SJC (San Jose) to STL (St. Louis) flights arrive on time 94% of the time. The most reliable airline on this route is Southwest Airlines at 94%. The average delay is 33 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated August 2026.SJC → STL
SJC (San Jose) to STL (St. Louis)
SJC → STL on-time performance by month
24
JanFebMarAprMayJunJulAugSepOctNovDec
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This route is usually on time. About 94% 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 SJC
84% on timeTSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at STL
81% on timeWhen flights into STL are late, the average delay is 66 minutes. Build buffer if you have ground plans.
If connecting at STL: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Southwest Airlines owes you — refund rights, action plan, complaint email. Free.
Flying out of SJC? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
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Data last updated August 2026. Source: Bureau of Transportation Statistics.