STL (St. Louis) to LAX (Los Angeles) flights arrive on time 76% of the time. The most reliable airline on this route is American Airlines at 78%. The average delay is 69 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated October 2026.STL → LAX
STL (St. Louis) to LAX (Los Angeles)
STL → LAX on-time performance by month
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JanFebMarAprMayJunJulAugSepOctNovDec
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This route is on time most of the time. About 76% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Airlines are roughly equal on this route — American Airlines leads slightly at 78% vs Southwest Airlines at 75%.
Airline Comparison
American Airlines leads at 78% on time; Southwest Airlines trails at 75%.
Accurate?
Good to know
Departing from STL
80% on timeTSA is currently ~30 min. Best time: 4 AM (about 5 min).
Arriving at LAX
81% on timeWhen flights into LAX are late, the average delay is 70 minutes. Build buffer if you have ground plans.
If connecting at LAX: TSA is ~27 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what American Airlines owes you — refund rights, action plan, complaint email. Free.
Flying out of STL? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated October 2026. Source: Bureau of Transportation Statistics.