Raleigh/Durham (RDU) to St Louis (STL) flights
Southwest Airlines flies nonstop from Raleigh-Durham International Airport to St. Louis Lambert International Airport, with about 14 flights a week in July 2026. The 668-mile flight takes about 2h 3m gate to gate.
- Distance
- 668 mi · 1,075 km
- Flight time
- 2h 3m
- Airlines
- 1
- Seats filled
- 65%
Airlines flying RDU to STL
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 14 | Boeing 737 MAX 8, Boeing 737-800, Boeing 737-700 / MAX 7 | 70,480 | 2h 3m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
RDU to STL flight schedule
5 flight numbers flew this route in August 2026, 1 of them almost daily. The first usually leaves at 6:00am and the last at 6:55pm. 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 3357Southwest Airlines | 6:00am | 7:05am | 28 | 96% |
| WN 4057Southwest Airlines | 12:30pm | 1:30pm | 4 | n/a |
| WN 380Southwest Airlines | 6:50pm | 7:55pm | 4 | n/a |
| WN 3266Southwest Airlines | 6:55pm | 8:00pm | 12 | 50% |
| WN 3428Southwest Airlines | 6:55pm | 8:00pm | 8 | n/a |
Is RDU to STL on time?
From September 2025 to August 2026, 80% of 664 flights arrived within 15 minutes of schedule and 0.3% were cancelled. Flights leaving around 6am were the most punctual (96%), those around 7pm the least (47%). Most delay time was caused by late-arriving aircraft (64%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 664 | 80% | 12 min | 0.3% |
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 |
|---|---|---|---|
| 6am to 7am | 176 | 96% | |
| 7am to 8am | 59 | 93% | |
| 8am to 9am | 67 | 94% | |
| 11am to 12pm | 15 | 93% | |
| 5pm to 6pm | 36 | 89% | |
| 6pm to 7pm | 114 | 76% | |
| 7pm to 8pm | 121 | 47% | |
| 8pm to 9pm | 61 | 75% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 54 | 6,603 | |
| September 2025 | 52 | 6,529 | |
| October 2025 | 58 | 7,196 | |
| November 2025 | 58 | 6,491 | |
| December 2025 | 60 | 6,764 | |
| January 2026 | 31 | 3,033 | |
| February 2026 | 34 | 3,459 | |
| March 2026 | 59 | 5,807 | |
| April 2026 | 63 | 5,660 | |
| May 2026 | 65 | 6,130 | |
| June 2026 | 60 | 6,481 | |
| July 2026 | 61 | 6,471 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.