St. Louis Lambert International ⇄ Denver International STL–DEN
Airlines flew 7,353 flights between St. Louis Lambert International STL in St Louis, MO and Denver International DEN in Denver, CO in the twelve months to July 2026, both directions together: 937,026 passengers in 1,202,833 seats, 78% of them filled, and 929,839 pounds of freight. 770 miles, about 116 minutes in the air, on 7 airlines: Southwest Airlines Co. (4,361), United Air Lines Inc. (2,187), Frontier Airlines Inc. (579), SkyWest Airlines Inc. (220) 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 | 513 |
| 2/25 | 507 |
| 3/25 | 595 |
| 4/25 | 582 |
| 5/25 | 643 |
| 6/25 | 679 |
| 7/25 | 696 |
| 8/25 | 655 |
| 9/25 | 650 |
| 10/25 | 667 |
| 11/25 | 547 |
| 12/25 | 533 |
| 1/26 | 502 |
| 2/26 | 502 |
| 3/26 | 636 |
| 4/26 | 573 |
| 5/26 | 624 |
| 6/26 | 708 |
| 7/26 | 756 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 61,213 |
| 2/25 | 60,160 |
| 3/25 | 76,444 |
| 4/25 | 67,560 |
| 5/25 | 80,026 |
| 6/25 | 88,969 |
| 7/25 | 90,474 |
| 8/25 | 84,314 |
| 9/25 | 84,532 |
| 10/25 | 86,363 |
| 11/25 | 69,059 |
| 12/25 | 65,718 |
| 1/26 | 59,496 |
| 2/26 | 57,758 |
| 3/26 | 79,806 |
| 4/26 | 71,364 |
| 5/26 | 82,976 |
| 6/26 | 96,186 |
| 7/26 | 99,454 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| Southwest Airlines Co. WN | 4,361 | 553,677 | 76% | scheduled passenger service |
| United Air Lines Inc. UA | 2,187 | 279,234 | 83% | charter passenger service, scheduled passenger service |
| Frontier Airlines Inc. F9 | 579 | 91,672 | 74% | scheduled passenger service |
| SkyWest Airlines Inc. OO | 220 | 12,156 | 74% | scheduled passenger service |
| Global Crossing Airlines, Inc. GCA | 3 | 89 | 17% | charter passenger service |
| Sun Country Airlines d/b/a MN Airlines SY | 2 | 85 | 23% | charter passenger service |
| American Airlines Inc. AA | 1 | 113 | 66% | scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Boeing 737-800 | 2,087 | 172 | 278,397 |
| Boeing B737 Max 800 | 2,080 | 175 | 275,741 |
| Boeing 737-700/700LR/Max 7 | 1,068 | 140 | 115,937 |
| Airbus Industrie A319 | 562 | 126 | 62,261 |
| Airbus Industrie A320-100/200 | 532 | 151 | 67,535 |
| Airbus Industrie A321-200n | 268 | 227 | 43,016 |
| Embraer ERJ-175 | 220 | 75 | 12,156 |
| Boeing 737-900ER | 192 | 179 | 29,154 |
| Airbus Industrie A320-200n | 179 | 186 | 27,120 |
| Airbus Industrie A321Neoxlr | 115 | 230 | 18,900 |
| Boeing B737 Max 900 | 48 | 179 | 6,586 |
| Boeing 757-300 | 2 | 234 | 223 |
STL → DEN this direction alone · flown January 2025 to July 2026
3,662 flights of 3,674 scheduled, 480,693 passengers in 604,065 seats, 576,889 pounds of freight. Southwest Airlines Co. 2,170; United Air Lines Inc. 1,090; Frontier Airlines Inc. 289; SkyWest Airlines Inc. 111; Global Crossing Airlines, Inc. 1; Sun Country Airlines d/b/a MN Airlines 1.
DEN → STL this direction alone · flown January 2025 to July 2026
3,691 flights of 3,694 scheduled, 456,333 passengers in 598,768 seats, 352,950 pounds of freight, 59 pounds of mail. Southwest Airlines Co. 2,191; United Air Lines Inc. 1,097; Frontier Airlines Inc. 290; SkyWest Airlines Inc. 109; Global Crossing Airlines, Inc. 2; American Airlines Inc. 1; Sun Country Airlines d/b/a MN Airlines 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 Denver International DEN; all routes.