$156 Cheap Frontier Airlines flights Boston (BOS) to Denver (DEN)

View $156 flight on Thu, Jul 10, 2025Opens in a new window

$156 Cheap Frontier Airlines flights Boston (BOS) to Denver (DEN)

Prices were available within the past 7 days and start at $156 for one-way flights and $230 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Sep 20 - Wed, Sep 24
BOS
Boston
DEN
Denver
$230 Roundtrip, found 19 hours ago
$230
Roundtrip
found 19 hours ago
Select Frontier Airlines flight, departing Sat, Sep 20 from Boston to Denver, returning Wed, Sep 24, priced at $230 found 19 hours ago
Frontier Airlines
Sat, Sep 6 - Thu, Sep 11
BOS
Boston
DEN
Denver
$231 Roundtrip, found 11 hours ago
$231
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Sat, Sep 6 from Boston to Denver, returning Thu, Sep 11, priced at $231 found 11 hours ago
Flights from Boston (BOS) to Denver (DEN)
Origin airport
Logan Intl.
Destination airport
Denver Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, Sun Country Airlines, United
Popular airline
JetBlue Airways
Distance
1749 mi
Average flight time
2 hours 33 mins

Frequently asked questions

How much is a Frontier Airlines flight from Logan Intl. Airport (BOS) to Denver Intl. Airport (DEN)?
Set the "Price (lowest to highest)" filter on Expedia to look for cheap Frontier Airlines return flights from $230 from BOS to DEN. Affordable one-way options from $156 are available too.**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.
What is the cheapest month to fly from BOS to DEN with Frontier Airlines?
Search for round-trip or one-way flights to Denver in January or November. You could find a cheap fare with Frontier Airlines during these off-peak times.
What is the cheapest time to book flights from Logan Intl. Airport (BOS) to Denver Intl. Airport (DEN) with Frontier Airlines?
Look for affordable Frontier Airlines flights from Logan Intl. Airport (BOS) to Denver Intl. Airport (DEN) one to three months ahead of your departure date. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare class and itinerary, the best day to book a domestic flight is usually Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**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.
Does Frontier Airlines fly nonstop from Logan Intl. Airport (BOS) to Denver Intl. Airport (DEN)?
To see if there's a direct journey from BOS to DEN with Frontier Airlines or another carrier, use our "Nonstop" filter when browsing for tickets.
What is the earliest Frontier Airlines flight from BOS to DEN?
Browse Frontier Airlines's earliest flights from BOS to DEN by selecting our "Early Morning" and "Morning" filters. Not only will you arrive at your destination sooner, early departures also experience 20% fewer 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.
What airports does Frontier Airlines fly into in Denver?
Hop on a Frontier Airlines flight from Logan Intl. Airport (BOS) to Denver, and you'll likely land at Denver Intl. Airport (DEN). This is the airline's primary hub in this destination.
Why fly with Frontier Airlines from BOS to DEN?
A rewarding loyalty program and the opportunity to collect points through Frontier Miles are the start of the reasons to jet off from BOS to DEN with Frontier Airlines. Plus, when you sign up to Expedia's free One Key™ program, you can earn OneKeyCash™* on top of any airline loyalty program earnings. It's yours to spend on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Frontier Airlines flight from Logan Intl. Airport (BOS) to Denver Intl. Airport (DEN)?
Changes are usually free within 24 hours of making your booking, but your airline may add a charge after that. For further details about modifying your reservation, check out your "Trips," select your flight and click on "Manage Booking." If you want the flexibility to change your plans without extra charges, apply the "Changes included" or "No cancel fee" filter when organizing your next break.

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*Available to One Key members.