Route Reliability
St. Louis → New Orleans
STL–MSY · 604 miles · St. Louis Lambert International Airport to Louis Armstrong New Orleans International Airport
- 84%
- Arrive within 15 minutes
- 3 min
- Average arrival delay
- 0.1%
- Cancelled
- 733
- Flights in the data
Data through May 2026.
Southwest Airlines is the only airline in this data on this route, arriving on time 84% of the time across 733 flights. No comparison to make.
What the data says
Morning-you made the right choice.
STL–MSY flights departing between 9 AM–12 PM arrived on time 92% of the time, versus 69% between 9 PM–12 AM.
Sunday scaries are real for this one.
STL–MSY flights arrived on time 93% of the time on Tuesdays and just 76% on Sundays. That gap is worth planning around.
It basically never cancels.
Out of 733 scheduled flights, only 0.1% were cancelled.
Slipping a little lately.
STL–MSY flights arrived on time 84% of the time over the last three months in the data, compared with 89% in the three months before that.
Flights on this route
The breakdown
- Mon87%(114 flights)
- Tue93%(100 flights)
- Wed90%(99 flights)
- Thu79%(114 flights)
- Fri80%(112 flights)
- Sat85%(65 flights)
- Sun76%(128 flights)
- 3–6 AM—(1 flights)
- 6–9 AM92%(235 flights)
- 9 AM–12 PM92%(102 flights)
- 12–3 PM86%(28 flights)
- 3–6 PM81%(83 flights)
- 6–9 PM78%(177 flights)
- 9 PM–12 AM69%(106 flights)
Jun 67% → May 84% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 67% | 57 |
| July 2025 | 75% | 57 |
| August 2025 | 92% | 48 |
| September 2025 | 94% | 47 |
| October 2025 | 81% | 82 |
| November 2025 | 83% | 57 |
| December 2025 | 85% | 61 |
| January 2026 | 89% | 63 |
| February 2026 | 92% | 71 |
| March 2026 | 79% | 67 |
| April 2026 | 89% | 61 |
| May 2026 | 84% | 61 |
Keep nerding
Based on 733 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.