Historical on-time performance
New Orleans to St. Louis
604 miData through May 2026Source: US DOT · BTS
Flights on MSY–STL arrive on time 81% of the time over the last 12 months.
On-time rate81%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.4%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-time81%Medianon timep9035 minCancel0.4%Flights732
Why flights run late
Delay causes
- Airline21%
- Weather2%
- Air traffic (NAS)5%
- Late aircraft72%
- Security1%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline33%
- Weather33%
- Air traffic (NAS)33%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 3 cancellations with a reported cause (BTS reports causes from June 2003).
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 (2023-06 .. 2026-05).
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 · 1,018 flights
- Middays84% on time · p90 20 min · 135 flights · limited
- Evenings70% on time · p90 50 min · 827 flights
- Afternoons66% on time · p90 55 min · 117 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 91% on time.
- Wednesdays91% on time · p90 10 min · 298 flights
- Tuesdays86% on time · p90 20 min · 299 flights
- Saturdays85% on time · p90 20 min · 209 flights
- Thursdays82% on time · p90 35 min · 330 flights
- Fridays80% on time · p90 40 min · 334 flights
- Mondays79% on time · p90 35 min · 331 flights
- Sundays73% on time · p90 50 min · 382 flights
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