£86 Find Cheap Flights from Boston to Denver – Compare and Save

These are the earliest and latest flight times available from Boston to Denver:

• Earliest: departs at 05:00 and lands at 09:42
• Latest: departs at 21:06 and lands at 01:48.

The flight takes about 4h 42m.

Only Economy class is available on flights from Boston to Denver.

A direct flight from Boston to Denver takes 4h 42m, covering 1,748 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Return flights from Boston to Denver range from £208 to £349, with an average of £272 over the past 12 months. Anything below £208 counts as a good deal.

Last-minute fares on this route (booked within 2 weeks of departure) run 20% above the route average of £272. Book 14 weeks before departure for the lowest fares.

On this route, stopover flights are cheaper than direct options on average. Stopover fares average £169 return via Cleveland Hopkins Intl (CLE), compared with £274 for direct.

Delta is slightly above the route average for timely arrivals, while United Airlines has a lower on-time arrival rate. On-time arrival rates on Boston to Denver flights are:

• Delta: 89% on time
• United Airlines: 87% on time
• JetBlue: 77% on time

On average, flights on this route are punctual 82% of the time.

There is no standard. Checked bag policies vary by airline on this route. Most carriers charge £26–£75 for the first checked bag in Economy. Premium fares and elite status bookings typically include a free checked bag.

The Airbus A321neo family is used most often on this route, operated mainly by United Airlines and Delta. Other aircraft seen on the route include Airbus A220-300 variants.

Morning is the busiest departure period on Boston to Denver flights, with 70% leaving in that window. Afternoon departures account for 20%, Evening flights for 10%, and Night flights for 0%.

Yes. Based on fares seen in the past 5 days, return flight prices on this route showed a wide range, from about £158 to £782. That means the highest observed fare was about 5x higher than the lowest one.

Two airlines offer in-flight Wi-Fi on Boston to Denver flights:

• JetBlue
• Delta

Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty programme, while others are paid add-ons priced by flight length.

One-way fares from Boston to Denver are currently lower than usual. Average one-way flight prices are about £86, which is 45% below the typical average for this route.

Denver Intl Airport (DEN) hosts 5 major car hire companies, with daily rates starting from around £12 for economy cars. Top options include:
• Routes Car & Truck Rentals
• Ace
• NU Car
• Europcar
• Hertz

Flights from Boston to Denver usually depart from Boston Logan Intl (BOS) and arrive at Denver Intl (DEN).

Night flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the Boston to Denver route, 18% of flights were delayed in the past 3 months, with delays averaging 2 hours 29 minutes.

One-stop flights from Boston to Denver most commonly connect through:

• Atlanta Hartsfield-Jackson (ATL) – 19% of one-stop connections
• Dallas/Fort Worth (DFW) – 16% of one-stop connections
• Philadelphia (PHL) – 16% of one-stop connections
• Charlotte Douglas (CLT) – 8% of one-stop connections

Atlanta Hartsfield-Jackson (ATL) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 26% on the Boston to Denver route. Wednesday is the cheapest departure day at £237 return on average, while Sunday is the most expensive at £320, a difference of £83. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

4 airlines operate flights between Boston and Denver. The airlines offering direct flights on this route include:

• United Airlines
• Southwest
• JetBlue
• Delta

Flying via Baltimore/Washington (BWI) gives the shortest average 1-stop total travel time of 6h 28m, compared to 6h 39m via Lambert-St Louis (STL) and 6h 41m via Chicago O'Hare Intl (ORD).

Denver is 2 hours behind Boston (Mountain Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in Denver are Colorado Convention Center, Hyatt Regency Denver at Colorado Convention Center, and Coors Field. These are among the most viewed places in Denver on KAYAK.

Among airlines operating Boston to Denver flights:

• United Airlines: offers extra legroom; offers free seat selection
• JetBlue: offers extra legroom; offers free seat selection
• Southwest: offers free seat selection
• Delta: offers extra legroom; offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Here are some options for this route, based on selected ticket types and cabin classes:

• United Airlines: a cabin bag and a checked bag in Economy class
• JetBlue: a cabin bag and a checked bag in Economy class
• Southwest: a cabin bag and a checked bag in Economy class

Bag allowance can vary by ticket type, cabin class, route, and airline, so travellers should check the fare details before booking.