St. Louis Lambert International ⇄ Chicago O'Hare International STL–ORD
Airlines flew 10,220 flights between St. Louis Lambert International STL in St Louis, MO and Chicago O'Hare International ORD in Chicago, IL in the twelve months to July 2026, both directions together: 614,664 passengers in 806,929 seats, 76% of them filled, and 206,427 pounds of freight. 258 miles, about 52 minutes in the air, on 21 airlines: GoJet Airlines LLC d/b/a United Express (4,073), SkyWest Airlines Inc. (1,565), Envoy Air (1,526), United Air Lines Inc. (1,136) and 17 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 | 640 |
| 2/25 | 633 |
| 3/25 | 730 |
| 4/25 | 770 |
| 5/25 | 824 |
| 6/25 | 838 |
| 7/25 | 846 |
| 8/25 | 804 |
| 9/25 | 769 |
| 10/25 | 826 |
| 11/25 | 748 |
| 12/25 | 745 |
| 1/26 | 699 |
| 2/26 | 767 |
| 3/26 | 902 |
| 4/26 | 984 |
| 5/26 | 1,078 |
| 6/26 | 927 |
| 7/26 | 971 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 34,785 |
| 2/25 | 35,377 |
| 3/25 | 46,686 |
| 4/25 | 48,556 |
| 5/25 | 56,271 |
| 6/25 | 60,817 |
| 7/25 | 62,795 |
| 8/25 | 54,187 |
| 9/25 | 53,455 |
| 10/25 | 56,535 |
| 11/25 | 39,489 |
| 12/25 | 39,086 |
| 1/26 | 34,205 |
| 2/26 | 40,501 |
| 3/26 | 52,498 |
| 4/26 | 56,664 |
| 5/26 | 64,382 |
| 6/26 | 60,170 |
| 7/26 | 63,492 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| GoJet Airlines LLC d/b/a United Express G7 | 4,073 | 169,462 | 83% | scheduled passenger service |
| SkyWest Airlines Inc. OO | 1,565 | 83,667 | 81% | scheduled passenger service |
| Envoy Air MQ | 1,526 | 84,500 | 79% | scheduled passenger service |
| United Air Lines Inc. UA | 1,136 | 120,712 | 70% | charter passenger service, scheduled passenger service |
| American Airlines Inc. AA | 1,041 | 102,341 | 67% | scheduled passenger service |
| Republic Airline YX | 848 | 50,855 | 80% | scheduled passenger service |
| Southwest Airlines Co. WN | 5 | 643 | 77% | scheduled passenger service |
| Delta Air Lines Inc. DL | 5 | 492 | 63% | scheduled passenger service |
| Alaska Airlines Inc. AS | 4 | 493 | 71% | scheduled passenger service |
| Sun Country Airlines d/b/a MN Airlines SY | 3 | 160 | 29% | charter passenger service |
| Spirit Air Lines NK | 2 | 236 | 52% | scheduled passenger service |
| Lufthansa German Airlines LH | 2 | 496 | 93% | scheduled passenger service |
| PSA Airlines Inc. OH | 2 | 110 | 85% | scheduled passenger service |
| United Parcel Service 5X | 1 | 0 | scheduled cargo service | |
| Endeavor Air Inc. 9E | 1 | 65 | 93% | scheduled passenger service |
| Air Canada AC | 1 | 64 | 43% | scheduled passenger service |
| Aeromexico AM | 1 | 133 | 80% | scheduled passenger service |
| Jazz Aviation LP QK | 1 | 69 | 91% | scheduled passenger service |
| Atlas Air Inc. 5Y | 1 | 0 | charter cargo service | |
| Federal Express Corporation FX | 1 | 0 | scheduled cargo service | |
| Aeroenlaces Nacionales, S.A. de C.V. d/b/a VivaAerobus VB | 1 | 166 | 89% | scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Bombardier CRJ550 | 4,165 | 50 | 173,118 |
| Embraer ERJ-175 | 1,720 | 76 | 102,246 |
| Canadair RJ-700 | 1,156 | 65 | 61,151 |
| Airbus Industrie A319 | 1,003 | 127 | 92,066 |
| Embraer-Emb-170 | 964 | 66 | 51,777 |
| Boeing 737-800 | 434 | 170 | 50,498 |
| Boeing B737 Max 800 | 227 | 169 | 25,223 |
| Airbus Industrie A320-100/200 | 200 | 150 | 20,750 |
| Boeing 737-900ER | 162 | 179 | 18,048 |
| Boeing B737 Max 900 | 68 | 179 | 7,631 |
| Airbus Industrie A321Neoxlr | 38 | 190 | 3,839 |
| Airbus Industrie A321-200n | 32 | 199 | 4,109 |
| Boeing 737-700/700LR/Max 7 | 32 | 126 | 2,958 |
| Canadair RJ-200ER /RJ-440 | 9 | 50 | 302 |
| Boeing 757-300 | 2 | 234 | 318 |
| Canadair CRJ 900 | 2 | 73 | 134 |
| Airbus Industrie A300-600/R/CF/RCF | 1 | 0 | 0 |
| Airbus Industrie A340-300 | 1 | 279 | 264 |
| Boeing 757-200 | 1 | 72 | 0 |
| Boeing 767-300/300ER | 1 | 0 | 0 |
| Airbus Industrie A330-200 | 1 | 255 | 232 |
| Boeing 747-400 | 1 | 0 | 0 |
STL → ORD this direction alone · flown January 2025 to July 2026
5,172 flights of 5,241 scheduled, 309,884 passengers in 411,633 seats, 127,082 pounds of freight, 5,121 pounds of mail. GoJet Airlines LLC d/b/a United Express 2,046; SkyWest Airlines Inc. 783; Envoy Air 763; United Air Lines Inc. 582; American Airlines Inc. 551; Republic Airline 424; Southwest Airlines Co. 5; Alaska Airlines Inc. 4; Delta Air Lines Inc. 3; Spirit Air Lines 2; Sun Country Airlines d/b/a MN Airlines 2; United Parcel Service 1; Endeavor Air Inc. 1; Air Canada 1; Aeromexico 1; Lufthansa German Airlines 1; PSA Airlines Inc. 1; Jazz Aviation LP 1.
ORD → STL this direction alone · flown January 2025 to July 2026
5,048 flights of 5,172 scheduled, 304,780 passengers in 395,296 seats, 79,345 pounds of freight, 3,423 pounds of mail. GoJet Airlines LLC d/b/a United Express 2,027; SkyWest Airlines Inc. 782; Envoy Air 763; United Air Lines Inc. 554; American Airlines Inc. 490; Republic Airline 424; Delta Air Lines Inc. 2; Atlas Air Inc. 1; Federal Express Corporation 1; Lufthansa German Airlines 1; PSA Airlines Inc. 1; Sun Country Airlines d/b/a MN Airlines 1; Aeroenlaces Nacionales, S.A. de C.V. d/b/a VivaAerobus 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 Chicago O'Hare International ORD; all routes.