St. Louis Lambert International ⇄ Ronald Reagan Washington Ntl STL–DCA
Airlines flew 4,708 flights between St. Louis Lambert International STL in St Louis, MO and Ronald Reagan Washington Ntl DCA in Washington, DC in the twelve months to July 2026, both directions together: 401,896 passengers in 586,782 seats, 68% of them filled, and 120,283 pounds of freight. 719 miles, about 96 minutes in the air, on 8 airlines: Southwest Airlines Co. (2,763), PSA Airlines Inc. (1,129), Republic Airline (421), American Airlines Inc. (348) and 4 more. Planning to fly it yourself? The weather and winds along this route right now.
Flights by month both directions
By month, as a table
| flights | |
|---|---|
| 1/25 | 308 |
| 2/25 | 299 |
| 3/25 | 332 |
| 4/25 | 393 |
| 5/25 | 400 |
| 6/25 | 378 |
| 7/25 | 371 |
| 8/25 | 390 |
| 9/25 | 434 |
| 10/25 | 445 |
| 11/25 | 407 |
| 12/25 | 401 |
| 1/26 | 368 |
| 2/26 | 344 |
| 3/26 | 387 |
| 4/26 | 387 |
| 5/26 | 387 |
| 6/26 | 384 |
| 7/26 | 374 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 25,434 |
| 2/25 | 22,447 |
| 3/25 | 31,134 |
| 4/25 | 37,703 |
| 5/25 | 42,971 |
| 6/25 | 38,863 |
| 7/25 | 37,327 |
| 8/25 | 36,767 |
| 9/25 | 37,628 |
| 10/25 | 40,041 |
| 11/25 | 30,547 |
| 12/25 | 32,592 |
| 1/26 | 23,846 |
| 2/26 | 23,123 |
| 3/26 | 33,119 |
| 4/26 | 32,922 |
| 5/26 | 35,019 |
| 6/26 | 37,687 |
| 7/26 | 38,605 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| Southwest Airlines Co. WN | 2,763 | 287,493 | 68% | charter passenger service, scheduled passenger service |
| PSA Airlines Inc. OH | 1,129 | 60,273 | 75% | scheduled passenger service |
| Republic Airline YX | 421 | 21,696 | 68% | scheduled passenger service |
| American Airlines Inc. AA | 348 | 29,376 | 65% | scheduled passenger service |
| Envoy Air MQ | 43 | 2,471 | 76% | scheduled passenger service |
| JetBlue Airways B6 | 2 | 318 | 98% | charter passenger service |
| Alaska Airlines Inc. AS | 1 | 143 | 89% | scheduled passenger service |
| United Air Lines Inc. UA | 1 | 126 | 100% | scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Boeing 737-700/700LR/Max 7 | 1,624 | 139 | 164,380 |
| Boeing B737 Max 800 | 726 | 175 | 77,112 |
| Canadair CRJ 900 | 607 | 76 | 33,708 |
| Canadair RJ-700 | 522 | 65 | 26,565 |
| Embraer ERJ-175 | 464 | 76 | 24,167 |
| Boeing 737-800 | 417 | 175 | 46,575 |
| Airbus Industrie A319 | 338 | 128 | 27,974 |
| Airbus Industrie A320-100/200 | 5 | 155 | 574 |
| Airbus Industrie A321-200n | 3 | 196 | 508 |
| Airbus Industrie A321Neoxlr | 2 | 190 | 333 |
STL → DCA this direction alone · flown January 2025 to July 2026
2,342 flights of 2,411 scheduled, 198,159 passengers in 294,377 seats, 78,533 pounds of freight. Southwest Airlines Co. 1,377; PSA Airlines Inc. 560; Republic Airline 210; American Airlines Inc. 172; Envoy Air 22; JetBlue Airways 1.
DCA → STL this direction alone · flown January 2025 to July 2026
2,366 flights of 2,418 scheduled, 203,737 passengers in 292,405 seats, 41,750 pounds of freight. Southwest Airlines Co. 1,386; PSA Airlines Inc. 569; Republic Airline 211; American Airlines Inc. 176; Envoy Air 21; Alaska Airlines Inc. 1; JetBlue Airways 1; United Air Lines Inc. 1.
Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: St. Louis Lambert International STL and Ronald Reagan Washington Ntl DCA; all routes.