Chicago to Buffalo (ORD-BUF): nonstop upgrade & award space

United Airlines and American Airlines fly nonstop between Chicago (ORD) and Buffalo (BUF), roughly 58 times a week. The timetable below shows the nonstop scheduled at 1h 35m to 1h 52m for the 472 miles. 2LNR checks confirmed upgrade and award space on American Airlines flights on this route, so you can see which departures have space before you book.

Schedule last confirmed . Departure times come from 2LNR's schedule data; confirm with the airline before you book.

Updated .

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58
Flights a week, 4-week average
1h 35m to 1h 52m
Scheduled flight time
472 mi
Nonstop distance
Free
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Chicago to Buffalo flight schedule

Scheduled nonstop departures for ORD to BUF starting October 22, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.

Schedule data dated .

Scheduled nonstop departures from Chicago (ORD) to Buffalo (BUF)
Date Flight Airline Departs ORD Arrives BUF Duration Aircraft
UA 265United Airlines06:5009:291h 39mAirbus A320
AA 4780American Airlines08:0310:531h 50mEmbraer E175
UA 5275United Airlines10:2513:111h 46mCR5
UA 4382United Airlines10:3513:101h 35mCR5
AA 4076American Airlines13:1015:521h 42mEmbraer E175
UA 580United Airlines14:0016:431h 43mBoeing 737-700
AA 2921American Airlines14:2017:081h 48mAirbus A319
UA 1335United Airlines18:0020:471h 47mAirbus A320
AA 564American Airlines21:1623:591h 43mBoeing 737-800
UA 265United Airlines06:5009:291h 39mAirbus A320
AA 4780American Airlines08:0310:531h 50mEmbraer E175
UA 5275United Airlines10:2513:111h 46mCR5
UA 4382United Airlines10:3513:101h 35mCR5
AA 4076American Airlines13:1015:521h 42mEmbraer E175
UA 580United Airlines14:0016:431h 43mBoeing 737-700
AA 2921American Airlines14:2017:081h 48mAirbus A319
UA 1335United Airlines18:0020:471h 47mAirbus A320
AA 564American Airlines21:1623:591h 43mBoeing 737-800
UA 265United Airlines06:5009:291h 39mAirbus A320
AA 3664American Airlines08:0310:451h 42mEmbraer E175
UA 4429United Airlines10:2513:111h 46mCR5
UA 5275United Airlines10:2513:111h 46mCR5
UA 4382United Airlines10:3513:101h 35mCR5
AA 4076American Airlines13:1015:521h 42mEmbraer E175
UA 580United Airlines14:0016:431h 43mBoeing 737-700
AA 2921American Airlines14:2017:081h 48mAirbus A319
UA 1335United Airlines18:0020:471h 47mAirbus A320
AA 564American Airlines21:1623:591h 43mBoeing 737-800
UA 4177United Airlines06:2909:211h 52mCR5
AA 3664American Airlines08:0710:491h 42mEmbraer E175
UA 4382United Airlines10:3513:101h 35mCR5
AA 4076American Airlines13:1015:521h 42mEmbraer E175
UA 2226United Airlines14:1216:471h 35mBoeing 737-800
AA 2921American Airlines14:2017:081h 48mAirbus A319
UA 1335United Airlines18:0020:471h 47mAirbus A320
AA 564American Airlines21:1623:591h 43mBoeing 737-800
UA 4177United Airlines06:2909:211h 52mCR5
AA 3664American Airlines08:0710:491h 42mEmbraer E175
UA 4382United Airlines10:3513:101h 35mCR5
AA 4076American Airlines13:1015:521h 42mEmbraer E175

Showing the first 40 of 60 scheduled ORD to BUF departures across 7 days with service, starting October 22, 2026. Every remaining date is on the interactive map.

Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure.

See every ORD to BUF date on the interactive map

Aircraft on the Chicago to Buffalo nonstop

In the schedule table on this page, United Airlines flies the Bombardier CRJ, the Airbus A320, the Boeing 737-700, and the Boeing 737-800, and American Airlines flies the Embraer E175, the Airbus A319, and the Boeing 737-800. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure.

Confirmed upgrade & award space on ORD to BUF departures

2LNR tracks confirmed upgrade and award space on American Airlines, segment by segment and date by date. Open the calendar for Chicago to Buffalo to see which departures have space, the next 14 days free on every product and the full horizon on Pro.

American Airlines award space was open on 11 of the 14 Chicago to Buffalo departure dates from October 19 to November 1 that 2LNR checked in the 7 days to October 19, 2026.

See real availability

Confirmed upgrade or award seats by date on the ORD to BUF departures 2LNR tracks, checked against live inventory so you know what's open before you book.

Set an alert

Premium inventory turns over fast. Watch this route on Pro and 2LNR notifies you when space appears on a date you're tracking.

Plan on the map

See ORD to BUF on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Chicago to Buffalo nonstop

Carriers operating ORD to BUF nonstop in the current schedule. Where 2LNR tracks the carrier, its departures show confirmed upgrade or award space by date.

See ORD to BUF on the interactive map →

Frequently asked questions about ORD to BUF

How long is the flight from Chicago (ORD) to Buffalo (BUF)?
Scheduled flight times from Chicago (ORD) to Buffalo (BUF) run from 1h 35m to 1h 52m across the departures in the schedule table on this page. The nonstop covers about 472 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book.
Which airlines fly nonstop from ORD to BUF?
United Airlines and American Airlines fly ORD to BUF nonstop. 2LNR tracks confirmed upgrade and award space on American Airlines.
How many flights a week are there from ORD to BUF?
About 58 nonstop flights a week run between Chicago (ORD) and Buffalo (BUF) in the current schedule, operated by United Airlines and American Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next.
What time do flights from ORD to BUF depart?
Scheduled ORD to BUF nonstops in the next 7 days with service leave between 06:29 and 21:16, local time at Chicago. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
Which flights operate ORD to BUF nonstop?
The schedule table on this page lists 13 flight numbers for ORD to BUF nonstops, including UA 265, UA 580, UA 1335, UA 4382, and UA 5275 on United Airlines, and AA 564, AA 2921, and AA 4076 on American Airlines. The table lists each departure by date with its times and aircraft.
How do I check upgrade or award availability on ORD to BUF?
Open the ORD to BUF route on the interactive map or the matrix to see confirmed upgrade and award space by date on American Airlines, the next 14 days free and the full horizon on Pro. On Pro you can also set an alert on the route and 2LNR notifies you when space opens.

Never miss ORD to BUF upgrade or award space

See what's open by date on this route, the next 14 days free on every product and the full horizon on Pro.

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