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$81+ Cheap flights from Buffalo to Denver (BUF - DEN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — DEN
May 25 — Jun 11
Mon 5/25
Mon 6/1
1 adult, Economy
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Find cheap flights from Buffalo to Denver with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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Cheapflights Tip: The best prices from Buffalo to Denver Intl are usually found in August or October, booked 90 days in advance, depart on a Friday or Monday and return on a Friday

Cheap flight deals from Buffalo to Denver

Cheapest flights from Buffalo to Denver
Explore the most affordable flight options available from Buffalo to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 25, 2026.

This CheapOair deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/47:44 pm
BUF
-
DEN
1 stop20h 48m
Frontier
Mon 6/86:00 am
DEN
-
BUF
1 stop10h 59m
Frontier
Deal found 4/21$221
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/222:49 pm
BUF
-
DEN
2 stops20h 23m
Frontier
Tue 5/2611:54 pm
DEN
-
BUF
1 stop12h 00m
Frontier
Deal found 4/20$223
This Expedia deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/38:08 pm
BUF
-
DEN
1 stop27h 36m
Frontier
Tue 5/511:54 pm
DEN
-
BUF
1 stop12h 00m
Frontier
Deal found 4/20$225
This Frontier deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/301:08 pm
BUF
-
DEN
1 stop11h 21m
Frontier
Mon 5/411:59 pm
DEN
-
BUF
1 stop8h 42m
Frontier
Deal found 4/20$226
This Expedia deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/87:52 pm
BUF
-
DEN
1 stop29h 02m
Frontier
Thu 7/166:03 am
DEN
-
BUF
1 stop12h 09m
Frontier
Deal found 4/20$230
This Kiwi.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/272:49 pm
BUF
-
DEN
1 stop9h 35m
Frontier
Thu 5/285:27 pm
DEN
-
BUF
2 stops18h 27m
Frontier
Deal found 4/21$233
This Kiwi.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/912:41 pm
BUF
-
DEN
1 stop11h 43m
Frontier
Thu 5/147:41 am
DEN
-
BUF
2 stops28h 13m
Frontier
Deal found 4/21$238
This CheapOair deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/189:02 pm
BUF
-
DEN
1 stop20h 14m
Frontier
Tue 6/2311:49 pm
DEN
-
BUF
1 stop17h 23m
Frontier
Deal found 4/21$241
This Kiwi.com deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/272:49 pm
BUF
-
DEN
1 stop20h 16m
Frontier
Tue 6/26:30 am
DEN
-
BUF
2 stops29h 24m
Frontier
Deal found 4/23$242
This Kiwi.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/912:41 pm
BUF
-
DEN
1 stop11h 43m
Frontier
Tue 5/1211:59 pm
DEN
-
BUF
2 stops11h 55m
Frontier
Deal found 4/21$243
This Frontier deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/309:02 pm
BUF
-
DEN
1 stop13h 18m
Frontier
Wed 7/811:42 pm
DEN
-
BUF
1 stop8h 58m
Frontier
Deal found 4/21$244

Find flight deals from Buffalo to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Buffalo (BUF) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$221
(CheapOair)

One-way from

$81
(Booking.com)

Popular in

January

Cheapest in

August

Average price

$392

Good round-trip deal

$441 or less

Good one-way deal

$225 or less
Provider with most accurate pricing for Buffalo-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Buffalo-Denver Intl flights.
Search Deals
From Buffalo to Denver Intl
Search Deals
One-way flight from Buffalo to Denver Intl
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($70 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Buffalo to Denver Intl.
Search Deals
Price to beat on a one-way flight from Buffalo to Denver Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Buffalo to Denver that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 25, 2026.
Use the filters below to find and compare flights from Buffalo to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BuffaloDenver

