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

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

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

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key
Find available prices by choosing your travel dates.

Cheap Flights from Denver to Buffalo (DEN-BUF)

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
DEN
Denver
BUF
Buffalo
$148 Roundtrip, just found
$148
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Jun 6 from Denver to Buffalo, returning Mon, Jun 9, priced at $148 just found
Frontier Airlines
Fri, Aug 8 - Fri, Aug 15
DEN
Denver
BUF
Buffalo
$188 Roundtrip, found 14 hours ago
$188
Roundtrip
found 14 hours ago
Select Frontier Airlines flight, departing Fri, Aug 8 from Denver to Buffalo, returning Fri, Aug 15, priced at $188 found 14 hours ago
American Airlines
Tue, May 27 - Fri, Jun 6
DEN
Denver
BUF
Buffalo
$193 Roundtrip, found 2 hours ago
$193
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Tue, May 27 from Denver to Buffalo, returning Fri, Jun 6, priced at $193 found 2 hours ago
American Airlines
Tue, May 27 - Fri, Jun 6
DEN
Denver
BUF
Buffalo
$195 Roundtrip, found 2 hours ago
$195
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Tue, May 27 from Denver to Buffalo, returning Fri, Jun 6, priced at $195 found 2 hours ago
Frontier Airlines
Fri, Jun 6 - Mon, Jun 9
DEN
Denver
BUF
Buffalo
$198 Roundtrip, just found
$198
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Jun 6 from Denver to Buffalo, returning Mon, Jun 9, priced at $198 just found
Frontier Airlines
Fri, May 30 - Fri, Jun 6
DEN
Denver
BUF
Buffalo
$199 Roundtrip, found 2 hours ago
$199
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Fri, May 30 from Denver to Buffalo, returning Fri, Jun 6, priced at $199 found 2 hours ago
Frontier Airlines
Fri, Aug 8 - Tue, Aug 12
DEN
Denver
BUF
Buffalo
$203 Roundtrip, found 1 hour ago
$203
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Aug 8 from Denver to Buffalo, returning Tue, Aug 12, priced at $203 found 1 hour ago
JetBlue Airways
Fri, Jun 6 - Mon, Jun 9
DEN
Denver
BUF
Buffalo
$213 Roundtrip, just found
$213
Roundtrip
just found
Select JetBlue Airways flight, departing Fri, Jun 6 from Denver to Buffalo, returning Mon, Jun 9, priced at $213 just found
United
Wed, Aug 6 - Tue, Aug 12
DEN
Denver
BUF
Buffalo
$217 Roundtrip, just found
$217
Roundtrip
just found
Select United flight, departing Wed, Aug 6 from Denver to Buffalo, returning Tue, Aug 12, priced at $217 just found
Delta
Tue, May 27 - Fri, Jun 6
DEN
Denver
BUF
Buffalo
$224 Roundtrip, found 2 hours ago
$224
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, May 27 from Denver to Buffalo, returning Fri, Jun 6, priced at $224 found 2 hours ago
Flights from Denver (DEN) to Buffalo (BUF)
Origin airport
Denver Intl.
Destination airport
Buffalo Niagara Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, Sun Country Airlines, United
Roundtrip price
$148
Distance
1355 mi

Denver to Buffalo Flights

The cheapest times to fly from Denver to Buffalo

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 Denver to Buffalo are during the month of June. You can find some of the cheapest flights from Denver to Buffalo with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Denver to Buffalo

Sunday is one of the best days to book for cheap flights from Denver to Buffalo: 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 Denver to Buffalo

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 Denver to Buffalo 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 Denver to Buffalo 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 Denver to Buffalo 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 Denver Intl. Airport (DEN) to Buffalo Niagara Intl. Airport (BUF) cost?
Pick up cheap return tickets starting from $188 from Denver Intl. Airport (DEN) to Buffalo Niagara Intl. Airport (BUF). 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 DEN on May 8 2025 and touching down at BUF. The price was last updated on April 24 2025 and has not changed since.
What is the cheapest month to fly from DEN to BUF?
The cheapest flights from DEN to BUF 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 Denver Intl. Airport (DEN) to Buffalo Niagara Intl. Airport (BUF)?
When setting off from Denver Intl. Airport (DEN), you can take a direct flight to Buffalo Niagara Intl. Airport (BUF) with Southwest Airlines.
What is the cheapest airline that flies from DEN to BUF?
Right now, the cheapest airline operating one-way flights from DEN to BUF is Frontier Airlines. You can jet off on this route from $74. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from DEN on June 6 2025. Prices were last updated on April 24 2025 and have not changed since.
How many flights per day from Denver Intl. Airport (DEN) to Buffalo Niagara Intl. Airport (BUF)?
On average, you can pick from 4 direct flights each week from Denver Intl. Airport (DEN) to Buffalo Niagara Intl. Airport (BUF). To expand your choices, consider taking a flight with a layover. Just enter your details on Expedia and then set the filter tool to include one or more stops.
What are the most popular departure times for flights from Denver Intl. Airport (DEN) to Buffalo Niagara Intl. Airport (BUF)?
More travelers fly between DEN and BUF at 6 PM than at any other time. Looking to skip the crowds? Consider flying outside peak hours and you could save on your fare as well.
What day of the week has the most flights from DEN to BUF?
If you jet off on a Sunday, you’ll get the largest range of choices for flights from Denver Intl. Airport (DEN) to Buffalo Niagara Intl. Airport (BUF).
What is the earliest flight from Denver Intl. Airport (DEN) to Buffalo Niagara Intl. Airport (BUF)?
The first flight of the day leaving Denver Intl. Airport (DEN) is at around 10:40AM UTC-7. Board this flight and you’ll touch down at Buffalo Niagara Intl. Airport (BUF) at approximately 3:40PM UTC-5. The total flight duration is 3h.
How long does it take to fly from Denver Intl. Airport (DEN) to Buffalo Niagara Intl. Airport (BUF)?
It takes approximately 3 hours to fly the 1,350 mi from DEN to BUF.
What is the best time to fly from Denver Intl. Airport (DEN) to Buffalo Niagara Intl. Airport (BUF)?
Select a flight from Denver Intl. Airport (DEN) to Buffalo Niagara Intl. Airport (BUF) that leaves before 3 PM to reduce the risk of cancellations. Departures after this hour are on average 22% more likely to be 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 Buffalo from Denver Intl. Airport (DEN)?
Compare your flight options from Denver Intl. Airport (DEN) to Buffalo Niagara Intl. Airport (BUF). This is the only Buffalo airport you can fly into if you’re taking a direct flight.
Is it cheaper to buy a plane ticket from Denver Intl. Airport (DEN) to Buffalo Niagara Intl. Airport (BUF) last-minute?
Booking your plane ticket from DEN to BUF just before your journey is generally more expensive. But if there’s some wiggle room with your departure dates and times, you could snag a cheap last-minute fare.
Is it cheaper to book a DEN to BUF flight and hotel package?
You can save money by securing a DEN to BUF flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it’s simple to manage everything in one place. After selecting your preferred accommodations and flights, consider adding extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Denver Intl. Airport (DEN) to Buffalo Niagara Intl. Airport (BUF)?
Usually, it’s possible to cancel or reschedule your DEN to BUF flight. However, if it’s been more than 24 hours since booking, additional charges may apply. Refer to your airline’s policies in your itinerary to see what changes are allowed and if any costs are involved. You’ll also find more information on our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.