Chicago (ORD) to Buffalo (BUF) flights
United Airlines, SkyWest Airlines, American Airlines, Republic Airline, GoJet Airlines fly nonstop from Chicago O'Hare International Airport to Buffalo Niagara International Airport, with about 54 flights a week in July 2026. The 474-mile flight takes about 1h 41m gate to gate.
- Distance
- 474 mi · 763 km
- Flight time
- 1h 41m
- Airlines
- 5
- Seats filled
- 76%
Airlines flying ORD to BUF
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 14 | Airbus A319, Boeing 737-900ER, Boeing 737-800 | 69,820 | 1h 40m |
| SkyWest Airlines | 13 | Embraer E175, Bombardier CRJ550, Bombardier CRJ700 | 19,931 | 1h 48m |
| American Airlines | 13 | Airbus A319, Boeing 737-800, Boeing 737 MAX 8 | 43,985 | 1h 35m |
| Republic Airline | 7 | Embraer E175, Embraer E170 | 21,455 | 1h 42m |
| GoJet Airlines | 7 | Bombardier CRJ550 | 14,816 | 1h 41m |
| Envoy AirSeasonal or ended | n/a | Embraer E175, Embraer E170 | 20,327 | 1h 39m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
ORD to BUF flight schedule
13 flight numbers flew this route in August 2026, 7 of them almost daily. The first usually leaves at 6:46am and the last at 9:19pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| AA 4413American Airlines · operated by Republic Airline | 6:46am | 9:37am | 4 | 95% |
| UA 265United Airlines | 6:49am | 9:28am | 21 | 100% |
| AA 4480American Airlines · operated by Republic Airline | 6:50am | 9:39am | 27 | 82% |
| UA 2753United Airlines | 7:15am | 10:00am | 10 | 83% |
| UA 4382United Airlines · operated by GoJet Airlines | 10:25am | 1:13pm | 10 | 71% |
| UA 4534United Airlines · operated by GoJet Airlines | 10:25am | 1:16pm | 21 | 52% |
| AA 4913American Airlines · operated by SkyWest Airlines | 1:25pm | 4:14pm | 4 | 65% |
| UA 2226United Airlines | 2:07pm | 4:56pm | 31 | 78% |
| AA 564American Airlines | 2:19pm | 5:04pm | 30 | 55% |
| UA 1335United Airlines | 6:15pm | 9:07pm | 21 | 67% |
| UA 5763United Airlines · operated by SkyWest Airlines | 6:17pm | 9:08pm | 10 | 53% |
| AA 4474American Airlines · operated by Republic Airline | 9:10pm | 12:02am | 27 | 48% |
| AA 403American Airlines | 9:19pm | 11:59pm | 4 | 35% |
Is ORD to BUF on time?
From September 2025 to August 2026, 70% of 2,554 flights arrived within 15 minutes of schedule and 3.1% were cancelled. Flights leaving around 7am were the most punctual (84%), those around 9pm the least (43%). Most delay time was caused by late-arriving aircraft (53%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 1,319 | 71% | 26 min | 2.7% |
| American Airlines | 1,235 | 69% | 24 min | 3.5% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 6am to 7am | 125 | 93% | |
| 7am to 8am | 266 | 84% | |
| 8am to 9am | 147 | 84% | |
| 9am to 10am | 63 | 79% | |
| 10am to 11am | 364 | 67% | |
| 11am to 12pm | 78 | 78% | |
| 1pm to 2pm | 304 | 73% | |
| 2pm to 3pm | 379 | 72% | |
| 6pm to 7pm | 368 | 62% | |
| 7pm to 8pm | 105 | 62% | |
| 8pm to 9pm | 130 | 53% | |
| 9pm to 10pm | 134 | 43% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 209 | 21,185 | |
| September 2025 | 208 | 20,959 | |
| October 2025 | 213 | 18,355 | |
| November 2025 | 209 | 11,363 | |
| December 2025 | 188 | 12,365 | |
| January 2026 | 171 | 9,615 | |
| February 2026 | 164 | 9,798 | |
| March 2026 | 179 | 11,827 | |
| April 2026 | 218 | 14,667 | |
| May 2026 | 244 | 19,725 | |
| June 2026 | 234 | 19,648 | |
| July 2026 | 238 | 20,960 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.