Washington (DCA) to St Louis (STL) flights
Southwest Airlines, American Airlines, PSA Airlines, Republic Airline fly nonstop from Ronald Reagan Washington National Airport to St. Louis Lambert International Airport, with about 42 flights a week in July 2026. The 719-mile flight takes about 2h 19m gate to gate.
- Distance
- 719 mi · 1,157 km
- Flight time
- 2h 19m
- Airlines
- 4
- Seats filled
- 70%
Airlines flying DCA to STL
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 26 | Boeing 737-700 / MAX 7, Boeing 737 MAX 8, Boeing 737-800 | 143,658 | 2h 14m |
| American Airlines | 7 | Airbus A319, Airbus A320-100/200, Airbus A321 | 16,568 | 2h 12m |
| PSA Airlines | 6 | Bombardier CRJ900, Bombardier CRJ700 | 31,262 | 2h 27m |
| Republic Airline | 4 | Embraer E175 | 10,368 | 2h 30m |
| Envoy AirSeasonal or ended | n/a | Embraer E175 | 1,012 | 2h 35m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
DCA to STL flight schedule
15 flight numbers flew this route in August 2026, 2 of them almost daily. The first usually leaves at 8:00am and the last at 8:00pm. 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 225Southwest Airlines | 8:00am | 9:10am | 4 | n/a |
| WN 391Southwest Airlines | 8:00am | 9:10am | 8 | n/a |
| WN 2431Southwest Airlines | 8:15am | 9:35am | 16 | 100% |
| AA 4776American Airlines · operated by Republic Airline | 8:40am | 10:14am | 19 | 79% |
| WN 1678Southwest Airlines | 12:00pm | 1:15pm | 14 | 79% |
| WN 2442Southwest Airlines | 12:15pm | 1:25pm | 12 | 67% |
| WN 2788Southwest Airlines | 2:40pm | 3:55pm | 8 | n/a |
| WN 4974Southwest Airlines | 2:45pm | 4:00pm | 4 | n/a |
| WN 3362Southwest Airlines | 3:30pm | 4:45pm | 12 | n/a |
| AA 5629American Airlines · operated by PSA Airlines | 3:59pm | 5:27pm | 27 | 59% |
| WN 1946Southwest Airlines | 6:40pm | 7:50pm | 8 | n/a |
| WN 1726Southwest Airlines | 6:50pm | 8:00pm | 12 | 18% |
| WN 4166Southwest Airlines | 6:50pm | 8:00pm | 6 | n/a |
| AA 5451American Airlines · operated by PSA Airlines | 7:59pm | 9:28pm | 23 | 53% |
| AA 3028American Airlines | 8:00pm | 9:21pm | 4 | 48% |
Is DCA to STL on time?
From September 2025 to August 2026, 72% of 2,415 flights arrived within 15 minutes of schedule and 3.1% were cancelled. Flights leaving around 8am were the most punctual (85%), those around 8pm the least (53%). Most delay time was caused by late-arriving aircraft (52%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 1,403 | 74% | 17 min | 1.9% |
| American Airlines | 1,012 | 70% | 26 min | 4.7% |
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 | 113 | 83% | |
| 8am to 9am | 497 | 85% | |
| 11am to 12pm | 61 | 82% | |
| 12pm to 1pm | 382 | 81% | |
| 1pm to 2pm | 84 | 67% | |
| 2pm to 3pm | 320 | 66% | |
| 3pm to 4pm | 237 | 66% | |
| 6pm to 7pm | 359 | 59% | |
| 7pm to 8pm | 172 | 68% | |
| 8pm to 9pm | 145 | 53% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 196 | 19,121 | |
| September 2025 | 214 | 18,714 | |
| October 2025 | 223 | 20,346 | |
| November 2025 | 206 | 16,052 | |
| December 2025 | 202 | 17,055 | |
| January 2026 | 186 | 11,747 | |
| February 2026 | 173 | 11,359 | |
| March 2026 | 197 | 17,359 | |
| April 2026 | 193 | 15,849 | |
| May 2026 | 192 | 16,992 | |
| June 2026 | 192 | 19,003 | |
| July 2026 | 188 | 19,540 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.