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$149 Cheap Flights from Buffalo (BUF) to Denver (DEN)

View $149 flight on Sat, Sep 26, 2026Opens in a new window

Popular airlines from Buffalo Niagara Intl. Airport (BUF) to Denver Intl. Airport (DEN)

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Cheap Flights from Buffalo to Denver (BUF-DEN)

Prices were available within the past 7 days and start at $149 for one-way flights and $298 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Wed, Sep 23 - Tue, Sep 29
BUF
Buffalo
DEN
Denver
$298 Roundtrip, found 1 hour ago
$298
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Wed, Sep 23 from Buffalo to Denver, returning Tue, Sep 29, priced at $298 found 1 hour ago
Frontier Airlines
Sun, Sep 20 - Thu, Sep 24
BUF
Buffalo
DEN
Denver
$302 Roundtrip, found 14 hours ago
$302
Roundtrip
found 14 hours ago
Select Frontier Airlines flight, departing Sun, Sep 20 from Buffalo to Denver, returning Thu, Sep 24, priced at $302 found 14 hours ago
Frontier Airlines
Fri, Sep 25 - Sun, Sep 27
BUF
Buffalo
DEN
Denver
$306 Roundtrip, just found
$306
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Sep 25 from Buffalo to Denver, returning Sun, Sep 27, priced at $306 just found
Frontier Airlines
Thu, Oct 22 - Wed, Oct 28
BUF
Buffalo
DEN
Denver
$308 Roundtrip, found 8 hours ago
$308
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Thu, Oct 22 from Buffalo to Denver, returning Wed, Oct 28, priced at $308 found 8 hours ago
Frontier Airlines
Thu, Sep 24 - Sun, Sep 27
BUF
Buffalo
DEN
Denver
$312 Roundtrip, found 2 hours ago
$312
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, Sep 24 from Buffalo to Denver, returning Sun, Sep 27, priced at $312 found 2 hours ago
Frontier Airlines
Fri, Sep 18 - Tue, Sep 22
BUF
Buffalo
DEN
Denver
$314 Roundtrip, found 6 hours ago
$314
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Fri, Sep 18 from Buffalo to Denver, returning Tue, Sep 22, priced at $314 found 6 hours ago
Southwest Airlines
Mon, Oct 26 - Mon, Nov 2
BUF
Buffalo
DEN
Denver
$399 Roundtrip, found 18 hours ago
$399
Roundtrip
found 18 hours ago
Select Southwest Airlines flight, departing Mon, Oct 26 from Buffalo to Denver, returning Mon, Nov 2, priced at $399 found 18 hours ago
United
Tue, Nov 10 - Fri, Nov 13
BUF
Buffalo
DEN
Denver
$451 Roundtrip, just found
$451
Roundtrip
just found
Select United flight, departing Tue, Nov 10 from Buffalo to Denver, returning Fri, Nov 13, priced at $451 just found
American Airlines
Fri, Oct 9 - Fri, Oct 16
BUF
Buffalo
DEN
Denver
$471 Roundtrip, just found
$471
Roundtrip
just found
Select American Airlines flight, departing Fri, Oct 9 from Buffalo to Denver, returning Fri, Oct 16, priced at $471 just found
Delta
Tue, Nov 10 - Fri, Nov 13
BUF
Buffalo
DEN
Denver
$471 Roundtrip, just found
$471
Roundtrip
just found
Select Delta flight, departing Tue, Nov 10 from Buffalo to Denver, returning Fri, Nov 13, priced at $471 just found

Alternative airports near Denver

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Denver Intl. DEN. Cheapest option available. Average driving time to city center is 32 minutes. Flights from $406
DEN
Denver Intl.
Cheapest
Average driving time to city center32 min
Flights from $406

Find the cheapest month to fly from Buffalo (BUF) to Denver (DEN)

August is typically the cheapest month to fly

From $211 - $321 per traveler.

What you need to know for your flight from Buffalo Niagara Intl. to Denver Intl.

Buffalo (BUF) to Denver (DEN) at a glance

Travel from Buffalo Niagara International Airport (BUF) to Denver International Airport (DEN) with a range of airlines on this domestic short-haul route. You can evaluate your options between full-service and low-cost carriers to discover the best flights from Buffalo to Denver that match your budget and schedule. As you plan your trip, enjoy exploring Denver's iconic attractions and vibrant neighborhoods while keeping an eye out for the latest deals on flights.

