$141 Cheap Frontier Airlines flights Fort Myers (RSW) to Denver (DEN)

Finding cheap one-way Frontier Airlines flights from RSW to DEN from $141 on Expedia couldn’t be easier — just filter by “Price (lowest to highest).” Alternatively, check out our affordable round-trip fares from $260 for your next adventure.**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 fly to Denver with Frontier Airlines. You could also find great prices on one-way and round-trip fares in November.

Start searching one to three months before your departure to score cheap fares on Frontier Airlines flights from Southwest Florida Intl. Airport (RSW) to Denver Intl. Airport (DEN). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Time it well, and you can enjoy significant savings on domestic flights.*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.

Enter your dates, press search and select the “Nonstop” filter on Expedia to find any direct flights from RSW to DEN with Frontier Airlines or other carriers.

To find the earliest departure from RSW to DEN with Frontier Airlines, filter your results by “Morning” and “Early Morning.” Booking an early flight generally means 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 Southwest Florida Intl. Airport (RSW) to Denver, and you’ll likely land at Denver Intl. Airport (DEN). This is the airline’s primary hub here.

With a rewarding loyalty program, Frontier Airlines is a popular choice for many passengers journeying from RSW to DEN. Plus, if you’re 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.

Changes are generally free within 24 hours of making a booking, but your airline may add a charge after that. For more details about altering your reservation, go to your “Trips,” select your flight and click on “Manage Booking.” If you want the freedom to adjust your plans without extra charges, check the “Changes included” and “No cancel fee” filters when organizing your next escape.