C$ 168 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 5:00 am and lands at 9:46 am
• Latest: departs at 9:06 pm and lands at 1:52 am.

The flight takes about 4h 46m.

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

A direct flight from Boston to Denver takes 4h 46m, covering 4,528 km.

No, a passport is not required for this domestic route, but you will need another form of identification, such as a driver's licence.

Round-trip flights from Boston to Denver range from C$ 402 to C$ 676, with an average of C$ 527 over the past 12 months. Anything below C$ 402 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 24% above the C$ 527 route average. Book 12 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than direct options on average. Layover fares average C$ 280 round-trip via Cleveland Hopkins Intl (CLE), compared to C$ 531 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: 88% on time
• United Airlines: 87% on time
• JetBlue: 77% on time

On average, flights on this route are punctual 81% of the time.

There is no standard. Checked bag policies vary by airline on this route. Most carriers charge C$ 50–C$ 143 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, round-trip prices on this route showed a wide range, from about C$ 298 to C$ 1,639. 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 program; 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 C$ 200, which is 36% below the typical average for this route.

Denver Intl Airport (DEN) hosts 5 major car rental companies, with daily rates starting from around C$ 21 for economy cars. Top options include:

• Routes Car & Truck Rentals
• Ace
• Europcar
• NU Car
• 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, while evening departures tend to have the most.

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, 19% of flights were delayed in the past three months, with delays averaging 2h 28m.

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

• Atlanta Hartsfield-Jackson (ATL) – 20% of one-stop connections
• Dallas/Fort Worth (DFW) – 17% of one-stop connections
• Philadelphia (PHL) – 16% of one-stop connections
• Chicago O'Hare Intl (ORD) – 16% of one-stop connections

Yes. Flexible dates can save you up to 25% on flights from Boston to Denver. Wednesday is the cheapest departure day at C$ 468 round-trip on average, while Sunday is the most expensive at C$ 619, a difference of C$ 151.

KAYAK's flexible dates feature shows options up to three 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 at 6h 33m, compared with 6h 37m via Lambert-St Louis (STL) and 6h 46m via Chicago Midway (MDW).

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, 16th Street Mall, and Sheraton Denver Downtown Hotel. 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 carry-on bag and a checked bag in Economy Class
• JetBlue: a carry-on bag and a checked bag in Economy Class
• Southwest: a carry-on bag and a checked bag in Economy Class

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