St Louis (STL) to New Orleans (MSY) flights
Southwest Airlines flies nonstop from St. Louis Lambert International Airport to Louis Armstrong New Orleans International Airport, with about 14 flights a week in July 2026. The 604-mile flight takes about 1h 39m gate to gate.
- Distance
- 604 mi · 972 km
- Flight time
- 1h 39m
- Airlines
- 1
- Seats filled
- 59%
Airlines flying STL to MSY
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 14 | Boeing 737 MAX 8, Boeing 737-700 / MAX 7, Boeing 737-800 | 70,611 | 1h 39m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
STL to MSY flight schedule
2 flight numbers flew this route in August 2026, 2 of them almost daily. The first usually leaves at 8:25am and the last at 8:55pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| WN 3870Southwest Airlines | 8:25am | 10:10am | 24 | 88% |
| WN 4005Southwest Airlines | 8:55pm | 10:40pm | 20 | 75% |
Is STL to MSY on time?
From September 2025 to August 2026, 83% of 734 flights arrived within 15 minutes of schedule and 0.1% were cancelled. Flights leaving around 7pm were the most punctual (95%), those around 9pm the least (62%). Most delay time was caused by late-arriving aircraft (71%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 734 | 83% | 11 min | 0.1% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 7am to 8am | 36 | 94% | |
| 8am to 9am | 261 | 90% | |
| 9am to 10am | 31 | 90% | |
| 10am to 11am | 18 | 100% | |
| 2pm to 3pm | 18 | 78% | |
| 3pm to 4pm | 53 | 70% | |
| 5pm to 6pm | 28 | 100% | |
| 6pm to 7pm | 22 | 91% | |
| 7pm to 8pm | 37 | 95% | |
| 8pm to 9pm | 72 | 76% | |
| 9pm to 10pm | 128 | 62% | |
| 10pm to 11pm | 19 | 74% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 48 | 5,002 | |
| September 2025 | 47 | 5,347 | |
| October 2025 | 82 | 8,362 | |
| November 2025 | 57 | 5,405 | |
| December 2025 | 61 | 5,771 | |
| January 2026 | 63 | 5,489 | |
| February 2026 | 71 | 6,719 | |
| March 2026 | 68 | 6,525 | |
| April 2026 | 61 | 6,085 | |
| May 2026 | 61 | 6,008 | |
| June 2026 | 55 | 4,897 | |
| July 2026 | 60 | 5,001 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.