$148 Cheap Flights from Buffalo (BUF) to Denver (DEN)

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.

*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.

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 November. 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 $148 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.