$80 Cheap United flights Miami (MIA) to Denver (DEN)

Make use of the "Price (lowest to highest)" filter on Expedia to look for cheap United Airlines return flights from $146 from MIA to DEN. Affordable one-way options from $80 are available as well.**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.

Begin your search one to three months ahead of your departure date to score cheaper fares on United 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 versus last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Get the timing right, 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.

The earliest United Airlines flight from MIA to DEN departs at 7:30AM UTC-5, landing at 10:08AM UTC-7. If you want to jet off later in the day, the last United Airlines flight leaves MIA at 8:55PM UTC-5 and lands at DEN at 11:36PM UTC-7. Flying before noon is generally a smart choice as morning flights are least likely to face 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.

With a rewarding loyalty program, United Airlines is a favorite of many travelers heading from MIA to DEN. Plus, if you're a United Mileage Plus 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.