Cheap Flights from Denver to Buffalo from US$120

Frequently Asked Questions

• What are the cheapest flights from Denver to Buffalo (DEN-BUF)?

  Based on Trip.com data, Frontier Airlines offers one-way fares as low as US$120 on Cheapest nonstop routes (e.g. DEN to BUF on Tue, Oct 6), while Frontier Airlines offers Cheapest nonstop round-trips from US$193 departing on Wed, Oct 14 and returning on Sun, Oct 18.

• How long is a flight from Denver to Buffalo?

  It takes about 3 hours 9 minutes to fly from Denver to Buffalo.

• When is the best time to book flights from Denver to Buffalo?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Denver to Buffalo is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How can I find the best deals on flights from Denver to Buffalo?

  To find best deals on flights from Denver to Buffalo, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Oct 6, with one-way flights priced at just US$120.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is United Airlines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for Buffalo travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Denver (DEN) to Buffalo (BUF) the cheapest?

  The cheapest months to fly from Denver to Buffalo is October, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Denver to Buffalo on?

  After crunching the numbers on our September flight calendar, it's currently cheapest to fly from Denver to Buffalo on September 16, 2026 with Frontier Airlines, with prices starting at US$217.

• Is there any time difference between Denver and Buffalo?

  The time difference between Buffalo and Denver is 2h.

• How do I change or cancel my ticket from Denver to Buffalo?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average cost of a one-way flight from Denver to Buffalo?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Denver to Buffalo is US$256. Fares vary by travel date, airline and availability.

• What is the average cost of a round-trip flight from Denver to Buffalo?

  Based on Trip.com data for travel in the next 30 days, the average round-trip fare from Denver to Buffalo is US$489. The final price depends on the outbound and return dates, airline and fare conditions.

• How do I book flights from Denver to Buffalo on Trip.com?

  Enter Denver and Buffalo, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.

• Are there budget airlines on the Denver to Buffalo route?

  Frontier Airlinesare the most popular budget airlines flying from Denver to Buffalo. Check baggage, seat and payment fees before comparing the final price.