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Route · IAH → LAS · 2020–2025 BTS data

Houston to Las Vegas

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), IAH to LAS (Houston to Las Vegas) ranks #286 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

80.3%
On-time
+1.3 pts
vs US avg
74 min
Delay when late
21,825
Flights
#286 of 4927
Corpus placement

Cancelled

1.1%

Best Month

Dec 2025 90%

Worst Month

Jul 2024 60%

Distance

1,222 mi

Carriers

14

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 307 30 0 0 F9,NK,UA
Nov 2025 311 64 0 0 UA,F9,NK
Oct 2025 292 49 0 1 UA,F9,NK
Sep 2025 255 43 0 1 UA,NK,F9
Aug 2025 286 59 3 0 F9,NK,UA
Jul 2025 291 71 2 0 NK,UA,F9
Jun 2025 289 86 4 4 UA,F9,NK
May 2025 315 79 4 0 NK,UA,F9
Apr 2025 318 49 0 0 F9,NK,UA
Mar 2025 336 58 3 0 UA,NK,F9
Feb 2025 296 29 0 0 UA,F9,NK
Jan 2025 312 66 13 1 UA,F9,NK
Dec 2024 330 66 1 0 F9,NK,UA
Nov 2024 365 53 0 0 UA,NK,F9
Oct 2024 387 49 0 2 UA,NK,F9
Sep 2024 327 67 1 0 NK,UA,F9
Aug 2024 321 68 2 0 F9,NK,WN,UA
Jul 2024 363 147 25 0 F9,NK,UA,WN
Jun 2024 359 102 4 0 F9,NK,UA,WN
May 2024 379 128 6 0 F9,NK,UA,WN
Apr 2024 361 80 1 0 F9,NK,UA,WN
Mar 2024 375 91 0 1 F9,NK,UA,WN
Feb 2024 310 57 0 1 F9,NK,UA,WN
Jan 2024 330 69 18 0 F9,NK,WN,UA

IAH–LAS seasonal on-time pattern

Best: February (86.5%) · weakest: July (72.6%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 83.7%

Strongest calendar month

February

86.5% on-time · ~280 flights/mo

Busiest calendar month

October

~333 flights/mo avg

Weakest calendar month

July

72.6% on-time · ~310 flights/mo

Cancellation Rate

1.1%

87 of 7,815 flights

Diversion Rate

0.1%

11 of 7,815 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

IAH - Houston

Full on-time, delay-cause, and seasonal performance for Houston, TX.

IAH on-time profile

LAS - Las Vegas

Full on-time, delay-cause, and seasonal performance for Las Vegas, NV.

LAS on-time profile

Compare the two airports

See IAH and LAS side by side on delays, cancellations, and reliability.

Compare IAH vs LAS

Origin-hub reliability standing

Mid-pack among IAH departures

From IAH, this corridor sits with 79 other 75–85% on-time routes out of 102 tracked departures, not the hub's reliability leaders (17 at ≥85%) and not the softest ( 6 below 75%). Destination: Las Vegas · fleet on-time rank #3020 of 4927.

What the Data Says About IAH to LAS

21,825 tracked flights put the IAH to LAS pairing (Houston to Las Vegas) at a 80.3% on-time rate, squarely in line with the wider network. Delays that do occur run 73.6 minutes on average. Across the 1,222-mile route and its 14 carriers, the trailing 24 months show 1.1% cancelled and 0.1% diverted (7,815 flights sampled).

The monthly split is wide on this route: Dec 2025 posted the strongest performance at 90% on-time, while Jul 2024 came in at just 60% - a 31-point swing worth factoring into travel timing.

On the multi-year calendar, IAH–LAS peaks in February at 86.5% on-time while October carries the heaviest traffic (~333 flights per month) ; the softest month is July at 72.6%, a 13.9-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does IAH to LAS rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, IAH to LAS ranks #286 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from IAH to LAS? ▼
Flights from Houston to Las Vegas have a 80.3% on-time rate based on 21,825 flights. The average delay is 73.6 minutes. The best recent month was Dec 2025 with 90% on-time.
What is the cancellation rate for IAH to LAS? ▼
Over the last 24 months, 1.1% of flights on this route were cancelled (87 of 7,815 flights) and 0.1% were diverted.
How far is the flight from IAH to LAS? ▼
The flight distance from Houston (IAH) to Las Vegas (LAS) is approximately 1,222 miles. This route is served by 14 carriers.
When is the best time to fly from IAH to LAS? ▼
The best recent month for on-time performance was Dec 2025 (90% on-time). The worst was Jul 2024 (60% on-time). Consider booking during months with historically better performance.

Airports on this route

IAH Airport

Houston
LAS Airport

Las Vegas
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using IAH–LAS data

IAH–LAS is mid-pack at 80.3% on-time; month and carrier mix move more than the corridor headline.

  • Compare IAH and LAS airport profiles: delay causes and top routes differ even on the same corridor. IAH airport
  • If your dates flex, February (86.5% on-time) beats July (72.6%) on this corridor. Seasonal chart
  • 4 other routes post a similar 80.3% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.