STL (St. Louis) to LAX (Los Angeles) flights arrive on time 79% of the time. The most reliable airline on this route is American Airlines at 83%. The average delay is 67 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated May 2026.STL → LAX
STL (St. Louis) to LAX (Los Angeles)
STL → LAX on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
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This route is on time most of the time. About 79% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
American Airlines edges out Southwest Airlines on this route — 83% vs 78% on time.
Airline Comparison
American Airlines leads at 83% on time; Southwest Airlines trails at 78%.
Accurate?
Good to know
Departing from STL
81% on timeTSA is currently ~24 min. Best time: 4 AM (about 5 min).
Arriving at LAX
82% on timeWhen flights into LAX are late, the average delay is 68 minutes. Build buffer if you have ground plans.
If connecting at LAX: TSA is ~22 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.