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Cheap flight tickets from Buffalo Niagara to Denver

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Flight deals from Buffalo Niagara Airport to Denver

Looking for a cheap last-minute deal or the best return flight from Buffalo Niagara Airport to Denver? If you want to travel next month, return fares start from RM732. Find the lowest prices on one-way and return tickets right here.
Denver.RM630 per passenger.Departing Tue, 21 Apr, returning Mon, 4 May.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Tue, 21 Apr, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Mon, 4 May, arriving in Buffalo Niagara.Price includes taxes and charges.From RM630, select.
Denver.RM732 per passenger.Departing Tue, 5 May, returning Sat, 9 May.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Tue, 5 May, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Sat, 9 May, arriving in Buffalo Niagara.Price includes taxes and charges.From RM732, select.
Denver.RM732 per passenger.Departing Tue, 21 Apr, returning Tue, 28 Apr.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Tue, 21 Apr, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Tue, 28 Apr, arriving in Buffalo Niagara.Price includes taxes and charges.From RM732, select.
Denver.RM984 per passenger.Departing Fri, 22 May, returning Mon, 1 Jun.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Fri, 22 May, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Mon, 1 Jun, arriving in Buffalo Niagara.Price includes taxes and charges.From RM984, select.
Denver.RM1,068 per passenger.Departing Thu, 26 Mar, returning Mon, 4 May.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Thu, 26 Mar, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Mon, 4 May, arriving in Buffalo Niagara.Price includes taxes and charges.From RM1,068, select.
Denver.RM1,161 per passenger.Departing Fri, 27 Mar, returning Mon, 30 Mar.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Fri, 27 Mar, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Mon, 30 Mar, arriving in Buffalo Niagara.Price includes taxes and charges.From RM1,161, select.
Denver.RM1,241 per passenger.Departing Thu, 26 Mar, returning Thu, 2 Apr.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Thu, 26 Mar, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Thu, 2 Apr, arriving in Buffalo Niagara.Price includes taxes and charges.From RM1,241, select.
Denver.RM1,398 per passenger.Departing Mon, 27 Jul, returning Mon, 3 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Mon, 27 Jul, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Mon, 3 Aug, arriving in Buffalo Niagara.Price includes taxes and charges.From RM1,398, select.
Denver.RM1,405 per passenger.Departing Tue, 21 Jul, returning Fri, 24 Jul.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Tue, 21 Jul, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Fri, 24 Jul, arriving in Buffalo Niagara.Price includes taxes and charges.From RM1,405, select.
Denver.RM1,439 per passenger.Departing Tue, 5 May, returning Sat, 9 May.Return flight with United.Outbound direct flight with United departs from Buffalo Niagara on Tue, 5 May, arriving in Denver International.Inbound direct flight with United departs from Denver International on Sat, 9 May, arriving in Buffalo Niagara.Price includes taxes and charges.From RM1,439, select.
Denver.RM1,439 per passenger.Departing Thu, 28 May, returning Tue, 2 Jun.Return flight with United.Outbound direct flight with United departs from Buffalo Niagara on Thu, 28 May, arriving in Denver International.Inbound direct flight with United departs from Denver International on Tue, 2 Jun, arriving in Buffalo Niagara.Price includes taxes and charges.From RM1,439, select.
Denver.RM1,475 per passenger.Departing Mon, 20 Apr, returning Thu, 23 Apr.Return flight with United.Outbound direct flight with United departs from Buffalo Niagara on Mon, 20 Apr, arriving in Denver International.Inbound direct flight with United departs from Denver International on Thu, 23 Apr, arriving in Buffalo Niagara.Price includes taxes and charges.From RM1,475, select.
Denver.RM1,569 per passenger.Departing Tue, 28 Apr, returning Fri, 1 May.Return flight with United.Outbound direct flight with United departs from Buffalo Niagara on Tue, 28 Apr, arriving in Denver International.Inbound direct flight with United departs from Denver International on Fri, 1 May, arriving in Buffalo Niagara.Price includes taxes and charges.From RM1,569, select.
Denver.RM1,635 per passenger.Departing Fri, 5 Jun, returning Thu, 11 Jun.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Buffalo Niagara on Fri, 5 Jun, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Thu, 11 Jun, arriving in Buffalo Niagara.Price includes taxes and charges.From RM1,635, select.
Denver.RM1,720 per passenger.Departing Wed, 23 Sep, returning Sat, 26 Sep.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Buffalo Niagara on Wed, 23 Sep, arriving in Denver International.Inbound direct flight with Southwest Airlines departs from Denver International on Sat, 26 Sep, arriving in Buffalo Niagara.Price includes taxes and charges.From RM1,720, select.
Denver.RM1,720 per passenger.Departing Sun, 12 Jul, returning Sat, 18 Jul.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Buffalo Niagara on Sun, 12 Jul, arriving in Denver International.Inbound direct flight with Southwest Airlines departs from Denver International on Sat, 18 Jul, arriving in Buffalo Niagara.Price includes taxes and charges.From RM1,720, select.

