SFO (San Francisco) to IAH (Houston) flights arrive on time 85% of the time. The most reliable airline on this route is United Airlines at 85%. The average delay is 56 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated July 2026.SFO → IAH
SFO (San Francisco) to IAH (Houston)
SFO → IAH on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is usually on time. About 85% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
Accurate?
Good to know
Departing from SFO
78% on timeExpect ~21 min sitting on the taxiway after your gate pushes back. SFO has long runway queues.
TSA is currently ~20 min. Best time: 4 AM (about 5 min).
Arriving at IAH
79% on timeWhen flights into IAH are late, the average delay is 77 minutes. Build buffer if you have ground plans.
If connecting at IAH: TSA is ~10 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
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Flying out of SFO? We'll brief you.
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Data last updated July 2026. Source: Bureau of Transportation Statistics.