Which airline is most reliable for IAH (Houston) to SEA (Seattle)?

We don't have enough airline-level data for the IAH to SEA route yet.

How often are flights delayed from IAH to SEA?

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

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

When flights from IAH to SEA are delayed, the average delay is approximately 48 minutes.

IAH → SEA

IAH (Houston) to SEA (Seattle)

IAH (Houston) to SEA (Seattle) flights arrive on time 78% of the time. The average delay is 48 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Source: Bureau of Transportation Statistics. Updated March 2026.

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IAH → SEA on-time performance by month

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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).

IAH Airport SEA Airport

Check the return: SEA → IAH

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