$69 Cheap Frontier Airlines flights Miami (MIA) to Denver (DEN)

Apply the “Price (lowest to highest)” filter on Expedia to look for cheap Frontier Airlines round-trip flights from $138 from MIA to DEN. Affordable one-way options from $69 are also available.**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 cheapest months to jet away to Denver with Frontier Airlines. You could also find great prices on one-way and return fares in November.

Start searching one to three months before your departure to get cheaper fares on Frontier Airlines flights from Miami Intl. Airport (MIA) 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 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.

Take off on one of Frontier Airlines’s 12 weekly direct flights from Miami Intl. Airport (MIA) to Denver Intl. Airport (DEN). To see your options, enter your origin, dates and destination and hit search. Then apply the “Nonstop” and “Airline” filters.

Leave Miami Intl. Airport (MIA) for Denver Intl. Airport (DEN) on a nonstop Frontier Airlines flight, and you’ll be in the air for around 4h 43m.

If flexibility is what you’re after, Friday offers the most choice for Frontier Airlines flights from Miami Intl. Airport (MIA) to Denver Intl. Airport (DEN). Take your pick of 2 different departures.

Taking off from MIA at 6:00AM UTC-5, the first Frontier Airlines flight to DEN arrives at 8:43AM UTC-7. Traveling early means you’ll be less likely to encounter delays.* Not an early riser? The last Frontier Airlines flight from MIA to DEN departs at 6:14PM UTC-5 and touches down at 8:58PM UTC-7.*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 Miami Intl. Airport (MIA) to Denver come in to Denver Intl. Airport (DEN). This is the main gateway here.

Offering a rewarding loyalty program, Frontier Airlines is a favorite of many passengers journeying from MIA to DEN. Plus, if you’re a Frontier Miles and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

For the Miami Intl. Airport (MIA) to Denver Intl. Airport (DEN) route, Frontier Airlines typically flies Airbus A320neo and Airbus A321neo planes. Don’t forget that last-minute changes are possible for operational purposes, meaning your flight may be on a different aircraft.

Changes are often free within 24 hours of booking, but your airline may charge you after that time. For further details about altering your reservation, check out your “Trips,” select your flight and click on “Manage Booking.” If you want the flexibility to make changes without being charged, tick the “Changes included” and “No cancel fee” filters when planning your next getaway.