$74 Cheap Flights from Buffalo (BUF) to Denver (DEN)

View $74 flight on Fri, Jun 6, 2025Opens in a new window

Popular airlines from Buffalo Niagara Intl. Airport (BUF) to Denver Intl. Airport (DEN)

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Find available prices by choosing your travel dates.

Cheap Flights from Buffalo to Denver (BUF-DEN)

Prices were available within the past 7 days and start at $74 for one-way flights and $148 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Fri, Jun 6 - Mon, Jun 9
BUF
Buffalo
DEN
Denver
$148 Roundtrip, found 5 hours ago
$148
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Fri, Jun 6 from Buffalo to Denver, returning Mon, Jun 9, priced at $148 found 5 hours ago
Frontier Airlines
Fri, Jun 6 - Fri, Jun 13
BUF
Buffalo
DEN
Denver
$168 Roundtrip, found 4 hours ago
$168
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Fri, Jun 6 from Buffalo to Denver, returning Fri, Jun 13, priced at $168 found 4 hours ago
Frontier Airlines
Fri, Jun 13 - Fri, Jun 20
BUF
Buffalo
DEN
Denver
$188 Roundtrip, found 1 day ago
$188
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Jun 13 from Buffalo to Denver, returning Fri, Jun 20, priced at $188 found 1 day ago
Frontier Airlines
Fri, Jun 6 - Wed, Jun 18
BUF
Buffalo
DEN
Denver
$189 Roundtrip, found 2 days ago
$189
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Fri, Jun 6 from Buffalo to Denver, returning Wed, Jun 18, priced at $189 found 2 days ago
Frontier Airlines
Fri, Jun 6 - Sun, Jun 8
BUF
Buffalo
DEN
Denver
$193 Roundtrip, found 3 hours ago
$193
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Fri, Jun 6 from Buffalo to Denver, returning Sun, Jun 8, priced at $193 found 3 hours ago
Southwest Airlines
Wed, Jun 4 - Mon, Jun 9
BUF
Buffalo
DEN
Denver
$194 Roundtrip, found 9 hours ago
$194
Roundtrip
found 9 hours ago
Select Southwest Airlines flight, departing Wed, Jun 4 from Buffalo to Denver, returning Mon, Jun 9, priced at $194 found 9 hours ago
Frontier Airlines
Fri, May 30 - Fri, Jun 6
BUF
Buffalo
DEN
Denver
$199 Roundtrip, found 12 hours ago
$199
Roundtrip
found 12 hours ago
Select Frontier Airlines flight, departing Fri, May 30 from Buffalo to Denver, returning Fri, Jun 6, priced at $199 found 12 hours ago
United
Tue, Aug 5 - Mon, Aug 11
BUF
Buffalo
DEN
Denver
$213 Roundtrip, found 8 hours ago
$213
Roundtrip
found 8 hours ago
Select United flight, departing Tue, Aug 5 from Buffalo to Denver, returning Mon, Aug 11, priced at $213 found 8 hours ago
Sun Country Airlines
Fri, Jun 27 - Tue, Jul 1
BUF
Buffalo
DEN
Denver
$230 Roundtrip, found 2 days ago
$230
Roundtrip
found 2 days ago
Select Sun Country Airlines flight, departing Fri, Jun 27 from Buffalo to Denver, returning Tue, Jul 1, priced at $230 found 2 days ago
JetBlue Airways
Tue, Jun 10 - Fri, Jun 13
BUF
Buffalo
DEN
Denver
$233 Roundtrip, found 1 day ago
$233
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Tue, Jun 10 from Buffalo to Denver, returning Fri, Jun 13, priced at $233 found 1 day ago
Flights from Buffalo (BUF) to Denver (DEN)
Origin airport
Buffalo Niagara Intl.
Destination airport
Denver Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$148
Distance
1355 mi

Buffalo to Denver Flights

The cheapest times to fly from Buffalo to Denver

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Buffalo to Denver are during the month of June. You can find some of the cheapest flights from Buffalo to Denver with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Buffalo to Denver

