Cheap Spirit Airlines flights Boston (BOS) to Denver (DEN)

Scoring cheap one-way Spirit Airlines flights from BOS to DEN on Expedia is simple — just filter by “Price (lowest to highest).” Alternatively, check out our budget-friendly return fares for your next getaway.**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.

Spirit Airlines flights to Denver are generally cheaper in the off-peak months of January and November. Whether you’re after a return or one-way ticket, you could land a better deal then.

For cheap Spirit Airlines fares from Logan Intl. Airport (BOS) to Denver Intl. Airport (DEN), start searching one to three months before your planned 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 affect the price you pay. Sunday is typically the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking 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.

Click on the “Nonstop” filter when searching for direct Spirit Airlines flights from BOS to DEN. You’ll also be able to compare other airlines servicing the same nonstop trip.

To find the earliest departure from BOS to DEN with Spirit Airlines, sort 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.

Get on a Spirit Airlines flight from Logan Intl. Airport (BOS) to Denver, and you’ll most likely come in to Denver Intl. Airport (DEN). This is the airline’s main hub here.

A rewarding loyalty program and the chance to rack up points through Free Spirit are the start of the reasons to jet off from BOS to DEN with Spirit Airlines. Plus, when you join Expedia’s free One Key™ program, you can receive OneKeyCash™* on top of any airline loyalty program earnings. You can put it toward your future trips.*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 cancel or change your booking more than 24 hours after it’s been confirmed. To find plane tickets with more flexibility, select our “No cancel fee” or “Changes included” filter when you search for flights. To learn more about canceling or changing your reservation, visit “Trips,” select your flight and tick “Manage Booking.”