Which airline is most reliable for SEA (Seattle) to LAS (Las Vegas)?

The most reliable airline on the SEA to LAS route is Delta Air Lines, with an on-time arrival rate of 85%.

How often are flights delayed from SEA to LAS?

About 22% of flights from SEA to LAS experience delays. 78% arrive on time.

What's the average delay on SEA to LAS flights?

When flights from SEA to LAS are delayed, the average delay is approximately 55 minutes.

Is a short connection safe after a SEA to LAS flight?

With 78% of SEA to LAS flights arriving on time and an average delay of 55 minutes when late, a connection under 60 minutes at LAS is risky. We recommend at least 75-90 minutes for domestic connections after this route.

SEA → LAS

SEA (Seattle) to LAS (Las Vegas)

SEA (Seattle) to LAS (Las Vegas) flights arrive on time 78% of the time. The most reliable airline on this route is Delta Air Lines at 85%. The average delay is 55 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Source: Bureau of Transportation Statistics. Updated October 2026.

SEA → LAS on-time performance by month

JanFebMarAprMayJunJulAugSepOctNovDec

Worse

Better

This route is on time most of the time. About 78% of flights arrive on schedule.

Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Accurate?

Delta Air Lines is significantly more reliable on this route at 85% on time vs Frontier Airlines at 70%.

Airline Comparison

Delta Air Lines leads at 85% on time; Frontier Airlines trails at 70%.

Accurate?

Good to know

Departing from SEA

81% on time

Expect ~20 min sitting on the taxiway after your gate pushes back. SEA has long runway queues.

TSA is currently ~22 min. Best time: 4 AM (about 5 min).

More about SEA →

Arriving at LAS

78% on time

When flights into LAS are late, the average delay is 64 minutes. Build buffer if you have ground plans.

If connecting at LAS: TSA is ~22 min right now. Allow at least 60 minutes for a domestic connection.

More about LAS →Connection times at LAS →

Flight cancelled or delayed?

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Flying out of SEA? We'll brief you.

Delays, TSA, weather, gates — we'll let you know if something matters.

SEA Airport LAS Airport

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Data last updated October 2026. Source: Bureau of Transportation Statistics.