Find the cheapest month to fly from Buffalo Niagara to Denver

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Buffalo Niagara to Denver flights are currently cheapest in April.
Mar
from RM1,161
Apr
from RM732
May
from RM732
Jun
from RM1,635
Jul
from RM1,405
Aug
from RM1,728
Sep
from RM1,720
Oct
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Nov
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Dec
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Jan
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Feb
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Direct flights from Buffalo Niagara to Denver

Alternative Buffalo Niagara to Denver routes

Looking for the cheapest, fastest or easiest route from Buffalo Niagara to Denver? You could fly into the following airports instead.

Denver Arapahoe Co

1km from central Denver
Closest
Search flights

Broomfield

23km from central Denver
Search flights

Denver International

30km from central Denver
Cheapest
from RM630
Search flights

Northern Colorado Regional

79km from central Denver
Search flights

Buffalo to Denver: Flight information

The things to know before you go.
Cheapest flight foundRM630
Cheapest month to flyApril
Average flight time3 hrs, 34 mins
Most popular airlineSouthwest Airlines
Average flights per week18

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

There are 4 airports in Denver: Denver Arapahoe Co, Broomfield, Denver International, and Northern Colorado Regional.
The best price we found for a return flight from Buffalo Niagara to Denver is RM630. 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.
3 hours and 34 minutes is the average flight time from Buffalo Niagara to Denver.
Southwest Airlines and United fly direct from Buffalo Niagara to Denver.
As of March 2026, there are 36 flights per week flying from Buffalo Niagara to Denver.
The cheapest month to fly from Buffalo Niagara to Denver is usually April.
If you're flying from Buffalo Niagara Airport, the cheapest airport near Denver is Denver International – which is 29.9 km away from the centre of Denver. We've found flights into this airport from RM630.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Buffalo Niagara Airport to Denver on Tuesday, 21 April 2026.
Yes – the average flight time is 3 hours and 34 minutes.
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 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.
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.
In March, the average temperature is usually around 4°C. July is typically the warmest month in Denver, when it usually averages around 31°C. You can expect the least rain in January. The coldest month is December, with temperatures averaging -6°C. The rainiest month is July.
Currently, Frontier Airlines and United offer the cheapest flight tickets to Denver.

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

  • Around 3 hours 10 minutes is how long you'll be travelling on a direct flight from Buffalo Niagara International Airport to Denver.

  • Denver is two hours behind Buffalo, where Buffalo Niagara International Airport is located. Denver observes the UTC-6 timezone.

  • Buffalo Niagara International Airport (BUF) to Denver International Airport (DEN) is the most popular route, with 11 weekly flights to pick from. If you have things to do before leaving, the last flight from BUF to DEN is with Southwest Airlines at 17:30. Opt for the first departure operated by Southwest Airlines at 05:05 if you want to get on your way earlier.

