Cheap Frontier Airlines flights Bloomington (BMI) to Denver (DEN)

You can find cheap return Frontier Airlines flights from BMI to DEN by filtering your results from “Price (lowest to highest)” on Expedia. Or look for bargains for a one-way trip.**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.

Search for return or one-way flights to Denver in January or November. You could find a cheap fare with Frontier Airlines during these off-peak times.

Look for cheap Frontier Airlines flights from Central Illinois Regional Airport (BMI) to Denver Intl. Airport (DEN) one to three months before your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and journey, the best day to book a domestic flight is generally Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**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.

Select our “Nonstop” filter when looking for direct Frontier Airlines flights from BMI to DEN. It’s also an easy way to compare other airlines offering the same direct trip.

To find the earliest departure from BMI to DEN with Frontier Airlines, filter your results by “Morning” and “Early Morning.” Booking an early flight generally means you’re less likely to experience 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.

Denver Intl. Airport (DEN) is the primary Denver gateway for Frontier Airlines flights from Central Illinois Regional Airport (BMI).

With a rewarding loyalty program, Frontier Airlines is a favorite of many travelers departing from BMI 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.

It’s generally possible to modify or cancel your flight, although additional charges may apply if you booked over 24 hours ago. Prefer to keep your options open? Apply the “No cancel fee” and “Changes included” filters to find flights that won’t charge you extra if you need to adjust your plans. To update your booking, head to “Trips,” select your flight and click on “Manage Booking” for more information.