Historical on-time performance
St. Louis to New Orleans
604 miData through Dec 2025Source: US DOT · BTS
Flights on STL–MSY arrive on time 81% of the time over the last 12 months.
On-time rate81%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.5%of scheduled flights
based on 734 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 timep9040 minCancel1.5%Flights734
Why flights run late
Delay causes
- Airline18%
- Weather7%
- Air traffic (NAS)11%
- Late aircraft64%
- 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 STL → MSY
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 73% to 89% on time.
- Mornings89% on time · p90 10 min · 853 flights
- Middays87% on time · p90 20 min · 159 flights · limited
- Afternoons75% on time · p90 35 min · 244 flights
- Evenings74% on time · p90 45 min · 476 flights
- Overnights73% on time · p90 55 min · 425 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 85% on time.
- Tuesdays85% on time · p90 20 min · 300 flights
- Saturdays84% on time · p90 25 min · 209 flights
- Mondays83% on time · p90 30 min · 330 flights
- Wednesdays81% on time · p90 30 min · 300 flights
- Fridays80% on time · p90 40 min · 326 flights
- Thursdays79% on time · p90 30 min · 323 flights
- Sundays77% on time · p90 40 min · 369 flights
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