Historical on-time performance
Los Angeles to St. Louis
1,593 miData through Dec 2025Source: US DOT · BTS
Flights on LAX–STL arrive on time 81% of the time over the last 12 months.
On-time rate81%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 870 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- American AirlinesOn-time87%Medianon timep9020 minCancel0.0%Flights61
- Southwest AirlinesOn-time82%Medianon timep9030 minCancel0.9%Flights687
- SkyWest AirlinesOn-time73%Medianon timep9035 minCancel0.0%Flights122
Why flights run late
Delay causes
- Airline27%
- Weather0%
- Air traffic (NAS)13%
- Late aircraft59%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly LAX → STL
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 94% on time.
- Mornings94% on time · p90 5 min · 1,026 flights
- Afternoons74% on time · p90 30 min · 322 flights
- Middays73% on time · p90 30 min · 322 flights
- Overnights70% on time · p90 35 min · 64 flights · limited
- Evenings69% on time · p90 60 min · 1,583 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 80% on time.
- Tuesdays80% on time · p90 35 min · 469 flights
- Wednesdays79% on time · p90 35 min · 470 flights
- Saturdays78% on time · p90 30 min · 390 flights
- Fridays78% on time · p90 30 min · 514 flights
- Sundays77% on time · p90 40 min · 458 flights
- Mondays76% on time · p90 45 min · 512 flights
- Thursdays76% on time · p90 40 min · 504 flights
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