$85 Cheap Frontier Airlines flights Missoula (MSO) to Denver (DEN)

Use the “Price (lowest to highest)” filter on Expedia to find cheap Frontier Airlines return flights from $170 from MSO to DEN. Affordable one-way tickets from $85 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.

January is one of the least expensive months to get away to Denver with Frontier Airlines. You could also find excellent prices on one-way and round-trip fares in November.

For cheap Frontier Airlines fares from Missoula Intl. Airport (MSO) to Denver Intl. Airport (DEN), start searching one to three months before your intended departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact how much you pay. Sunday is usually the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your flight on a Sunday.**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.

Fill in your dates, press search and select the “Nonstop” filter on Expedia to find any direct flights from MSO to DEN with Frontier Airlines or another airline.

To find the earliest departure from MSO to DEN with Frontier Airlines, filter your results by “Early Morning” and “Morning.” Booking an early flight usually 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.

Frontier Airlines flights from Missoula Intl. Airport (MSO) to Denver touch down at Denver Intl. Airport (DEN). This is the main entry point here.

With a rewarding loyalty program, Frontier Airlines is a top choice for many travelers heading from MSO 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.

Depending on the type of ticket you purchased, a fee is typically charged if you change or cancel your booking more than 24 hours after it has been confirmed. To secure flexible plane tickets, select our “Changes included” or “No cancel fee” filter while looking for flights. To learn more about canceling or changing your reservation, go to “Trips,” select your flight and tick “Manage Booking.”