  • Fastest flight duration: around 3h 45m non-stop
  • Route distance: roughly 1,400 miles (2,250 km)
  • Flights per week: around 20+ flights with multiple daily departures on average
  • Typical fares (one-way): economy tickets often range from $90–$400, depending on seasonality and how far ahead you book

Flights from Buffalo Niagara International Airport (BUF) to Denver International Airport (DEN)

According to recent traveler bookings, the top airlines flying from Buffalo to Denver are often favored for their non-stop and one-stop flights. Popular layover options include O'Hare International Airport (ORD) with a layover of about 1 hour and 15 minutes, Detroit Metropolitan Wayne County Airport (DTW) at around 1 hour, and Hartsfield-Jackson Atlanta International Airport (ATL), which typically has a layover of about 2 hours and 15 minutes. These choices provide flexibility in balancing price, total travel time, and cabin class to create the ideal itinerary.

  • United: This full-service airline provides both non-stop and one-stop options, with one-way ticket prices generally falling between $105 and $445. United represents around 26% of departures for this route, with a typical non-stop flight duration of 3 hours and 45 minutes.
  • Southwest Airlines: As a budget-friendly carrier, Southwest offers both non-stop and one-stop services, with one-way fares usually ranging from $110 to $510. This airline also comprises about 26% of the departures, with a standard non-stop travel time of 3 hours and 45 minutes.
  • Delta: A full-service airline, Delta specializes in one-stop flights, with one-way fares commonly priced between $120 and $375. It accounts for roughly 19% of departures on this route, featuring an in-flight duration of 5 hours and a total trip time of around 6 hours and 30 minutes, including layover.
  • American Airlines: Another full-service option, American Airlines offers one-stop services with one-way fares typically ranging from $90 to $340. It makes up about 16% of the departures on this route, with an in-flight time of 5 hours and an overall journey time of approximately 6 hours and 30 minutes, including layover.
  • Frontier Airlines: This low-cost carrier provides both non-stop and one-stop flights, with one-way prices generally between $90 and $250. Frontier accounts for around 10% of departures for this route, featuring a typical non-stop travel time of 3 hours and 45 minutes.

Travelers flying from Buffalo to Denver can opt for an upgrade, with both United and American Airlines offering first-class service for this route.

Best time to fly from Buffalo (BUF) to Denver (DEN)

The most popular months for travelers flying from Buffalo to Denver are June, July, and August, when peak temperatures in Denver reach up to 72.1°F in July. If you prefer quieter travel, consider February, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 28.6°F. For better deals, September usually offers the lowest average one-way fare around $173. Flight availability peaks in August, with approximately 29 flights per week, making it easier to find convenient departure times.

  • Cheapest time to fly: September usually offers good deals with average one-way fare around $173, roughly 17% cheaper than the yearly average.
  • More budget-friendly months to fly: August and October typically offer average one-way fares of around $184.
  • Most flight options: August has the highest number of flights from Buffalo to Denver, with approximately 29 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January28.4°F (-2.0°C)Average19$231
February28.6°F (-1.9°C)Moderately Low16$217
March38.5°F (3.6°C)Average18$224
April45.3°F (7.4°C)Average17$220
May54.0°F (12.2°C)Average25$193
June66.9°F (19.4°C)Moderately High28$195
July72.1°F (22.3°C)Moderately High28$192
August71.2°F (21.8°C)Moderately High29$183
September65.1°F (18.4°C)Average21$173
October50.2°F (10.1°C)Average24$186
November38.5°F (3.6°C)Moderately Low20$237
December28.9°F (-1.7°C)Moderately Low23$261

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative routes from Buffalo (BUF) to Denver (DEN)

  • Rochester to Denver (ROC-DEN): Greater Rochester International Airport (ROC) is located approximately 56 miles from Buffalo Niagara International Airport (BUF). One-way economy ticket prices for this route generally vary from $105 to $380, influenced by the season and timing of the booking. Travelers can typically expect one-stop flights, with common layover points including O'Hare International Airport (ORD) and Baltimore Washington International Thurgood Marshall Airport (BWI). Leading airlines on this route include Southwest Airlines (a low-cost carrier) and United, with first-class service also offered.
  • Buffalo to Colorado Springs (BUF-COS): Colorado Springs Airport (COS) is about 73 miles from Denver International Airport (DEN). For this route, one-way economy fares usually fall between $100 and $375, depending on the time of year and when tickets are purchased. Flights on this route typically consist of one-stop options, with popular layover hubs at O'Hare International Airport (ORD) and Denver International Airport (DEN). Major airlines serving this route include Southwest Airlines (a low-cost option) and United, and first-class seating is available as well.

