SAN (San Diego) to IAH (Houston) flights arrive on time 84% of the time. The most reliable airline on this route is United Airlines at 85%. The average delay is 74 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated March 2026.SAN → IAH
SAN (San Diego) to IAH (Houston)
SAN → IAH on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
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This route is on time most of the time. About 84% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
United Airlines edges out Spirit Airlines on this route — 85% vs 74% on time.
Airline Comparison
United Airlines leads at 85% on time; Spirit Airlines trails at 74%.
Accurate?
Good to know
Departing from SAN
80% on timeExpect ~18 min sitting on the taxiway after your gate pushes back. SAN has long runway queues.
TSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at IAH
80% on timeWhen flights into IAH are late, the average delay is 75 minutes. Build buffer if you have ground plans.
If connecting at IAH: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated March 2026. Source: Bureau of Transportation Statistics.