$74 Cheap Frontier Airlines flights Denver (DEN) to Buffalo (BUF)

Landing cheap one-way Frontier Airlines flights from DEN to BUF from $74 on Expedia couldn’t be easier — just filter by “Price (lowest to highest).” Or check out our affordable round-trip fares from $148 for your next exciting vacation.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

January is one of the most affordable months to jet off to Buffalo with Frontier Airlines. You could also find fantastic deals on one-way and return fares in February.

To find cheap Frontier Airlines fares from Denver Intl. Airport (DEN) to Buffalo Niagara Intl. Airport (BUF), start searching one to three months before your planned departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact the overall price. Sunday tends to be the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by choosing to book on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To find out if there’s a direct journey from DEN to BUF with Frontier Airlines or another airline, use our “Nonstop” filter when browsing for flights.

Sort your results by “Early Morning” and “Morning” to browse the earliest flights from DEN to BUF. Jetting off early means flight cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Take a Frontier Airlines flight from Denver Intl. Airport (DEN) to Buffalo, and you’ll probably come in to Buffalo Niagara Intl. Airport (BUF). This is the airline’s main hub in this city.

A rewarding loyalty program and the opportunity to collect points through Frontier Miles are the start of the reasons to leave from DEN to BUF with Frontier Airlines. Plus, when you join our One Key™ program, you can earn OneKeyCash™* alongside any airline loyalty program earnings. It’s yours to spend on future travel plans.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the type of ticket you purchased, a fee generally applies if you modify or cancel your booking more than 24 hours after it’s been confirmed. To find tickets with more flexibility, select our “Changes included” or “No cancel fee” filter while searching for flights. For more information on modifying or canceling your reservation, head to “Trips,” select your flight and click on “Manage Booking.”