BUF - DEN

C$ 145 Find Cheap Flights from Buffalo to Denver

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Buffalo to Denver departing on 27/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Denver

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Buffalo to Denver, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Buffalo to Denver, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
C$ 318
Typical prices: C$ 577-C$ 354
Frontier
Sun 7/6Thu 11/6
BUF - DEN • 1 stop
Cheapest direct flights
C$ 491
Typical prices: C$ 687-C$ 386
United Airlines
Tue 12/5Tue 19/5
BUF - DEN • Direct
Top airlines
Cheapest • from C$ 318 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Direct flights
You can fly direct with United Airlines and Southwest. Average duration is 3h 39m
Direct flights
Direct flights
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Direct flights
Direct flights
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Top layover airports
Cheapest • Avg C$ 353 (round-trip)
Shortest trip • 6h 15m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 3 weeks in advance save around 30% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 25% price drop
Most popular
Good to know
Good to know
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Good to know
Good to know
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Denver!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Buffalo to Denver (BUF-DEN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Buffalo to Denver that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Buffalo to Denver

Sun, 7 Jun - Thu, 11 Jun
Frontier Logo
8:49 p.m. - 3:12 p.m.
BUF
-
DEN
20h 23m
1 stop
Frontier Logo
6:03 a.m. - 8:17 p.m.
DEN
-
BUF
12h 14m
1 stop
C$ 318Frontier
Sat, 25 Apr - Wed, 29 Apr
Frontier Logo
1:11 p.m. - 10:29 p.m.
BUF
-
DEN
11h 18m
1 stop
Frontier Logo
11:59 p.m. - 12:12 p.m.
DEN
-
BUF
10h 13m
1 stop
C$ 322Frontier
Thu, 4 Jun - Tue, 9 Jun
Frontier Logo
8:49 p.m. - 3:12 p.m.
BUF
-
DEN
20h 23m
1 stop
Frontier Logo
6:03 a.m. - 8:17 p.m.
DEN
-
BUF
12h 14m
1 stop
C$ 335Frontier
Wed, 10 Jun - Sat, 13 Jun
Frontier Logo
2:50 p.m. - 10:16 p.m.
BUF
-
DEN
9h 26m
1 stop
Frontier Logo
2:47 p.m. - 10:40 a.m.
DEN
-
BUF
17h 53m
2 stops
C$ 336Frontier
Thu, 14 May - Sun, 17 May
Multiple Airlines Logo
11:36 a.m. - 11:58 p.m.
BUF
-
DEN
14h 22m
2 stops
Multiple Airlines Logo
10:00 a.m. - 1:54 p.m.
DEN
-
BUF
25h 54m
1 stop
C$ 343Multiple Airlines
Thu, 4 Jun - Mon, 8 Jun
Frontier Logo
8:49 p.m. - 8:24 a.m.
BUF
-
DEN
13h 35m
1 stop
Frontier Logo
6:00 a.m. - 6:59 p.m.
DEN
-
BUF
10h 59m
1 stop
C$ 346Frontier
Thu, 4 Jun - Mon, 8 Jun
Frontier Logo
11:36 a.m. - 10:24 p.m.
BUF
-
DEN
12h 48m
1 stop
Frontier Logo
6:00 a.m. - 6:59 p.m.
DEN
-
BUF
10h 59m
1 stop
C$ 347Frontier
Thu, 30 Jul - Sun, 2 Aug
Frontier Logo
8:57 p.m. - 8:20 a.m.
BUF
-
DEN
13h 23m
1 stop
Frontier Logo
6:03 a.m. - 8:12 p.m.
DEN
-
BUF
12h 09m
1 stop
C$ 373Frontier
Thu, 4 Jun - Mon, 8 Jun
Frontier Logo
8:49 p.m. - 8:24 a.m.
BUF
-
DEN
13h 35m
1 stop
Frontier Logo
6:00 a.m. - 6:59 p.m.
DEN
-
BUF
10h 59m
1 stop
C$ 375Frontier
Thu, 30 Jul - Mon, 3 Aug
Frontier Logo
8:57 p.m. - 8:20 a.m.
BUF
-
DEN
13h 23m
1 stop
Frontier Logo
11:42 p.m. - 10:40 a.m.
DEN
-
BUF
8h 58m
1 stop
C$ 401Frontier
Booking Insights

KAYAK's insights & trends for Buffalo to Denver flights

Get data-powered insights and trends into flights from Buffalo to Denver to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Buffalo to Denver?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Buffalo to Denver departing in June.

