St. Louis (STL) to New Orleans (MSY): On-Time Performance
Data through May 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 84% on-time against a national 78%. Morning departures also hold up better than evening ones (90% vs 78%), which matters most in the rough months.
- On-time
- 84%
- arrived <15 min late
- Avg delay
- 10 min
- completed flights
- Cancelled
- 1.0%
- 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 10 p.m. departures (68%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 85% | 13 min |
| Tuesdaybest | 88% | 6 min |
| Wednesday | 85% | 7 min |
| Thursday | 82% | 10 min |
| Friday | 83% | 11 min |
| Saturday | 83% | 8 min |
| Sunday | 80% | 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 aircraft59%
- Airline operations22%
- National airspace system13%
- Weather6%
- Security1%
Frequently asked questions
- How often are flights from STL to MSY delayed?
- 17% of STL–MSY flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 10 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 10 p.m. have the worst (68%). 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 17% of the time.
- How often are STL to MSY flights cancelled?
- 1% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, 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.
Explore related pages
More routes from STL
Other ways to fly to New Orleans (MSY)
Related guides
Based on 1,464 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.