Denver to Buffalo (DEN-BUF): nonstop flights and who flies them

United Airlines flies the DEN to BUF nonstop about 7 times a week. In the timetable below it flies as UA 731, scheduled at 3h 12m for the 1,356 miles.

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

Updated .

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7
Flights a week, 4-week average
3h 12m
Scheduled flight time
1,356 mi
Nonstop distance
Free
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Denver to Buffalo flight schedule

Scheduled nonstop departures for DEN 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 Denver (DEN) to Buffalo (BUF)
Date Flight Airline Departs DEN Arrives BUF Duration Aircraft
UA 731United Airlines17:3122:433h 12mBoeing 737-800
UA 731United Airlines17:3122:433h 12mBoeing 737-800
UA 731United Airlines17:3122:433h 12mBoeing 737-800
UA 731United Airlines17:3122:433h 12mBoeing 737-800
UA 731United Airlines17:3122:433h 12mBoeing 737-800
UA 731United Airlines17:3122:433h 12mBoeing 737-800
UA 731United Airlines17:3122:433h 12mBoeing 737-800

Showing all 7 scheduled DEN to BUF departures across 7 days with service, starting October 22, 2026. Later dates are 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 DEN to BUF date on the interactive map

Aircraft on the Denver to Buffalo nonstop

United Airlines flies the Boeing 737-800 on every departure in the schedule table on this page. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure.

The full DEN to BUF nonstop schedule

This page carries the full DEN to BUF nonstop schedule, who operates each departure and how often it runs; the reverse direction is linked below.

See the schedule

Who operates each DEN to BUF nonstop and how often it runs, from 2LNR's schedule data.

Plan on the map

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

Airlines flying Denver to Buffalo nonstop

Carriers operating DEN to BUF nonstop in the current schedule.

See DEN to BUF on the interactive map →

Frequently asked questions about DEN to BUF

How long is the flight from Denver (DEN) to Buffalo (BUF)?
UA 731 is scheduled at 3h 12m from Denver (DEN) to Buffalo (BUF) on every departure in the schedule table on this page. The nonstop covers about 1,356 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book.
Which airlines fly nonstop from DEN to BUF?
United Airlines is currently the only airline flying DEN to BUF nonstop. 2LNR doesn't show award or upgrade space for it on DEN to BUF, so this page carries the schedule rather than a space claim.
How many flights a week are there from DEN to BUF?
About 7 nonstop flights a week run between Denver (DEN) and Buffalo (BUF) in the current schedule, operated by United Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next.
What time do flights from DEN to BUF depart?
In the next 7 days with service, every scheduled DEN to BUF nonstop leaves at 17:31 local time at Denver. The schedule table on this page lists each departure by date.
Which flights operate DEN to BUF nonstop?
United Airlines flies UA 731 nonstop from Denver (DEN) to Buffalo (BUF), the only flight number in the schedule table on this page. The table lists each date with its departure and arrival times and aircraft.
Does 2LNR show upgrade or award space on DEN to BUF?
Not on this route: 2LNR doesn't show award or upgrade space for United Airlines on DEN to BUF. The page carries the full DEN to BUF nonstop schedule and who flies each departure, and the reverse direction is linked below.

See the full DEN to BUF nonstop schedule

Every scheduled departure on this route, with who flies it. 2LNR shows upgrade and award space by date on the carriers it tracks, the next 14 days free on every product and the full horizon on Pro.

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