What is the cheapest month to fly from Buffalo to Denver?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Buffalo to Denver, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Buffalo to Denver is August, where tickets cost C$ 369 (return) on average. On the other hand, the most expensive months are January and December, where the average cost of round-trip tickets is C$ 624 and C$ 590 respectively.

Can I save money by flying with a layover from Buffalo to Denver?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at C$ 318 on average.

How far in advance should I book a flight from Buffalo to Denver?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Buffalo to Denver, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Buffalo to Denver, you should book around 3 weeks before departure, which saves you about 30% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flightC$ 145
Best time to beat the crowds but there is an average 15% increase in price.
Most popular time to fly and prices are also 26% lower on average.
Flight from Buffalo to Denver

When to book flights from Buffalo to Denver

Are your dates flexible? Find out the best times to travel from Buffalo to Denver based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Buffalo to Denver

  • What is the cheapest flight from Buffalo to Denver?

    In the last 3 days, the lowest price for a flight from Buffalo to Denver was C$ 145 for a one-way ticket and C$ 318 for a round-trip.

  • Which airports will I be using when flying from Buffalo to Denver?

    Buffalo airport is called Buffalo and the only airport in Denver is Denver Intl.

  • Which airlines offer Wi-Fi service onboard planes from Buffalo to Denver?

    All the following airlines offer inflight Wi-Fi service on the Buffalo to Denver flight route: JetBlue, Delta, American Airlines, United Airlines, WestJet, and Air Canada.

  • Which aircraft models fly most regularly from Buffalo to Denver?

    The Boeing 737-800 is the aircraft model that flies most regularly on the Buffalo to Denver flight route.

  • Which airline alliances offer flights from Buffalo to Denver?

    Star Alliance is the only airline alliance operating flights between Buffalo and Denver.

  • On which days can I fly direct from Buffalo to Denver?

    There are direct flights from Buffalo to Denver on a daily basis.

  • Which is the best airline for flights from Buffalo to Denver, Southwest or United Airlines?

    The two airlines most popular with KAYAK users for flights from Buffalo to Denver are Southwest and United Airlines. With an average price for the route of C$ 590 and an overall rating of 8.0, Southwest is the most popular choice. United Airlines is also a great choice for the route, with an average price of C$ 538 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Buffalo to Denver?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Buffalo to Denver.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Buffalo to Denver?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from Buffalo is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Buffalo to Denver?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Denver with an airline and back to Buffalo with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Buffalo to Denver?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Denver from Buffalo up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Buffalo to Denver

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 724 or less round-trip.

Prefer to fly direct from Buffalo to Denver?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Buffalo to Denver Intl.
Find which airlines fly direct from Buffalo Airport to Denver Intl Airport, which days they fly and book direct flights.

Direct departures

Buffalo to Denver Intl

Monday

United Airlines,Southwest

United Airlines,Southwest

Tuesday

United Airlines,Southwest

United Airlines,Southwest

Wednesday

United Airlines,Southwest

United Airlines,Southwest

Thursday

United Airlines,Southwest

United Airlines,Southwest

Friday

United Airlines,Southwest

United Airlines,Southwest

Saturday

Southwest,United Airlines

Southwest,United Airlines

Sunday

United Airlines,Southwest

United Airlines,Southwest

See more nonstop flights

Direct returns

Denver Intl to Buffalo

Monday

United Airlines,Southwest

United Airlines,Southwest

Tuesday

United Airlines,Southwest

United Airlines,Southwest

Wednesday

United Airlines,Southwest

United Airlines,Southwest

Thursday

United Airlines,Southwest

United Airlines,Southwest

Friday

United Airlines,Southwest

United Airlines,Southwest

Saturday

Southwest,United Airlines

Southwest,United Airlines

Sunday

United Airlines,Southwest

United Airlines,Southwest

See more nonstop flights

Reviews of the top 3 airlines flying from Buffalo to Denver

 
See real verified KAYAK customer reviews for airlines flying from Buffalo to Denver. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Buffalo to Denver? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4329 reviews
8.1Boarding
8.0Comfort
8.6Crew
7.5Entertainment
7.0Food
Airline reviews

The new boarding process was easy and straightforward. Very pleasant.

10.0 ExcellentAnonymous, Apr 2026
LAS - OKC
Read more Southwest reviews

The new boarding process was easy and straightforward. Very pleasant.

