Historical on-time performance
New Orleans to St. Louis
604 miData through Dec 2025Source: US DOT · BTS
Flights on MSY–STL arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled1.8%of scheduled flights
based on 732 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time82%Medianon timep9030 minCancel1.8%Flights732
Why flights run late
Delay causes
- Airline20%
- Weather2%
- Air traffic (NAS)8%
- Late aircraft69%
- Security1%
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 MSY → 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 — 93% on time.
- Mornings93% on time · p90 5 min · 1,013 flights
- Middays84% on time · p90 20 min · 132 flights · limited
- Evenings69% on time · p90 50 min · 826 flights
- Afternoons68% on time · p90 50 min · 107 flights · limited
- Overnights65% on time · p90 55 min · 84 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 89% on time.
- Wednesdays89% on time · p90 10 min · 300 flights
- Saturdays86% on time · p90 20 min · 208 flights
- Tuesdays85% on time · p90 20 min · 300 flights
- Thursdays81% on time · p90 40 min · 323 flights
- Mondays81% on time · p90 30 min · 328 flights
- Fridays79% on time · p90 45 min · 327 flights
- Sundays73% on time · p90 50 min · 376 flights
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