C$110 Cheap Flights from Buffalo Niagara (BUF) to Denver International (DEN)

Compare Buffalo Niagara to Denver International flight deals

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Flight deals from Buffalo Niagara Airport to Denver International Airport

Looking for a cheap last-minute deal or the best return flight from Buffalo Niagara Airport to Denver International Airport? If you want to travel next month, return fares start from C$220. Find the lowest prices on one-way and return tickets right here.

Denver.C$110 per passenger.Departing Fri., May 8.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Fri., May 8, arriving in Denver International.Price includes taxes and charges.From C$110, select.

Denver.C$112 per passenger.Departing Mon., Apr. 27.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Mon., Apr. 27, arriving in Denver International.Price includes taxes and charges.From C$112, select.

Denver.C$200 per passenger.Departing Mon., Jun. 15.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Mon., Jun. 15, arriving in Denver International.Price includes taxes and charges.From C$200, select.

Denver.C$242 per passenger.Departing Fri., Mar. 27.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Fri., Mar. 27, arriving in Denver International.Price includes taxes and charges.From C$242, select.

Denver.C$300 per passenger.Departing Thu., Apr. 23.One-way flight with United.Outbound direct flight with United departs from Buffalo Niagara on Thu., Apr. 23, arriving in Denver International.Price includes taxes and charges.From C$300, select.

Denver.C$300 per passenger.Departing Mon., Sep. 14.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Buffalo Niagara on Mon., Sep. 14, arriving in Denver International.Price includes taxes and charges.From C$300, select.

Denver.C$300 per passenger.Departing Tue., Jun. 9.One-way flight with United.Outbound direct flight with United departs from Buffalo Niagara on Tue., Jun. 9, arriving in Denver International.Price includes taxes and charges.From C$300, select.

Denver.C$301 per passenger.Departing Tue., May 12.One-way flight with United.Outbound direct flight with United departs from Buffalo Niagara on Tue., May 12, arriving in Denver International.Price includes taxes and charges.From C$301, select.

Denver.C$302 per passenger.Departing Thu., Aug. 6.One-way flight with United.Outbound direct flight with United departs from Buffalo Niagara on Thu., Aug. 6, arriving in Denver International.Price includes taxes and charges.From C$302, select.

Denver.C$314 per passenger.Departing Mon., Jul. 6.One-way flight with United.Outbound indirect flight with United, departs from Buffalo Niagara on Mon., Jul. 6, arriving in Denver International.Price includes taxes and charges.From C$314, select.

Denver.C$314 per passenger.Departing Mon., Nov. 16.One-way flight with Delta.Outbound indirect flight with Delta, departs from Buffalo Niagara on Mon., Nov. 16, arriving in Denver International.Price includes taxes and charges.From C$314, select.

Denver.C$314 per passenger.Departing Wed., Feb. 3.One-way flight with American Airlines.Outbound indirect flight with American Airlines, departs from Buffalo Niagara on Wed., Feb. 3, arriving in Denver International.Price includes taxes and charges.From C$314, select.

Denver.C$319 per passenger.Departing Sun., Jul. 5.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Buffalo Niagara on Sun., Jul. 5, arriving in Denver International.Price includes taxes and charges.From C$319, select.

Denver.C$603 per passenger.Departing Tue., Mar. 31.One-way flight with United.Outbound direct flight with United departs from Buffalo Niagara on Tue., Mar. 31, arriving in Denver International.Price includes taxes and charges.From C$603, select.

Denver.C$705 per passenger.Departing Mon., Nov. 30.One-way flight with United.Outbound direct flight with United departs from Buffalo Niagara on Mon., Nov. 30, arriving in Denver International.Price includes taxes and charges.From C$705, select.

Find the cheapest month to fly from Buffalo Niagara to Denver International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Buffalo Niagara to Denver International flights are currently cheapest in May.

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Which airlines fly from Buffalo Niagara to Denver International?

Buffalo Niagara to Denver International: Alternative routes

Compare routes from Buffalo Niagara to Denver below. You may find an airport to fly into that's cheaper, faster, or easier than Denver International.

Buffalo to Denver: Flight information

The things to know before you go.

Cheapest flight found	C$110
Cheapest month to fly	May
Average flight time	3 hrs, 34 mins
Most popular airline	Southwest Airlines
Average flights per week	14

Finding cheap flights from Buffalo Niagara to Denver International: Frequently asked questions

How much are return flights from Buffalo Niagara to Denver International?

The best price we found for a return flight from Buffalo Niagara to Denver International is C$220. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from Buffalo Niagara to Denver International?

3 hours and 34 minutes is the average flight time from Buffalo Niagara to Denver International.

Which airlines fly direct from Buffalo Niagara to Denver International?

Southwest Airlines and United fly direct from Buffalo Niagara to Denver International.

