Cheap Frontier Airlines flights Tulsa (TUL) to Denver (DEN)

Finding cheap one-way Frontier Airlines flights from TUL to DEN on Expedia couldn’t be easier — just filter by “Price (lowest to highest).” Or check out our budget-friendly round-trip fares for your next exciting getaway.**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 least expensive months to get away to Denver with Frontier Airlines. You could also find excellent prices on one-way and return tickets in November.

To find cheap Frontier Airlines fares from Tulsa Intl. Airport (TUL) to Denver Intl. Airport (DEN), start searching one to three months before your planned departure. Reserving 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 influence what you pay. Sunday is generally the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your journey 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 see if there’s a direct trip from TUL to DEN with Frontier Airlines or other airlines, use our “Nonstop” filter when browsing for flights.

Browse Frontier Airlines’s earliest flights from TUL to DEN by selecting our “Morning” and “Early Morning” filters. Not only will you get to where you’re going sooner, early departures also experience 20% fewer cancellations.**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.

Board a Frontier Airlines flight from Tulsa Intl. Airport (TUL) to Denver, and you’ll most likely touch down at Denver Intl. Airport (DEN). This is the airline’s primary hub in this destination.

With a rewarding loyalty program, Frontier Airlines is a popular choice for many travelers departing from TUL to DEN. Plus, as a Frontier Miles and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights on top of your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

It’s usually possible to change or cancel your flight, although there may be a charge if you booked over 24 hours ago. Want to keep your options open? Apply the “No cancel fee” and “Changes included” filters to find flights that won’t charge extra if you have to adjust your plans. To make modifications, head to “Trips,” select your flight and click on “Manage Booking” for more information.