$74 Cheap Frontier Airlines flights Denver (DEN) to Baltimore (BWI)

Make use of the “Price (lowest to highest)” filter on Expedia to search for cheap Frontier Airlines round-trip flights from $158 from DEN to BWI. Affordable one-way options from $74 are also on offer.**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 Baltimore are typically cheaper in the quieter months of January and February. Whether you’re after a one-way or round-trip ticket, you could score a better deal then.

To find cheap Frontier Airlines fares from Denver Intl. Airport (DEN) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI), start searching one to three months before your planned departure. Reserving 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 the cost. Sunday is typically the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your trip 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.

Simply enter your dates, click search and use the “Nonstop” filter on Expedia to browse any direct flights from DEN to BWI with Frontier Airlines or another airline.

To find the earliest departures from DEN to BWI with Frontier Airlines, filter your search by “Morning” and “Early Morning.” Choosing an early flight generally means you’ll experience fewer 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 Denver Intl. Airport (DEN) to Baltimore land at Baltimore Washington Intl. Thurgood Marshall Airport (BWI). This is the main entry point to this destination.

Offering a rewarding loyalty program, Frontier Airlines is a top choice for many passengers departing from DEN to BWI. Plus, as 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 will generally apply if you cancel or change your booking more than 24 hours after it has been confirmed. To find flexible fares, select our “Changes included” or “No cancel fee” filter when you look for flights. For additional information on modifying or canceling your reservation, go to “Trips,” select your flight and tick “Manage Booking.”