Direct (nonstop) flights from Buffalo to Denver
2 airlines fly nonstop from Buffalo Niagara International (BUF) to Denver International (DEN). It's 1,359 miles (2,187 km), about 3h 35m in the air. Operated by United Airlines, Southwest Airlines.
United Airlines
Southwest Airlines
Route data last updated: May 31, 2026
Airlines with non-stop flights
UA
United Airlines
WN
Southwest Airlines
Alternative Routes
Other ways to fly from Buffalo to Denver with one stop · direct emits 230 kg CO₂ per passenger
Looking for the return flight?
DEN → BUF: Flights from Denver to BuffaloOther direct flights from Buffalo
Direct flights from Denver (DEN)
Frequently Asked Questions
How long is the direct flight from Buffalo to Denver?
A nonstop flight from Buffalo (BUF) to Denver (DEN) takes approximately 3 hours and 35 minutes. The distance is 1,359 miles (2,187 km).
Which airlines fly nonstop from Buffalo to Denver?
2 airlines: United Airlines, Southwest Airlines.
Is there a nonstop flight from Buffalo to Denver?
Yes. 2 airlines: United Airlines, Southwest Airlines.
How far is Buffalo from Denver?
The flight distance from Buffalo to Denver is 1,359 miles (2,187 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as New York to Miami.
What type of aircraft flies from Buffalo to Denver?
At 3h 35m, this route typically uses narrow-body or mid-range jets — Boeing 737 MAX or Airbus A320neo. Varies by airline.
What is the carbon footprint of a flight from Buffalo to Denver?
Roughly 230 kg CO2 per passenger one-way. That's about the same as driving 1,150 km.
Is the return flight from Denver to Buffalo also nonstop?
Yes — nonstop flights run both ways. Flight time may differ slightly due to wind patterns.
When is the cheapest time to fly from Buffalo to Denver?
Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. 3-6 weeks ahead is a good window for this route. Use "Check Prices" above to compare.
How early should I arrive at Buffalo Niagara International for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.