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Route · SEA → LAS · 2020–2025 BTS data

Seattle to Las Vegas

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SEA to LAS (Seattle to Las Vegas) ranks #56 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
59 min
Delay when late
36,154
Flights
#56 of 4927
Corpus placement

Cancelled

0.9%

Best Month

Nov 2024 87%

Worst Month

Jun 2025 69%

Distance

867 mi

Carriers

32

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 468 122 2 0 DL,WN,F9,AS
Nov 2025 445 90 7 0 DL,F9,AS,WN
Oct 2025 487 113 12 0 AS,OO,WN,DL,F9
Sep 2025 440 108 0 1 WN,DL,F9,AS
Aug 2025 487 123 0 0 WN,F9,NK,AS,DL
Jul 2025 521 159 4 2 AS,NK,WN,DL,F9
Jun 2025 529 164 7 3 AS,NK,WN,DL,F9
May 2025 563 123 1 0 AS,NK,WN,DL,F9
Apr 2025 506 88 1 0 DL,F9,NK,WN,AS
Mar 2025 506 93 1 0 AS,OO,WN,DL,F9,NK
Feb 2025 440 118 6 0 AS,OO,WN,DL,F9,NK
Jan 2025 484 73 0 0 AS,OO,WN,DL,F9,NK
Dec 2024 497 86 0 0 AS,DL,F9,NK,WN
Nov 2024 515 68 2 0 NK,WN,AS,DL,F9
Oct 2024 591 126 0 0 AS,OO,WN,DL,NK,F9
Sep 2024 579 132 3 0 WN,NK,AS,DL,F9
Aug 2024 619 191 8 0 AS,DL,F9,NK,WN
Jul 2024 589 173 12 1 AS,DL,F9,NK,WN
Jun 2024 554 137 2 0 AS,DL,F9,NK,WN
May 2024 558 120 0 0 AS,DL,F9,NK,OO,WN
Apr 2024 538 113 0 0 AS,DL,F9,NK,OO,WN
Mar 2024 549 132 4 2 AS,DL,F9,NK,OO,WN
Feb 2024 499 97 3 0 AS,DL,F9,NK,OO,WN
Jan 2024 539 126 34 0 AS,DL,F9,NK,WN

SEA–LAS seasonal on-time pattern

Best: November (82.8%) · weakest: July (76.9%)

76%78%80%82%84% JanFebMarAprMayJunJulAugSepOctNovDec 77.6%

Strongest calendar month

November

82.8% on-time · ~494 flights/mo

Busiest calendar month

October

~551 flights/mo avg

Weakest calendar month

July

76.9% on-time · ~501 flights/mo

Cancellation Rate

0.9%

109 of 12,503 flights

Diversion Rate

0.1%

9 of 12,503 flights

Explore origin & destination

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

SEA - Seattle

Full on-time, delay-cause, and seasonal performance for Seattle, WA.

SEA 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 SEA and LAS side by side on delays, cancellations, and reliability.

Compare SEA vs LAS

Origin-hub reliability standing

Mid-pack among SEA departures

From SEA, this corridor sits with 63 other 75–85% on-time routes out of 89 tracked departures, not the hub's reliability leaders (25 at ≥85%) and not the softest ( 1 below 75%). Destination: Las Vegas · fleet on-time rank #3043 of 4927.

What the Data Says About SEA to LAS

36,154 tracked flights put the SEA to LAS pairing (Seattle to Las Vegas) at a 80.3% on-time rate, squarely in line with the wider network. Delays that do occur run 59.3 minutes on average. Across the 867-mile route and its 32 carriers, the trailing 24 months show 0.9% cancelled and 0.1% diverted (12,503 flights sampled).

The monthly split is wide on this route: Nov 2024 posted the strongest performance at 87% on-time, while Jun 2025 came in at just 69% - a 18-point swing worth factoring into travel timing.

On the multi-year calendar, SEA–LAS peaks in November at 82.8% on-time while October carries the heaviest traffic (~551 flights per month) ; the softest month is July at 76.9%, a 5.9-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SEA to LAS rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SEA to LAS ranks #56 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 SEA to LAS? ▼
Flights from Seattle to Las Vegas have a 80.3% on-time rate based on 36,154 flights. The average delay is 59.3 minutes. The best recent month was Nov 2024 with 87% on-time.
What is the cancellation rate for SEA to LAS? ▼
Over the last 24 months, 0.9% of flights on this route were cancelled (109 of 12,503 flights) and 0.1% were diverted.
How far is the flight from SEA to LAS? ▼
The flight distance from Seattle (SEA) to Las Vegas (LAS) is approximately 867 miles. This route is served by 32 carriers.
When is the best time to fly from SEA to LAS? ▼
The best recent month for on-time performance was Nov 2024 (87% on-time). The worst was Jun 2025 (69% on-time). Consider booking during months with historically better performance.

Airports on this route

SEA Airport

Seattle
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 SEA–LAS data

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

  • Compare SEA and LAS airport profiles: delay causes and top routes differ even on the same corridor. SEA airport
  • If your dates flex, November (82.8% on-time) beats July (76.9%) 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.