Washington Dulles International ⇄ St. Louis Lambert International IAD–STL
Airlines flew 1,429 flights between Washington Dulles International IAD in Washington, DC and St. Louis Lambert International STL in St Louis, MO in the twelve months to July 2026, both directions together: 56,003 passengers in 72,210 seats, 78% of them filled, and 13,085 pounds of freight. 696 miles, about 107 minutes in the air, on 7 airlines: GoJet Airlines LLC d/b/a United Express (1,416), Republic Airline (5), United Air Lines Inc. (3), Southwest Airlines Co. (2) and 3 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 | 117 |
| 2/25 | 113 |
| 3/25 | 123 |
| 4/25 | 119 |
| 5/25 | 125 |
| 6/25 | 119 |
| 7/25 | 123 |
| 8/25 | 125 |
| 9/25 | 117 |
| 10/25 | 103 |
| 11/25 | 119 |
| 12/25 | 124 |
| 1/26 | 118 |
| 2/26 | 112 |
| 3/26 | 125 |
| 4/26 | 119 |
| 5/26 | 124 |
| 6/26 | 122 |
| 7/26 | 121 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 4,435 |
| 2/25 | 4,244 |
| 3/25 | 4,969 |
| 4/25 | 4,727 |
| 5/25 | 5,297 |
| 6/25 | 5,102 |
| 7/25 | 5,124 |
| 8/25 | 5,236 |
| 9/25 | 4,920 |
| 10/25 | 4,025 |
| 11/25 | 4,719 |
| 12/25 | 4,759 |
| 1/26 | 4,343 |
| 2/26 | 4,226 |
| 3/26 | 4,848 |
| 4/26 | 4,532 |
| 5/26 | 4,766 |
| 6/26 | 4,869 |
| 7/26 | 4,760 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| GoJet Airlines LLC d/b/a United Express G7 | 1,416 | 55,040 | 78% | scheduled passenger service |
| Republic Airline YX | 5 | 239 | 63% | scheduled passenger service |
| United Air Lines Inc. UA | 3 | 414 | 79% | charter passenger service |
| Southwest Airlines Co. WN | 2 | 254 | 73% | scheduled passenger service |
| Delta Air Lines Inc. DL | 1 | 0 | 0% | charter passenger service |
| Jet Aviation Flight Services, Inc. 27Q | 1 | 0 | 0% | charter passenger service |
| PSA Airlines Inc. OH | 1 | 56 | 74% | scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Bombardier CRJ550 | 1,416 | 50 | 55,040 |
| Embraer ERJ-175 | 5 | 76 | 239 |
| Boeing B737 Max 800 | 2 | 170 | 245 |
| Boeing 757-200 | 1 | 72 | 0 |
| Boeing B737 Max 900 | 1 | 179 | 72 |
| Bombardier BD-100-1A10 Challenger 300 | 1 | 8 | 0 |
| Boeing 737-800 | 1 | 175 | 172 |
| Canadair CRJ 900 | 1 | 76 | 56 |
| Boeing 737-900ER | 1 | 179 | 179 |
IAD → STL this direction alone · flown January 2025 to July 2026
711 flights of 719 scheduled, 27,337 passengers in 35,805 seats, 12,634 pounds of freight. GoJet Airlines LLC d/b/a United Express 705; Republic Airline 4; Delta Air Lines Inc. 1; United Air Lines Inc. 1.
STL → IAD this direction alone · flown January 2025 to July 2026
718 flights of 718 scheduled, 28,666 passengers in 36,405 seats, 451 pounds of freight. GoJet Airlines LLC d/b/a United Express 711; United Air Lines Inc. 2; Southwest Airlines Co. 2; Jet Aviation Flight Services, Inc. 1; PSA Airlines Inc. 1; Republic Airline 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: Washington Dulles International IAD and St. Louis Lambert International STL; all routes.