The flight was okay. The pilots did an amazing job and kept us updated on the flight. The flight attendants were okay. They found time to be chatty with each other rather than focus on the guests. One of the attendants was a little less warm when asking about my bag I had on my lap that I was using during latter part of the mid- flight. Mind you, it was not the departure descent. I’m respectful to each and every attendant, it was the tone in her voice reminding me to place my carryon bag on the floor. I hope to have a better experience next time.

The entire travel day was a disaster from beginning to end. Woke up at two in the morning to make it to San Juan airport in time for a 5:30 am flight to Milwaukee which connected in Baltimore. Massive delays lead to me missing original connection out of Baltimore. Sixteen hours of delays/rebooking/layover time later, arrived in Milwaukee to find that only one of two checked bags made it there (despite the fact that Southwest brought another 737 jet to San Juan to fly us out to our original Baltimore connection—-not squeezed into another booked flight). The flight from Baltimore to Milwaukee was barely half full, so there was no logical reason to ship my bags out of Baltimore on a different flight to Chicago to then ship to Milwaukee. Southwest decided that my bags should not have been on the same connecting flight I WAS ON to Milwaukee, and then proceeded to accidentally leave my larger bag with the important items in Chicago. Terrible logic and support all around. Extremely angered and disappointed with SW. What a clownish operation your company has become!

It was as expected and I was grateful for the wheel chair help and ease of use.

One of the best airlines for fast boarding, on time arrivals, and top notch service!

The new seat assignment thing is wierd. If you don’t pay for a seat they always assign you a middle seat regardless of how many people are on the flight. Idk… the new company that bought Southwest is trying to make it more profitable, but I’m just not seeing it. The flight attendants aren’t having as much fun anymore. It just feels like the airline is slowly dying. IMO. We shall see if Southwest is the next Toy’s R Us.

Terrible. Even though there’s assigned seating now, they are still the slowest boarding airline of anyone.

The Air hostess were very rude on my flight from Houston to Austin . Their regular communication itself felt a they are shouting at people.

Communication about the delayed flight was poor. We were told to move gates three times but that was bad information. We went from gate 128 to gate 126 and then to gate 123 and back to gate 126. Communication about the delay was bad. Ended up being 1 1/2 hour late getting home.

Plane was late. Zero service for 2+ hour flight and it was not that bumpy.

The boarding process was straightforward. One pertinent observation regarding all boarding procedures is that if an individual requires assistance or possesses a special status and is part of preboarding, it is advisable to limit the number of passengers who can preboard with them, rather than the entire, sometimes large, companion groups. The seats are uncomfortable, and the entertainment options are significantly inferior compared to other airlines. During the snack service, I requested an additional bag of snacks, but my request was denied. Initially, the flight attendant agreed to my request.becoming a strange accurate moment. The flight duration was four hours.

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

During landing. 2 crew members passed 3 times by my lane and didn't notice that people in front of us had their site to the furthermore reclined... That was uncomfortable and could have been dangerous.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

It’s always a great time flying with united airlines.

We got delayed three hours and nobody thought to have the bathroom fixed while we were sitting waiting to board? took a full hour to have maintenance come and check it off. Had to shut the bathroom down twice so that the pilots could go to the bathroom. Everyone missed their connections.

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

As great a red-eye flight as red-eye flights can be.

Both of my flights arrived early and check in process was smooth

Everything was on time Will use united again for sure

It was an early flight and most people napped/slept and the crew let us which was nice.

The crew acted like they had never done this and kept barking passive aggressive orders at people. + the security line + the delay + sitting on the tarmac for 2 hours + none of the apps or signage updating with correct times

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

Seats were new and comfortable. Staff was fine. Missed my connection due to weather -which wasn’t their fault- but got no help at all. Gate staff sent me to customer service, which was and stayed unstaffed. Sign with QR code directed me to call or chat. Chat was useless. Call was returned after an hour. No itinerary offered by Frontier could get me home in less than 30 hours. Rebooked with another airline and got a partial refund that came to about 10 percent of what I paid to get home.

The experience was good. No frills but I got there safe and sound and on time.

As every law enforcement agency I could imagine surrounded the plane and we didn’t disembark for 2 hours and then had to stick around for another hour to go get our personal belongings after leaving them behind and being bused away from the plane, it was scary and inconvenient. We were given no information as to why this was happening. Lack of communication with passengers was disappointing.

I was 2 hr arrive in the airport and 45 min in the line . After take to my turn . The agent tell me I’m later . I can not board . So my vacation was going to the floor . Just for their bad customer service agent in the airline

Everything you need to know for your flight from Buffalo to Denver

Information on your arrival and departure airports