How to find the best prices for flights from Buffalo (BUF) to Denver (DEN)

Getting some of the best deals on flights from Buffalo to Denver is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are typically found when booking 2-8 weeks in advance, which aligns with when most travelers make their reservations. Afternoon departures (12pm-6pm) often offer lower prices, while morning flights (5am-12pm) are the most sought after. Additionally, flying on Friday provides both affordable rates and high popularity among travelers.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Denver International Airport from Buffalo Niagara International Airport

Denver welcomes travelers from Buffalo with a range of transport options based on price, convenience, and proximity. Here's how to reach Denver efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Denver, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Denver International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Denver International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Denver International Airport, Jeppesen Terminal Station, a metro station, is conveniently located about 0.1 miles away on foot, making it easily accessible for travelers.

Frequently asked questions

How much does a flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.) cost?
You can find cheap one-way flights from $149 and cheap return flights from $298 Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.) with Expedia. One-way flights generally range between $173 and $714, and roundtrip flights usually range from $322 to $1173. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.)?
The cheapest month to fly from BUF to DEN is September when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.)?
United operates around 7 direct flights from BUF to DEN every week.
What is the cheapest airline that flies from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.)?
Sun Country Airlines is one of the cheapest airlines offering connecting flights from Buffalo, NY (BUF) to Denver, CO (DEN) with return tickets starting from around $260.36. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.)?
To find a cheap flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.)?
The best airline to fly with from Buffalo, NY (BUF) to Denver, CO (DEN) will differ from traveler to traveler. If you like to fly early, WN offers early morning flights. If price is the most important factor, Frontier Airlines typically offers the lowest fares. WN also offers the most daily flights from BUF to DEN, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.)?
There are approximately 1 nonstop flights per day from Buffalo Niagara Intl. (BUF) to Denver Intl. (DEN). For more options, look at flights that include layovers.
What is the earliest flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.)?
The earliest flight from Buffalo, NY (BUF) to Denver, CO (DEN) typically departs at around 5:00 AM, operated by American Airlines. This flight is available as a seasonal service in December, making it a good option for early risers looking to travel during the holiday season. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.)?
The most popular departure times for flights from Buffalo Niagara Intl. (BUF) to Denver Intl. (DEN) are in the early morning, from 6am to 9am. This accounts for around 37% of total traffic. Many major carriers, including American Airlines, United and Southwest, offer flights during this window. Many travelers prefer this time because it allows them to arrive in Denver with plenty of time to enjoy the day.
How long does it take to fly from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.)?
A nonstop flight from BUF to DEN typically takes around 3 hours 50 minutes, covering approximately 1,356 miles. Connecting flights on this route usually add 4 hours to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.)?
First class seats are offered on the BUF to DEN route. First class cabins are available on:

  • American Airlines
  • Delta Air Lines
  • United Airlines

How much is a business class flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.)?
A direct, return business class ticket from Buffalo, NY (BUF) to Denver, CO (DEN) typically costs between $1,271 - $1,645. A non-stop, one-way business class flight is usually around $692 - $1,148. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.) flight with Expedia?
It's easy to earn miles on a Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Denver from Buffalo Niagara Intl. (BUF)?
From Buffalo Niagara Intl. (BUF), you can fly into Denver Intl. (DEN) to reach Denver. Some flights may connect through major hubs like Baltimore Washington Intl. Thurgood Marshall (BWI), Midway Intl. (MDW), Nashville Intl. (BNA) before reaching Denver. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.) at the last minute?
Typically, booking a last minute flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.) flight and hotel package?
Securing a Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.) Denver Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.)?
If you booked your Buffalo, NY (BUF-Buffalo Niagara Intl.) to Denver, CO (DEN-Denver Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Buffalo Niagara Intl.
Destination airport
Denver Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$298
Distance
1355 mi
Average flight time
1 hour 27 mins

Book with confidence

Buffalo to Denver Flights

The cheapest times to fly from Buffalo to Denver

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Buffalo to Denver are during the month of September. You can find some of the cheapest flights from Buffalo to Denver with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Buffalo to Denver

Sunday is one of the best days to book for cheap flights from Buffalo to Denver: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Buffalo to Denver

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Buffalo to Denver in 2026. You can also book with separate airlines for your outbound and return journeys, from $149 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Buffalo to Denver flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Buffalo to Denver airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Buffalo to Denver Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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