$174 Cheap United flights Boston (BOS) to Aspen (ASE)

Landing cheap one-way United Airlines flights from BOS to ASE from $174 on Expedia is simple — just filter by “Price (lowest to highest).” Alternatively, check out our affordable round-trip fares from $292 for your next break.**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.

Browse for round-trip or one-way flights to Aspen in May or April. You could find cheaper fares with United Airlines during these off-peak travel months.

Begin your search one to three months before your departure to score cheap fares on United Airlines flights from Logan Intl. Airport (BOS) to Pitkin County Airport (ASE). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Nail your timing, and you can enjoy significant savings on domestic journeys.*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 our “Nonstop” filter when looking for direct United Airlines flights from BOS to ASE. You can also compare other airlines servicing the same nonstop journey.

Sort your results by “Morning” and “Early Morning” to browse the earliest departures from BOS to ASE. Taking off early means you’re 20% 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.

Pitkin County Airport (ASE) is the primary Aspen gateway for United Airlines flights from Logan Intl. Airport (BOS).

With a rewarding loyalty program, United Airlines is a favorite of many passengers departing from BOS to ASE. Plus, as a United Mileage Plus and One Key™ member booking through Expedia, you could 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 your fare type, a fee typically applies if you modify or cancel your booking more than 24 hours after it’s been confirmed. To find flexible fares, select our “No cancel fee” or “Changes included” filter when you look for flights. To learn more about canceling or modifying your reservation, go to “Trips,” select your flight and click on “Manage Booking.”