Direct (nonstop) flights from Denver to Buffalo
2 airlines fly nonstop from Denver International (DEN) to Buffalo Niagara International (BUF). It's 1,359 miles (2,187 km), about 3h 13m in the air. Operated by United Airlines, Southwest Airlines.
United Airlines
Southwest Airlines
Route data last updated: May 26, 2026
Airlines with non-stop flights
UA
United Airlines
WN
Southwest Airlines
Alternative Routes
Other ways to fly from Denver to Buffalo with one stop · direct emits 230 kg CO₂ per passenger
Looking for the return flight?
BUF → DEN: Flights from Buffalo to DenverOther direct flights from Denver
Direct flights from Buffalo (BUF)
Frequently Asked Questions
How long is the direct flight from Denver to Buffalo?
A nonstop flight from Denver (DEN) to Buffalo (BUF) takes approximately 3 hours and 13 minutes. The distance is 1,359 miles (2,187 km).
Which airlines fly nonstop from Denver to Buffalo?
2 airlines: United Airlines, Southwest Airlines.
Is there a nonstop flight from Denver to Buffalo?
Yes. 2 airlines: United Airlines, Southwest Airlines.
How far is Denver from Buffalo?
The flight distance from Denver to Buffalo 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 Denver to Buffalo?
At 3h 13m, 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 Denver to Buffalo?
Roughly 230 kg CO2 per passenger one-way. That's about the same as driving 1,150 km.
Is the return flight from Buffalo to Denver 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 Denver to Buffalo?
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 Denver International for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.