HOU (Houston) to SEA (Seattle) flights arrive on time 69% of the time. The most reliable airline on this route is Southwest Airlines at 68%. The average delay is 50 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated May 2026.HOU → SEA
HOU (Houston) to SEA (Seattle)
HOU → SEA on-time performance by month
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is delayed fairly often. About 69% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Accurate?
Good to know
Departing from HOU
80% on timeTSA is currently ~23 min. Best time: 4 AM (about 5 min).
Arriving at SEA
82% on timeWhen flights into SEA are late, the average delay is 57 minutes. Build buffer if you have ground plans.
If connecting at SEA: TSA is ~15 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated May 2026. Source: Bureau of Transportation Statistics.