Frontier's Premium Bundle offers priority boarding and extra legroom for just $20 more than Economy.
Avoid middle seats by selecting Economy Bundle for free Standard seat and carry-on bag.
Planning a trip from Denver to Buffalo? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.
Low season | February |
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High season | July |
Cheapest flight | $68 |
Find which airlines fly direct from Denver Intl Airport to Buffalo Airport, which days they fly and book direct flights.
Direct departures
Denver Intl to Buffalo
Monday
Frontier, Southwest, United Airlines
Frontier, Southwest, +1 more
Tuesday
Southwest, United Airlines
Southwest, United Airlines
Wednesday
Southwest, United Airlines, Frontier
Southwest, United Airlines, +1 more
Thursday
Southwest, United Airlines
Southwest, United Airlines
Friday
Frontier, Southwest, United Airlines
Frontier, Southwest, +1 more
Saturday
Southwest, United Airlines
Southwest, United Airlines
Sunday
Southwest, United Airlines
Southwest, United Airlines
Direct returns
Buffalo to Denver Intl
Monday
Frontier, Southwest, United Airlines
Frontier, Southwest, +1 more
Tuesday
Southwest, United Airlines
Southwest, United Airlines
Wednesday
Southwest, United Airlines, Frontier
Southwest, United Airlines, +1 more
Thursday
Southwest, United Airlines
Southwest, United Airlines
Friday
Frontier, Southwest, United Airlines
Frontier, Southwest, +1 more
Saturday
Southwest, United Airlines
Southwest, United Airlines
Sunday
Southwest, United Airlines
Southwest, United Airlines
It is southwest seat was ok. Not the most comfortable seat
It is southwest seat was ok. Not the most comfortable seat
I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight
The price of the tickets isn't matching the flight experience. No matter how long the flight is, you're only getting pretzels. The flight attendants looked unkept and over it.
Plz don't take away free bags and free seating
The seats were a bit cramped and worn, but otherwise okay.
I would have liked to arrive on time - not 5 hours late!
After a 3 hour layover in Denver my flight was delayed over 5 hours! No explanation; no assistance; no offer to provide compensation; no one at Southwest was willing to offer any assistance. 8 hours in the Denver airport - ridiculous!
It was a perfect flight in all aspects! Both legs!
Only one drink pass through the cabin for a 4 hour flight. Quite rough and bumpy landing.
1.5 hour delay, poor service, no compassion from the crew. Terrible experience
Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.
The plane was old with small storage areas that had problems closing/latching and not enough storage for everyone, and worn, damaged seats. Service was great but feel a little unsafe on such well used planes.
Flights on time. .Ride was as comfortable as can be expected in steerage. Luggage arrived at destination. Attendants were fairly friendly.
Great staff. Wifi is terrible. Signing up for skylines is a painstaking process. Had to call customer service just to get my flight itinerary and confirmation sent to me. Consistent delays. A well staffed company that is run so poorly. Upper management needs to be renewed.
Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons
I sat in comfort plus. It was fine. Seats were comfortable. I got drinks and snacks.
Good and consistent Printer in lounge did not work for me :(
Flight heavily delayed. No food available despite purchasing an upgrade. No in cabin service.
It was not in Delta's control, but when we landed, we ended up parking at the wrong gate, and so everyone was already ready to deplane and had their carryon bags, ready to leave. But we had to sit down and move to the proper gate. This process took over 30 minutes. Again, not Delta's fault - more so on the staff at JFK
My Flight was cancelled and there was no other options available for me to Travel on that date and my options for the next day was all connecting flights that would have me in the airports all day before reaching my destination
Electric plugs didn't work. Entertainment system wasn't working
The design of the light switch on the arm rest is ridiculous.
The gate attendant let me walk right by her with a bag too big for the overhead compartment
Overall, it was a good experience. Boarding was good and there was plenty of overhead bin space for everyone’s carryons (even when we boarded toward the end). Only improvement would be to offer trash service more regularly.
David went above and beyond to make our flight the best that it could be
No food service almost missed because of first flight delays
Delays from united along with Newark air space caused delays. But an average flight! Unfortunately we come to expect delays from the airlines.
Had a hard time finding my assigned seat. No attendants to assist.
The negative was the wait at the airport coming back. I checked my bags in, an hour before boarding and I get the notification that my flight was delayed. Rather had gotten the notification while I was at the hotel. Then it was delayed 3 x’s. Ugh!
Fast checkin with the self serve terminal, good communication at the boarding gate.
Boarding took forever, the plane was cramped and cold, and the seatbelt song came on constantly throughout the red eye flight with a loud pre-recorded message playing each time
Cabin felt crammed Snacks are lame But crew was super efficient getting us out on time despite delay
Any sort of gluten free snack option would be nice
Flight was empty so had a whole row to myself. Still had to wait to get the bag due to the negligence at Palm Springs departure.
I flew out of Reagan National. My flight was delayed, delayed, delayed, and then canceled ...THREE TIMES over TWO DAYS. Staff were seemingly not empowered to provide information on why the flights were screwed up. A real nightmare.
Crew was late. Baggage was late. 2hs inside the plane waiting fro de-icing and traffic. A 3:30hs flight ended up being almost 6hs inside the airplane.
Amazingly comfy flight - I had upgraded for a reasonable price and it was worth it. The food also was good.
Only thing that I liked it that I got to my destination safely, otherwise American Airlines stinks.
Timely boarding process, made up for lost time even after a lengthy wait for de-icing
Ok. Got us there safely and a bit early. Need food available on this long flight. Almost 3 hours.
Everything went as planned. Crew was great. Seats were still not that comfortable.
they delayed my flight which ended up, causing my layover flight to leave without me, resulting in me missing a flight and having to stay overnight in Houston international. I got no compensation other than a flight to my original location only a day later. i’ve never experienced such a unprofessional situation
The seats were extremely hard and uncomfortable, even for a budget airline.
Boarding was very well executed. Got my bag right away.
Overall experience good. There was no food and seats were not terribly comfortable.
There was nothing to like, flight delayed had to move to different departure areas, disorganized to say the leasr
Delayed for two hours due to trivial issues. No reimbursment. Also on arrival further delay due to terminal malfunction.
There were a lot of issues every step of the process. Check in, security, boarding, and dealing with luggage. Plus the money you think you are saving you end up using in hidden fees.
The flight attendant was arguing with a passenger before takeoff. The passenger was frustrated but the flight attendant should have handled it with grace, but instead she was nasty and rude. The seats were comfortable and the flight was uneventful. I wish we didn’t have to pay for drinks or snacks but that’s what you get with a budget airline.
Booked two aisle seats and were switched to an aisle and middle. Not happy.
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