  • For stress-free travel, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This will give you plenty of time to board your BUF to Denver flight.

  • Delays at security and check-in are likely if you're heading away during high season, so give yourself even more breathing space. A good general rule for peak periods? Get there up to four hours early for international flights and at least two hours for domestic departures.

  • Begin your journey at BUF and travel straight to Denver International Airport (DEN). That's where you can expect to touch down when searching for Buffalo Niagara International Airport to Denver tickets.

  • There's a good selection of airlines operating direct flights from Buffalo Niagara International Airport to Denver, such as:

  • BUF is about 13 kilometres from central Buffalo. If you're catching a cab, driving or ride-sharing from the centre, it'll take you 20 minutes or so to get there, depending on traffic conditions. If you're using public transport, expect the journey time to be around 1 hour 15 minutes.

  • Want an easy start to your holiday? Stay near BUF. Whether you're boarding an early flight from Buffalo Niagara International Airport to Denver or just don't want to be rushed, these hotels are worth a look:

  • When it comes to the on-time performance of Buffalo Niagara International Airport, 75.46% of flights stick to their scheduled arrival time.

  • You'll find BUF at Genesee Street.

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

  • RM337 is currently the lowest price for a one-way Buffalo Niagara International Airport to Denver flight. Return flight tickets start at RM630. These fares may change based on availability.

  • To pick up cheap flights from BUF to Denver, reserve your trip one month ahead of your planned departure.

  • The best month for landing cheap Buffalo Niagara International Airport to Denver tickets is May. Use the 'Whole month' tool to compare prices, then select the dates with the lowest fares.

  • There's no need to check in daily to find out if fares have dropped when you create a Price Alert. We'll notify you as soon as there's an updated deal for cheap flights from BUF to Denver.

  • Save on your flight from Buffalo Niagara International Airport to Denver with the help of our filters. Select your ideal duration, departure time and airlines, then sort the results by 'Cheapest' for the best deals.

Airports in Denver

Denver International Airport (DEN)

  • The distance from Denver International Airport (DEN) to central Denver is roughly 40 kilometres. It takes around 35 minutes to get to the centre driving.

  • Travelling to the centre by public transport typically takes 1 hour 30 minutes.

  • Jump off your flight from Buffalo Niagara International Airport to Denver and be tucked up in your hotel bed soon after. If you want a convenient option just a short drive from DEN, head for Baymont by Wyndham Denver International Airport.

  • Follow your own route with a Denver International Airport rental car. Pick up your wheels from Routes Car Rentals, Dollar or Budget and experience more of Denver and beyond.

  • Booking your vehicle from Denver International Airport about one week ahead of your flight from BUF to Denver can help you lock in the lowest rate.

  • The address for DEN is 8500 Pena Boulevard.

Best time to go to Denver

  • Visit Denver during high season if you want a busy atmosphere, but remember that prices may be higher. Alternatively, book flights from Buffalo Niagara International Airport to Denver during low season when prices are cheaper and it's not as busy.

  • Book a Buffalo Niagara International Airport to Denver flight ticket with a departure in July if you're eager to experience the city during its warmest month. Expect temperatures to range from 14ºC (57ºF) to 32ºC (90ºF).

  • Look for cheap tickets from BUF to Denver in January if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between -9ºC (16ºF) and 7ºC (45ºF) on average.

More about Denver

Explore more of United States

  • Colorado Springs is just one of the many places in United States waiting to be explored once you've taken in the sights of Denver. Around 105 kilometres away to the south, check out popular attractions including US Northern Command (USNORTHCOM) / North American Aerospace Defence Command (NORAD) Headquarters, Cheyenne Mountain Air Force Station and National Strength and Conditioning Association (NSCA).

  • If you're eager to discover another side of United States, consider Pueblo, roughly 161 kilometres south of Denver. Pueblo Weisbrod Aircraft Museum, Rosemount Museum and Pueblo Zoo are among its highlights.

Plan the rest of your trip from Buffalo to Denver

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.