BUF - DEN

BUFDEN

Buffalo

Tue 7/21

3:00 pm-9:27 pm

1 stop8h 27m

Denver Intl

Wed 7/22

5:40 pm-10:58 pm

Nonstop3h 18m

$447
Quickest round-trip

BuffaloDenver

BUF - DEN

BUFDEN

Buffalo

Wed 5/27

9:00 am-10:35 am

Nonstop3h 35m

Denver Intl

Thu 5/28

5:40 pm-10:58 pm

Nonstop3h 18m

$449

BuffaloDenver

BUF - DEN

BUFDEN

Buffalo

Wed 7/22

5:12 pm-12:35 am

1 stop9h 23m

Denver Intl

Thu 7/23

2:10 pm-11:59 pm

1 stop7h 49m

$470

BuffaloDenver

BUF - DEN

BUFDEN

Buffalo

Thu 8/6

6:50 am-8:15 am

Nonstop3h 25m

Denver Intl

Sun 8/9

11:55 pm-11:50 am

1 stop9h 55m

$473

BuffaloDenver

BUF - DEN

BUFDEN

Buffalo

Thu 7/2

4:40 pm-6:15 pm

Nonstop3h 35m

Denver Intl

Mon 7/6

11:55 pm-12:00 pm

1 stop10h 05m

$473

BuffaloDenver

BUF - DEN

BUFDEN

Buffalo

Thu 5/28

10:34 am-4:58 pm

1 stop8h 24m

Denver Intl

Sat 6/6

5:40 pm-10:58 pm

Nonstop3h 18m

$473

BuffaloDenver

BUF - DEN

BUFDEN

Buffalo

Wed 8/12

8:40 am-1:35 pm

2 stops6h 55m

Denver Intl

Mon 8/17

8:10 am-6:25 pm

2 stops8h 15m

$480

BuffaloDenver

BUF - DEN

BUFDEN

Buffalo

Mon 9/28

4:30 pm-11:45 pm

1 stop9h 15m

Denver Intl

Fri 10/2

11:59 pm-10:35 am

1 stop8h 36m

$483

BuffaloDenver

BUF - DEN

BUFDEN

Buffalo

Tue 7/21

9:00 am-2:55 pm

2 stops7h 55m

Denver Intl

Fri 7/24

7:45 pm-11:55 am

2 stops14h 10m

$486

BuffaloDenver

BUF - DEN

BUFDEN

Buffalo

Fri 6/19

6:05 am-1:40 pm

2 stops9h 35m

Denver Intl

Sun 7/5

5:30 am-2:35 pm

2 stops7h 05m

$493

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Buffalo to Denver

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Buffalo to Denver in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Buffalo-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Buffalo-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Buffalo-Denver flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Buffalo-Denver flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Buffalo-Denver flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Buffalo to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Buffalo with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Booking 89 days in advance of your planned departure date is, on average, the best time to get cheap flights from Buffalo to Denver. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Buffalo to Denver?

Currently, August is the cheapest month in which you can book a flight from Buffalo to Denver (average of $267). Flying from Buffalo to Denver in January is currently the most expensive (average of $451). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BUF to DEN?

Find hourly flight availability from Buffalo to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 25, 2026.

One of the essential ways to save on airfare from Buffalo to Denver is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 52% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from Buffalo to Denver. Price data was last updated on April 18, 2026.

Travelers seeking maximum savings on their Buffalo to Denver flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Buffalo to Denver?

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Denver. Reviews last updated April 25, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from Buffalo to Denver have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,333 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,333 reviews
Southwest
8.0
Very good
4,333 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,458 reviews
Southwest
8.0
Very good
4,333 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,650 reviews
Southwest
8.0
Very good
4,333 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,672 reviews
Southwest
8.0
Very good
4,333 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.7
Fair
2,978 reviews
Southwest
8.0
Very good
4,333 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

Find useful and relevant information for your journey from Buffalo to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Buffalo to Denver?

    Booking a flight from Buffalo (BUF) to Denver Intl (DEN) is your only option if you wish to fly from Buffalo to Denver. On a typical day, there is 1 flight from Buffalo to Denver Intl, all of which are around 3h 25m for a nonstop flight. You can also purchase a plane ticket from 5 airlines when you book a flight from Buffalo to Denver.

  • How popular is this Buffalo to Denver flight route?

    This flight path from Buffalo to Denver Intl was viewed by 49 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Buffalo to Denver?

    Departing from Buffalo to Denver will take you 3h 25m. There are 1355 mi between Buffalo and Denver. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Buffalo to Denver round-trip?

    According to our current data, Frontier ($88), Delta ($148), and American Airlines ($190) offers the cheapest pricing from Buffalo to Denver. Frontier is 75% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Buffalo to Denver one-way?

    One-way options have recently been found by users for as low as $48 on Frontier. Other airlines that offer cheap prices include United Airlines from $107 and American Airlines from $109 one-way.

  • What are the cheapest flights from Buffalo to Denver?

    The cheapest flight price from Buffalo to Denver is $164. On average you can expect to pay $814. The most popular route, (Buffalo - Denver Intl), can usually be booked for $272.

  • Can I find deals for flights from Buffalo to Denver that include hotel bookings?

    Yes. In addition to deals on Buffalo to Denver flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Buffalo to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Buffalo to Denver.

  • Can I find deals for business class flights from Buffalo to Denver?

    Yes. Cheapflights offers flight deals from Buffalo to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Buffalo to Denver?

    Currently, August is the cheapest month in which you can book a flight from Buffalo to Denver (average of $267). Flying from Buffalo to Denver in January is currently the most expensive (average of $451). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Thornton
Black Hawk
Lakewood
Westminster
Broomfield
Golden
Centennial
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Central City
Cripple Creek
Winter Park
Manitou Springs
Frisco
Englewood
Fort Morgan
Glendale
Evergreen

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Buffalo to Denver

Discover the top 5 airlines that operate flights from Buffalo to Denver. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$88Average$215FlexibilityNo cancel feeOn-time62%
DeltaCheapest$148Average$298FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$190Average$292FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$201Average$389FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$252Average$429FlexibilityNo cancel feeOn-time63%

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