Sunday is one of the best days to book for cheap flights from Buffalo to Denver: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Buffalo to Denver

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Buffalo to Denver in 2025. You can also book with separate airlines for your outbound and return journeys, from $74 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Buffalo to Denver flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Buffalo to Denver airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Buffalo Niagara Intl. Airport (BUF) to Denver Intl. Airport (DEN) cost?
Cheap round-trip fares from Buffalo Niagara Intl. Airport (BUF) to Denver Intl. Airport (DEN) start from $168. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Frontier Airlines flight leaving BUF on May 3 2025 and touching down at DEN. The price was last updated on April 23 2025 and has not changed since.
What is the cheapest month to fly from BUF to DEN?
The cheapest flights from BUF to DEN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Buffalo Niagara Intl. Airport (BUF) to Denver Intl. Airport (DEN)?
When flying out of Buffalo Niagara Intl. Airport (BUF), you can catch a nonstop flight to Denver Intl. Airport (DEN) with Southwest Airlines.
What is the cheapest airline that flies from BUF to DEN?
Take off from BUF to DEN with Frontier Airlines. This airline currently offers the lowest one-way fare on this route, starting at $74. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from BUF on June 6 2025. Prices were last updated on April 23 2025 and have not changed since.
How many flights per day from Buffalo Niagara Intl. Airport (BUF) to Denver Intl. Airport (DEN)?
On average, you can take your pick of 4 direct flights flying from Buffalo Niagara Intl. Airport (BUF) to Denver Intl. Airport (DEN) per week. If you can’t find one that fits your schedule, think about a flight that includes a layover. Filter your search on Expedia to include one stop or more and opt for the best alternative.
What are the most popular departure times for flights from Buffalo Niagara Intl. Airport (BUF) to Denver Intl. Airport (DEN)?
Flights between BUF and DEN are their busiest at 7 AM. If you’d like a more relaxed atmosphere and possibly cheaper prices, look for a time when demand is lower.
What day of the week has the most flights from BUF to DEN?
Travel on a Friday if you’re looking for the best selection of flights from Buffalo Niagara Intl. Airport (BUF) to Denver Intl. Airport (DEN).
What is the earliest flight from Buffalo Niagara Intl. Airport (BUF) to Denver Intl. Airport (DEN)?
Buffalo Niagara Intl. Airport (BUF)’s first flight to Denver Intl. Airport (DEN) takes off at approximately 7:15AM UTC-5. With a total flight time of 3h 55m, you’ll arrive at around 9:10AM UTC-7.
How long does it take to fly from Buffalo Niagara Intl. Airport (BUF) to Denver Intl. Airport (DEN)?
The average flight duration from BUF to DEN is 3 hours and 54 minutes, covering a total distance of 1,350 mi.
What is the best time to fly from Buffalo Niagara Intl. Airport (BUF) to Denver Intl. Airport (DEN)?
To avoid potential delays on the Buffalo Niagara Intl. Airport (BUF) to Denver Intl. Airport (DEN) route, travel before 3 PM. Later flights have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for Denver from Buffalo Niagara Intl. Airport (BUF)?
If you’re traveling on a direct flight from Buffalo Niagara Intl. Airport (BUF) to Denver, Denver Intl. Airport (DEN) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Buffalo Niagara Intl. Airport (BUF) to Denver Intl. Airport (DEN) last-minute?
Booking your ticket from BUF to DEN shortly before your trip is generally more expensive. But if you’re flexible with your schedule, you could bag a cheap last-minute fare.
Is it cheaper to book a BUF to DEN flight and hotel package?
Compared with arranging flights and hotels separately, booking a BUF to DEN flight and hotel package with Expedia could result in significant savings. Better still, having everything in one place takes the hassle out of planning your trip. Simply pick your flights and choose from our extensive range of stays, then customize your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Buffalo Niagara Intl. Airport (BUF) to Denver Intl. Airport (DEN)?
If you reserved your BUF to DEN flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for further details.

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*Available to One Key members.