Which airline is most reliable for SEA (Seattle) to AUS (Austin)?

The most reliable airline on the SEA to AUS route is Delta Air Lines, with an on-time arrival rate of 82%.

How often are flights delayed from SEA to AUS?

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

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

When flights from SEA to AUS are delayed, the average delay is approximately 54 minutes.

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

With 78% of SEA to AUS flights arriving on time and an average delay of 54 minutes when late, a connection under 60 minutes at AUS is risky. We recommend at least 75-90 minutes for domestic connections after this route.

SEA → AUS

SEA (Seattle) to AUS (Austin)

SEA (Seattle) to AUS (Austin) flights arrive on time 78% of the time. The most reliable airline on this route is Delta Air Lines at 82%. The average delay is 54 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 → AUS 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 82% on time vs Southwest Airlines at 48%.

Airline Comparison

Delta Air Lines leads at 82% on time; Southwest Airlines trails at 48%.

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 ~5 min. Best time: 4 AM (about 5 min).

More about SEA →

Arriving at AUS

78% on time

When flights into AUS are late, the average delay is 68 minutes. Build buffer if you have ground plans.

If connecting at AUS: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.

More about AUS →Connection times at AUS →

Flight cancelled or delayed?

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SEA Airport AUS Airport

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