

40–49
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 5 AM and after 10 PM (1,170 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 LAS to DEN. A dash means fewer than 120 flights, which are not scored.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
5 AM–6 AM	94.5% on time166 flights	107 flights, too few to score	106 flights, too few to score	98.2% on time168 flights	97.7% on time173 flights	93.9% on time167 flights	95.4% on time197 flights
6 AM–7 AM	86.1% on time359 flights	90.0% on time306 flights	94.1% on time306 flights	91.7% on time351 flights	90.4% on time359 flights	93.9% on time282 flights	89.5% on time356 flights
7 AM–8 AM	79.5% on time200 flights	86.4% on time194 flights	87.2% on time189 flights	87.2% on time214 flights	90.6% on time193 flights	84.6% on time162 flights	87.2% on time204 flights
8 AM–9 AM	84.6% on time208 flights	87.2% on time150 flights	90.0% on time170 flights	89.1% on time202 flights	84.6% on time222 flights	85.8% on time122 flights	84.2% on time185 flights
9 AM–10 AM	85.9% on time332 flights	87.2% on time278 flights	86.5% on time267 flights	87.0% on time317 flights	86.6% on time322 flights	87.6% on time276 flights	87.4% on time334 flights
10 AM–11 AM	99 flights, too few to score	108 flights, too few to score	111 flights, too few to score	107 flights, too few to score	97 flights, too few to score	84 flights, too few to score	89 flights, too few to score
11 AM–12 PM	81.6% on time227 flights	85.5% on time237 flights	85.4% on time234 flights	79.6% on time217 flights	81.5% on time218 flights	86.3% on time241 flights	78.8% on time245 flights
12 PM–1 PM	70.7% on time124 flights	84.1% on time146 flights	81.6% on time142 flights	67.6% on time139 flights	75.4% on time128 flights	88 flights, too few to score	70.3% on time158 flights
1 PM–2 PM	70.1% on time246 flights	68.6% on time283 flights	75.3% on time294 flights	70.4% on time251 flights	64.1% on time251 flights	78.8% on time281 flights	72.5% on time272 flights
2 PM–3 PM	60.7% on time175 flights	66.7% on time172 flights	59.6% on time172 flights	56.6% on time162 flights	62.0% on time166 flights	71.0% on time155 flights	59.3% on time120 flights
3 PM–4 PM	54.9% on time287 flights	73.7% on time200 flights	70.5% on time227 flights	55.8% on time253 flights	47.6% on time294 flights	71.3% on time150 flights	61.8% on time282 flights
4 PM–5 PM	63.0% on time287 flights	77.7% on time299 flights	78.7% on time280 flights	59.3% on time311 flights	66.9% on time278 flights	77.1% on time285 flights	63.9% on time302 flights
5 PM–6 PM	117 flights, too few to score	86 flights, too few to score	97 flights, too few to score	57.5% on time121 flights	119 flights, too few to score	75 flights, too few to score	55.4% on time130 flights
6 PM–7 PM	66.8% on time203 flights	75.8% on time150 flights	77.3% on time205 flights	67.3% on time206 flights	60.5% on time223 flights	77.7% on time150 flights	61.0% on time180 flights
7 PM–8 PM	69.9% on time193 flights	86.9% on time146 flights	86.6% on time181 flights	65.9% on time178 flights	61.7% on time180 flights	113 flights, too few to score	64.4% on time181 flights
8 PM–9 PM	69.1% on time163 flights	79.5% on time134 flights	78.7% on time122 flights	61.5% on time164 flights	60.0% on time173 flights	66 flights, too few to score	66.4% on time141 flights
9 PM–10 PM	67.6% on time149 flights	94 flights, too few to score	79 flights, too few to score	62.7% on time154 flights	61.6% on time153 flights	78 flights, too few to score	53.9% on time187 flights

By departure window

5–9 AM89.7%

9 AM–12 PM84.5%

12–3 PM70.0%

3–6 PM64.7%

6–9 PM70.2%

9 PM–5 AM71.1%

By departure hour

12 AM

3 AM

6 AM

9 AM

12 PM

3 PM

6 PM

9 PM

Why LAS → DEN runs late

July 2023 – July 2026

Late-arriving aircraft46.0%

the inbound aircraft was late, so this flight started late

The airline25.3%

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

Air traffic control25.1%

airspace and airport capacity, including weather-driven flow control

Weather3.5%

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 LAS → DEN. Only delays of 15 minutes or more are attributed.

