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

United Airlines and American Airlines fly nonstop between Buffalo (BUF) and Chicago (ORD), roughly 92 times a week. With this many departures on a short sector, premium cabins are small and turn over daily, so upgrade or award space opens and closes within hours. 2LNR tracks confirmed upgrade and award space on American Airlines, on every BUF to ORD departure, so you know which flights have space before you book.

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

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92
Nonstop flights a week
472 mi
Nonstop distance
Free
To get started

Buffalo to Chicago flight schedule

Scheduled nonstop departures for BUF to ORD, last checked against our schedule feed on September 6, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.

Schedule data dated .

Scheduled nonstop departures from Buffalo (BUF) to Chicago (ORD)
Date Flight Airline Departs BUF Arrives ORD Duration Aircraft
AA 4411American Airlines05:1106:051h 54mE75
UA 543United Airlines07:0008:002h73G
AA 4512American Airlines07:3308:482h 15mE75
AA 4480American Airlines10:3011:352h 5mE75
UA 323United Airlines10:3011:291h 59m738
UA 324United Airlines10:3011:291h 59m738
UA 705United Airlines10:5711:572h319
AA 4751American Airlines12:1813:282h 10mE75
UA 4381United Airlines13:5414:552h 1mCR5
UA 5397United Airlines13:5615:002h 4mCR5
UA 3459United Airlines13:5915:052h 6mE7W
UA 2747United Airlines17:5819:002h 2m738
AA 1195American Airlines18:0919:272h 18m319
AA 856American Airlines18:5620:152h 19m319
AA 4411American Airlines05:1106:051h 54mE75
UA 543United Airlines06:3007:302h738
AA 4480American Airlines10:3011:352h 5mE75
UA 323United Airlines10:3011:291h 59m738
UA 324United Airlines10:3011:291h 59m738
UA 705United Airlines10:5711:572h319
AA 4751American Airlines12:0913:192h 10mE75
UA 4533United Airlines13:5114:552h 4mCR5
UA 4381United Airlines13:5414:552h 1mCR5
UA 4585United Airlines13:5615:002h 4mCR5
UA 2747United Airlines17:5819:002h 2m738
AA 1195American Airlines18:0919:272h 18m319
AA 856American Airlines18:5620:152h 19m319
AA 4411American Airlines05:1106:051h 54mE75
UA 543United Airlines06:5507:552h738
AA 4480American Airlines10:3011:352h 5mE75
UA 323United Airlines10:3011:291h 59m738
UA 324United Airlines10:3011:291h 59m738
UA 705United Airlines10:5711:572h319
AA 4751American Airlines12:0913:192h 10mE75
UA 4533United Airlines13:5114:552h 4mCR5
UA 4381United Airlines13:5414:552h 1mCR5
UA 4585United Airlines13:5615:002h 4mCR5
UA 2747United Airlines17:5819:002h 2m738
AA 1195American Airlines18:0919:272h 18m319
AA 856American Airlines18:5620:152h 19m319

Showing the first 40 of 90 scheduled BUF to ORD departures across the next 7 days with service. 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 has not filed that value in the schedule data we hold. Aircraft are IATA equipment codes as filed, and can change up to departure.

See every BUF to ORD date on the interactive map

Confirmed upgrade & award space on BUF to ORD departures

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

See real availability

Confirmed upgrade and award seats on each BUF to ORD departure, checked against live inventory so you know what is open before you book.

Set an alert

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

Plan on the map

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

Airlines flying Buffalo to Chicago nonstop

Carriers operating BUF to ORD nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

See BUF to ORD on the interactive map →

Frequently asked questions about BUF to ORD

How far is Chicago from Buffalo?
BUF to ORD covers about 472 miles nonstop. Flight times vary by aircraft and season; the schedule table on this page lists each scheduled departure with its own times.
Which airlines fly nonstop from BUF to ORD?
United Airlines and American Airlines fly the route nonstop. 2LNR tracks confirmed upgrade and award space on American Airlines.
How many flights a week are there from BUF to ORD?
About 92 nonstop flights a week run between Buffalo and Chicago 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 BUF to ORD depart?
Scheduled BUF to ORD nonstops in the next 7 days with service leave between 05:11 and 18:56, local time at Buffalo. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
How do I check upgrade or award availability on BUF to ORD?
Open the BUF to ORD 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 BUF to ORD upgrade or award space

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

Get started free