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Find low faresSouthwest® flights from Buffalo/Niagara Falls to Denver from $183
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1 Passenger
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Low fares from Buffalo/Niagara Falls to Denver
$
Buffalo/Niagara Falls (BUF)to
Denver (DEN)
Depart: 04/25/2026
One-way
Basic
From
$183
Seen: 8 hrs ago
Buffalo/Niagara Falls (BUF)to
Denver (DEN)
Depart: 03/02/2026
One-way
Basic
From
$209
Seen: 12 hrs ago
Buffalo/Niagara Falls (BUF)to
Denver (DEN)
Depart: 03/19/2026
One-way
Basic
From
$219
Seen: 10 hrs ago
Buffalo/Niagara Falls (BUF)to
Denver (DEN)
Depart: 03/04/2026
One-way
Basic
From
$219
Seen: 7 hrs ago
Buffalo/Niagara Falls (BUF)to
Denver (DEN)
Depart: 03/03/2026
One-way
Basic
From
$219
Seen: 7 hrs ago
Buffalo/Niagara Falls (BUF)to
Denver (DEN)
Depart: 03/17/2026
One-way
Basic
From
$219
Seen: 6 hrs ago
Explore flights from Buffalo/Niagara Falls to Denver
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Flight Details
Departing from:
Buffalo Niagara International Airport
Arriving at:
Denver International Airport
Average flight time:
3 hours 39 minutes
Distance:
1359 miles
Route Information
156† Weekly flights
- 1‡ Nonstop flight per day Monday through Friday
- 1‡ Nonstop flight on Saturday
- 1‡ Nonstop flight on Sunday
† Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.
‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.
Questions we hear the most
The average flight time from Buffalo/Niagara Falls to Denver is 3 hours 39 minutes.
There are 156 weekly flights from Buffalo/Niagara Falls to Denver on Southwest Airlines.
Yes, Southwest flies nonstop from Buffalo/Niagara Falls to Denver once per day from Monday through Friday.
Yes, Southwest flies nonstop from Buffalo/Niagara Falls to Denver once per day on Saturdays and Sundays.
To find the lowest fares by day and time to fly Buffalo/Niagara Falls to Denver with Southwest, check out our Low Fare Calendar.
You can rent a car at Denver International Airport book yours with your flight.
Yes! Flights from Buffalo/Niagara Falls to Denver—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
Check the status of your upcoming Southwest flight.
Check out the Southwest Airlines® Help Center for answers about everything Southwest.