$109 Cheap United flights Boston (BOS) to Denver (DEN)

Make use of the “Price (lowest to highest)” filter on Expedia to look for cheap United Airlines round-trip flights from $217 from BOS to DEN. Affordable one-way fares from $109 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.

Browse for one-way or round-trip flights to Denver in January or November. You could find lower fares with United Airlines during these off-season months.

For cheap United Airlines fares from Logan Intl. Airport (BOS) to Denver Intl. Airport (DEN), 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 influence 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 choosing to book 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.

Take off on one of United Airlines’s 30 weekly direct flights from Logan Intl. Airport (BOS) to Denver Intl. Airport (DEN). To see your options, enter your destination, origin and dates and hit search. Then use the “Nonstop” and “Airline” filters.

On average, it takes 4h 51m to travel nonstop from Logan Intl. Airport (BOS) to Denver Intl. Airport (DEN) with United Airlines.

If flexibility is what you’re after, Saturday offers the most choice for United Airlines flights from Logan Intl. Airport (BOS) to Denver Intl. Airport (DEN). Take your pick of 5 different departures.

The earliest United Airlines flight from BOS to DEN takes off at 7:00AM UTC-5, touching down at 9:55AM UTC-7. If you’d like to set off later, the last United Airlines flight leaves BOS at 8:35PM UTC-5 and touches down at DEN at 11:27PM UTC-7. Flying early is generally a smart option as morning flights are 20% less likely to be canceled.**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.

Catch a United Airlines flight from Logan Intl. Airport (BOS) to Denver, and you’re most likely to come in to Denver Intl. Airport (DEN). This is the airline’s primary hub in this destination.

A rewarding loyalty program and the ability to collect points through United Mileage Plus are the start of the reasons to depart from BOS to DEN with United Airlines. Plus, when you join our One Key™ program, you can receive OneKeyCash™* on top of any airline loyalty program earnings. It’s yours to spend on future travel plans.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You’ll likely board a Boeing 737-900 or a Boeing 737 MAX 8 when flying United Airlines from Logan Intl. Airport (BOS) to Denver Intl. Airport (DEN). However, keep in mind that a different plane may be assigned due to operational factors.

It’s usually possible to modify or cancel your flight, although there may be additional charges if you booked over 24 hours ago. Need to keep your options open? Apply the “Changes included” or “No cancel fee” filter to find flights that won’t penalize you if you need to adjust your plans. To make modifications, go to “Trips,” select your flight and click on “Manage Booking” for more information.