St Louis (STL) to Washington (DCA) flights
Southwest Airlines, PSA Airlines, American Airlines, Republic Airline fly nonstop from St. Louis Lambert International Airport to Ronald Reagan Washington National Airport, with about 42 flights a week in July 2026. The 719-mile flight takes about 1h 58m gate to gate.
- Distance
- 719 mi · 1,157 km
- Flight time
- 1h 58m
- Airlines
- 4
- Seats filled
- 67%
Airlines flying STL to DCA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 25 | Boeing 737-700 / MAX 7, Boeing 737 MAX 8, Boeing 737-800 | 142,952 | 1h 53m |
| PSA Airlines | 6 | Bombardier CRJ900, Bombardier CRJ700 | 29,011 | 2h 5m |
| American Airlines | 6 | Airbus A319, Airbus A320-100/200, Airbus A321 | 12,808 | 2h 0m |
| Republic Airline | 4 | Embraer E175 | 11,328 | 2h 4m |
| Envoy AirSeasonal or ended | n/a | Embraer E175 | 1,459 | 2h 12m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
STL to DCA flight schedule
10 flight numbers flew this route in August 2026, 5 of them almost daily. The first usually leaves at 6:00am and the last at 7:55pm. 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) |
|---|---|---|---|---|
| AA 5015American Airlines · operated by PSA Airlines | 6:00am | 9:14am | 26 | 84% |
| WN 1930Southwest Airlines | 8:10am | 11:10am | 28 | 85% |
| AA 4776American Airlines · operated by Republic Airline | 10:44am | 2:17pm | 19 | 89% |
| WN 3015Southwest Airlines | 1:00pm | 4:00pm | 4 | n/a |
| WN 2999Southwest Airlines | 1:10pm | 4:10pm | 20 | 83% |
| WN 1965Southwest Airlines | 3:30pm | 6:35pm | 12 | 50% |
| WN 2301Southwest Airlines | 3:55pm | 6:55pm | 16 | 73% |
| AA 5629American Airlines · operated by PSA Airlines | 5:57pm | 9:14pm | 23 | 77% |
| WN 1493Southwest Airlines | 7:10pm | 10:10pm | 8 | n/a |
| WN 3825Southwest Airlines | 7:55pm | 10:55pm | 20 | 47% |
Is STL to DCA on time?
From September 2025 to August 2026, 74% of 2,417 flights arrived within 15 minutes of schedule and 3.2% were cancelled. Flights leaving around 8am were the most punctual (90%), those around 7pm the least (59%). Most delay time was caused by late-arriving aircraft (37%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 1,404 | 73% | 17 min | 1.5% |
| American Airlines | 1,013 | 75% | 26 min | 5.5% |
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 | 288 | 85% | |
| 8am to 9am | 377 | 90% | |
| 9am to 10am | 136 | 79% | |
| 10am to 11am | 129 | 80% | |
| 1pm to 2pm | 375 | 69% | |
| 3pm to 4pm | 427 | 68% | |
| 5pm to 6pm | 135 | 63% | |
| 6pm to 7pm | 143 | 63% | |
| 7pm to 8pm | 256 | 59% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 194 | 17,646 | |
| September 2025 | 216 | 18,322 | |
| October 2025 | 222 | 19,695 | |
| November 2025 | 201 | 14,495 | |
| December 2025 | 199 | 15,537 | |
| January 2026 | 182 | 12,099 | |
| February 2026 | 171 | 11,764 | |
| March 2026 | 190 | 15,760 | |
| April 2026 | 192 | 16,733 | |
| May 2026 | 195 | 18,027 | |
| June 2026 | 190 | 18,415 | |
| July 2026 | 186 | 19,065 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.