How many flights are there a week from Buffalo Niagara to Denver International?

As of March 2026, there are 14 flights per week flying from Buffalo Niagara to Denver International.

When is the cheapest time to fly from Buffalo Niagara to Denver International?

The cheapest month to fly from Buffalo Niagara to Denver International is usually April.

Which upcoming date is cheapest to fly from Buffalo Niagara Airport to Denver International Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Buffalo Niagara Airport to Denver International Airport on Monday, April 20, 2026.

Can I get a direct flight from Buffalo Niagara Airport to Denver International Airport?

Yes – the average flight time is 3 hours and 34 minutes.

How can I find the best flight deal to Denver International?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Denver International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Denver?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Denver is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from Buffalo Niagara Airport to Denver International with?

Currently, Frontier Airlines and United offer the cheapest flight tickets to Denver International.

Flying from Buffalo Niagara International Airport (BUF) to Denver International Airport (DEN): what you need to know

3 hours 35 minutes is the average time for a direct flight from Buffalo Niagara International Airport to Denver International Airport. Denver is 2 hours behind Buffalo and is in the UTC-6 timezone.
Every week, there are 8 flights from Buffalo Niagara International Airport to Denver International Airport. The first departure from BUF to DEN is at 05:50 and the latest is at 22:54.
Heading off during a peak period like public or school holidays? Expect longer lines at check-in and security. To play it safe, arrive up to four hours before international flights and two hours ahead of domestic departures.
We make it simple to book a flight with a stopover. To see all the options for flights from Buffalo Niagara International Airport to Denver International Airport, uncheck 'Direct flights only.' Then, pick a flight offering a stop long enough to tour the city of your choice. Some popular stopovers between BUF and DEN include:
- O'Hare International Airport
- Chicago Midway International Airport
- Detroit Metropolitan Wayne County Airport

How to find the cheapest flights from Buffalo Niagara International Airport (BUF) to Denver International Airport (DEN)

C$110 is currently the best price for a one-way ticket from Buffalo Niagara International Airport to Denver International Airport. Return flights start from C$220. These fares can change depending on demand and availability.
Get cheap flight tickets from BUF to DEN by booking 9 months ahead. Based on our research, that's the sweet spot for landing a bargain.
May is the cheapest month for flight tickets from Buffalo Niagara International Airport to Denver International Airport. If you're looking to fly during a different time of year, the 'Whole month' tool will show you the lowest airfares for each month.
Sign into your online account or use the app to create a Price Alert. We'll get in touch right away if there's a cheaper deal on this route. It doesn't take long, and it'll save you time looking for cheap flight tickets from BUF to DEN every day.
Take advantage of filters to find the perfect trip for you. To see the 'Best,' 'Fastest' or 'Cheapest' flights from Buffalo Niagara International Airport to Denver International Airport, use the 'Sort by' tool. You can also filter by airline, departure and arrival times, and number of stops.

Handy information about Buffalo Niagara International Airport (BUF)

Traveling from central Buffalo to Buffalo Niagara International Airport takes approximately 1 hour and 15 minutes on public transport. If you ride-share, drive or get a cab, you'll cover the 18 kilometres in 21 minutes or so, depending on traffic.
Have an early flight from Buffalo Niagara International Airport to Denver International Airport? Avoid the last-minute rush to the airport (and sneak in some extra precious sleep) by picking one of these hotels close to BUF:

Arriving at Denver International Airport (DEN)

Consider checking in to SpringHill Suites Denver Airport after your flight from Buffalo Niagara International Airport to Denver International Airport. It's not too far from DEN and a comfortable option if you want to freshen up right away.

Getting from Denver International Airport (DEN) to central Denver

From Denver International Airport, Denver is approximately 40 kilometres away. It takes around 34 minutes to reach the center driving.
It takes roughly 1 hour and 31 minutes if you're traveling by public transport.

When to fly to Denver International Airport (DEN)

July is the most popular month for flights from Buffalo Niagara International Airport to Denver International Airport. To skip the crowds, head to Denver in April.
Lock in your flight from Buffalo Niagara International Airport to Denver International Airport for July if you'd like to explore Denver during its warmest month. Expect temperatures of between 14ºC and 32ºC.
If you like cooler conditions, look for a cheap ticket from BUF to DEN in January. Temperatures average between -9ºC and 7ºC then.

More about Denver

After locking in your flights from BUF to DEN, you'll need to find a hotel in Denver. Make one of these options your base for exploring this exciting city:
All great journeys should include a little sightseeing. Denver Art Museum, Union Station and Denver Botanic Gardens are must-have experiences during your Denver visit.

Complete your Denver trip with hotels and a car rental

You've booked a cheap ticket to Denver International Airport — next on the list is finding a place to stay, and maybe even your own set of wheels. We've compared prices across hundreds of companies to bring you the top hotels and car rental deals in Denver.