Chicago O'Hare International ⇄ Buffalo Niagara International ORD–BUF
Airlines flew 4,981 flights between Chicago O'Hare International ORD in Chicago, IL and Buffalo Niagara International BUF in Buffalo, NY in the twelve months to July 2026, both directions together: 388,092 passengers in 503,597 seats, 77% of them filled, and 355,490 pounds of freight. 474 miles, about 67 minutes in the air, on 9 airlines: United Air Lines Inc. (1,171), American Airlines Inc. (932), Envoy Air (727), Republic Airline (725) and 5 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 | 282 |
| 2/25 | 281 |
| 3/25 | 361 |
| 4/25 | 481 |
| 5/25 | 537 |
| 6/25 | 466 |
| 7/25 | 478 |
| 8/25 | 420 |
| 9/25 | 419 |
| 10/25 | 428 |
| 11/25 | 425 |
| 12/25 | 376 |
| 1/26 | 345 |
| 2/26 | 330 |
| 3/26 | 356 |
| 4/26 | 434 |
| 5/26 | 493 |
| 6/26 | 467 |
| 7/26 | 488 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 18,572 |
| 2/25 | 19,425 |
| 3/25 | 24,753 |
| 4/25 | 30,230 |
| 5/25 | 37,963 |
| 6/25 | 38,676 |
| 7/25 | 45,641 |
| 8/25 | 42,547 |
| 9/25 | 42,100 |
| 10/25 | 37,516 |
| 11/25 | 24,142 |
| 12/25 | 24,928 |
| 1/26 | 20,265 |
| 2/26 | 19,915 |
| 3/26 | 23,210 |
| 4/26 | 29,574 |
| 5/26 | 39,728 |
| 6/26 | 39,970 |
| 7/26 | 44,197 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| United Air Lines Inc. UA | 1,171 | 140,914 | 79% | scheduled passenger service |
| American Airlines Inc. AA | 932 | 92,230 | 67% | scheduled passenger service |
| Envoy Air MQ | 727 | 42,032 | 81% | scheduled passenger service |
| Republic Airline YX | 725 | 44,080 | 80% | scheduled passenger service |
| SkyWest Airlines Inc. OO | 717 | 38,904 | 84% | scheduled passenger service |
| GoJet Airlines LLC d/b/a United Express G7 | 672 | 29,342 | 87% | scheduled passenger service |
| United Parcel Service 5X | 31 | 0 | scheduled cargo service | |
| Delta Air Lines Inc. DL | 5 | 457 | 66% | charter passenger service |
| JetBlue Airways B6 | 1 | 133 | 95% | scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Embraer ERJ-175 | 1,523 | 75 | 93,522 |
| Bombardier CRJ550 | 879 | 50 | 38,124 |
| Airbus Industrie A319 | 815 | 127 | 74,612 |
| Boeing 737-800 | 633 | 170 | 77,030 |
| Boeing 737-900ER | 311 | 179 | 43,976 |
| Embraer-Emb-170 | 295 | 65 | 14,491 |
| Boeing 737-700/700LR/Max 7 | 183 | 126 | 18,464 |
| Canadair RJ-700 | 132 | 65 | 7,778 |
| Airbus Industrie A320-100/200 | 94 | 150 | 10,781 |
| Boeing B737 Max 900 | 35 | 179 | 4,616 |
| Boeing B737 Max 800 | 26 | 170 | 3,044 |
| Airbus Industrie A300-600/R/CF/RCF | 20 | 0 | 0 |
| Canadair RJ-200ER /RJ-440 | 12 | 50 | 443 |
| Boeing 757-200 | 11 | 20 | 103 |
| Airbus Industrie A321Neoxlr | 4 | 190 | 534 |
| Boeing 767-300/300ER | 3 | 0 | 0 |
| Boeing 767-400/ER | 2 | 237 | 354 |
| Airbus Industrie A321-200n | 2 | 190 | 87 |
| A220-300 BD-500-1A11 | 1 | 140 | 133 |
ORD → BUF this direction alone · flown January 2025 to July 2026
2,477 flights of 2,527 scheduled, 190,697 passengers in 251,783 seats, 14,017 pounds of freight, 103 pounds of mail. United Air Lines Inc. 586; American Airlines Inc. 465; Envoy Air 365; SkyWest Airlines Inc. 362; Republic Airline 360; GoJet Airlines LLC d/b/a United Express 336; Delta Air Lines Inc. 2; JetBlue Airways 1.
BUF → ORD this direction alone · flown January 2025 to July 2026
2,504 flights of 2,556 scheduled, 197,395 passengers in 251,814 seats, 341,473 pounds of freight. United Air Lines Inc. 585; American Airlines Inc. 467; Republic Airline 365; Envoy Air 362; SkyWest Airlines Inc. 355; GoJet Airlines LLC d/b/a United Express 336; United Parcel Service 31; Delta Air Lines Inc. 3.
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: Chicago O'Hare International ORD and Buffalo Niagara International BUF; all routes.