St. Louis (STL) to New Orleans (MSY): On-Time Performance
Data through July 2026
The calendar drives reliability on STL–MSY. September 2024 flights landed on schedule 94% of the time, but July 2024 dropped to 54% — a gap of 40 points. Across the full period the route averages 83% on-time against a national 78%. Morning departures also hold up better than evening ones (90% vs 75%), which matters most in the rough months.
- On-time
- 83%
- arrived <15 min late
- Avg delay
- 11 min
- completed flights
- Cancelled
- 0.9%
- Flights/day
- 2.0
- last 12 months
- Duration
- 1h 46m
- scheduled
- Distance
- 604 mi
Monthly on-time trend
Best time to fly from STL to MSY
Aim for departures around 7 a.m. (93% on-time); avoid 9 p.m. departures (65%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 84% | 14 min |
| Tuesdaybest | 87% | 7 min |
| Wednesday | 85% | 9 min |
| Thursday | 81% | 10 min |
| Friday | 82% | 13 min |
| Saturday | 82% | 10 min |
| Sunday | 79% | 15 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft63%
- Airline operations19%
- National airspace system12%
- Weather5%
- Security1%
Frequently asked questions
- How often are flights from STL to MSY delayed?
- 18% of STL–MSY flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 11 minutes.
- What is the best time of day to fly from STL to MSY?
- Departures around 7 a.m. have the best record (93% on-time), while departures around 9 p.m. have the worst (65%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from STL to MSY?
- The scheduled STL–MSY flight time averages 1h 46m over 604 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are STL to MSY flights cancelled?
- 0.9% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from STL to MSY?
- July 2024 was the roughest month in this dataset, with only 54% of arrivals on time. The best was September 2024 at 94%. If your dates are flexible, that 40-point gap is worth planning around.
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Related guides
Based on 1,522 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.