$140 Cheap Frontier Airlines flights Boston (BOS) to Denver (DEN)

View $140 flight on Wed, Jul 15, 2026Opens in a new window

$140 Cheap Frontier Airlines flights Boston (BOS) to Denver (DEN)

Prices were available within the past 7 days and start at $140 for one-way flights and $261 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, Nov 10 - Wed, Nov 18
BOS
Boston
DEN
Denver
$261 Roundtrip, found 1 day ago
$261
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Nov 10 from Boston to Denver, returning Wed, Nov 18, priced at $261 found 1 day ago
Frontier Airlines
Tue, Nov 10 - Wed, Nov 18
BOS
Boston
DEN
Denver
$389 Roundtrip, found 1 day ago
$389
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Nov 10 from Boston to Denver, returning Wed, Nov 18, priced at $389 found 1 day ago

Alternative airports near Denver

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Denver Intl. DEN. Cheapest option available. Average driving time to city center is 32 minutes. Flights from $247
DEN
Denver Intl.
Cheapest
Average driving time to city center32 min
Flights from $247

Find the cheapest month to fly from Boston (BOS) to Denver (DEN)

September is typically the cheapest month to fly

From $151 - $382 per traveler.

Travel information

Origin airport
Logan Intl.
Destination airport
Denver Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, United
Popular airline
Frontier Airlines
Distance
2798 km
Average flight time
2 hours 38 mins

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