$64 Cheap Frontier Airlines flights Grand Rapids (GRR) to Denver (DEN)

Scoring cheap one-way Frontier Airlines flights from GRR to DEN from $64 on Expedia couldn’t be simpler — just filter by “Price (lowest to highest).” Or check out our affordable return fares from $148 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.

Frontier Airlines flights to Denver are typically more affordable in the quieter months of January and November. Whether you’re after a one-way or round-trip ticket, you could score a better deal then.

Begin your search one to three months ahead of your departure date to get cheaper fares on Frontier Airlines flights from Gerald R. Ford Intl. Airport (GRR) to Denver Intl. Airport (DEN). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to 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.* Nail your timing, and you can enjoy significant savings on domestic journeys.*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 figure out if there’s a direct journey from GRR to DEN with Frontier Airlines or any other carriers, use our “Nonstop” filter when browsing for tickets.

To find the earliest departures from GRR to DEN with Frontier Airlines, sort your results by “Early Morning” and “Morning.” Choosing 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.

Frontier Airlines flights from Gerald R. Ford Intl. Airport (GRR) to Denver arrive at Denver Intl. Airport (DEN). This is the main entry point here.

Offering a rewarding loyalty program, Frontier Airlines is a popular choice for many passengers flying from GRR to DEN. Plus, if you’re a Frontier Miles and One Key™ member booking through Expedia, you could 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 generally possible to cancel or modify your flight, although there may be additional fees if you booked over 24 hours ago. Prefer to keep your options open? Make use of Expedia’s “Changes included” or “No cancel fee” filter to find flights that won’t charge you extra if you have to alter your plans. To modify your booking, go to “Trips,” select your flight and click on “Manage Booking” for further information.