Which airline is most reliable for SEA (Seattle) to DAL (Dallas)?

The most reliable airline on the SEA to DAL route is Alaska Airlines, with an on-time arrival rate of 82%.

How often are flights delayed from SEA to DAL?

About 24% of flights from SEA to DAL experience delays. 76% arrive on time.

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

When flights from SEA to DAL are delayed, the average delay is approximately 42 minutes.

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

With 76% of SEA to DAL flights arriving on time and an average delay of 42 minutes when late, a connection under 60 minutes at DAL is risky. We recommend at least 75-90 minutes for domestic connections after this route.

SEA → DAL

SEA (Seattle) to DAL (Dallas)

SEA (Seattle) to DAL (Dallas) flights arrive on time 76% of the time. The most reliable airline on this route is Alaska Airlines at 82%. The average delay is 42 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Source: Bureau of Transportation Statistics. Updated May 2026.

SEA → DAL on-time performance by month

JanFebMarAprMayJunJulAugSepOctNovDec

Worse

Better

This route is on time most of the time. About 76% of flights arrive on schedule.

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

Accurate?

Alaska Airlines is significantly more reliable on this route at 82% on time vs Southwest Airlines at 62%.

Airline Comparison

Alaska Airlines leads at 82% on time; Southwest Airlines trails at 62%.

Accurate?

Good to know

Departing from SEA

82% on time

Expect ~19 min sitting on the taxiway after your gate pushes back. SEA has long runway queues.

TSA is currently ~15 min. Best time: 4 AM (about 5 min).

More about SEA →

Arriving at DAL

78% on time

When flights into DAL are late, the average delay is 55 minutes. Build buffer if you have ground plans.

If connecting at DAL: TSA is ~21 min right now. Allow at least 60 minutes for a domestic connection.

DAL has a 2.1% cancellation rate — keep the airline app handy for rebooking.

More about DAL →Connection times at DAL →

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SEA Airport DAL Airport

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