Late-arriving aircraft is the largest cause on LAS → DEN, at 46.0%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 89.7% of the time and 3–6 PM departures 64.7%.

How this route holds up in bad weather

July 2023 – July 2026

The harder-hit end is DEN, where the flight lands. Its figure counts departures from DEN, so it says more about how that airport copes than about this route. Bad weather cancels 4.0 times the normal rate at DEN against 2.4 times at LAS. Cancelled in bad weather against normal hours: LAS 2.0% against 0.8%, DEN 2.8% against 0.7%. 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 LAS and DEN in hours of bad weather and in normal hours
Departures from	LAS	DEN
Cancelled in bad weather	2.0%	2.8%
Cancelled in normal hours	0.8%	0.7%
Arrived on time, bad weather	58.5%	51.5%
Arrived on time, normal hours	78.5%	78.8%
Departures in bad weather	14,522	92,610

Of the carriers on this route, United Airlines (1.0% cancelled against 2.0% for the other carriers at LAS) cancelled the fewest departures from LAS in bad weather and Frontier Airlines (4.0% cancelled against 1.8% for the other carriers at LAS) the most.

This route’s airlines in bad weather at LAS

All departures from LAS

Cancellation rates in bad weather at LAS for the airlines that fly LAS to DEN, against the other carriers at LAS in the same months
Airline	Bad-weather departures	Cancelled	Other carriers
United Airlines	1,215	1.0%below the others	2.0%
Southwest Airlines	6,925	2.0%about level	2.1%
Spirit Airlines	1,398	3.8%above the others	2.3%
Frontier Airlines	943	4.0%above the others	1.8%

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

Weather source and limits. In full: LAS (airlines), DEN, 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	10,898	74.0%	1.13%	-3 min	8.1%
United Airlines	7,735	82.7%	0.80%	-9 min	7.0%
Frontier Airlines	5,338	73.6%	1.24%	-7 min	10.9%
Spirit Airlines	408	72.8%	1.47%	0 min	8.0%

Southwest Airlines flew 44.7% of the 24,379 flights listed.

United Airlines arrived on time 9.9 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
F91994 Frontier Airlines	12:59 AM	733	82.5%
F92350 Frontier Airlines	6:00 AM	721	79.0%
F92016 Frontier Airlines	9:19 AM	686	80.7%
F94612 Frontier Airlines	12:59 AM	649	68.4%

F91994 (12:59 AM) arrived on time 82.5% of the time, 14.1 points more often than F94612 (12:59 AM) at 68.4%.

Weekly and seasonal patterns

By day of week

Mon73.6%

Tue81.0%

Wed81.9%

Thu74.4%

Fri72.9%

Sat81.1%

Sun73.9%

Wednesday is historically the most reliable day and Friday the least, a gap of 9.0 percentage points.

By month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

July is historically the weakest month and December the strongest, a spread of 19.6 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 77.0% against 78.7% in the 12 months before — declining by 1.7 percentage points.

Data and methodology

Calculated by FlyerIntel from 24,379 LAS → DEN 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

LAS airport DEN airport Return direction DEN → LAS

LAS→DEN

Right now

Route reliability

Why LAS → DEN 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 LAS → DEN 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 LAS

Airlines on this route

Flights on this route

Weekly and seasonal patterns

By day of week

By month

Reliability over time

Data and methodology