Cheap flights from Denver to Boston

One-way fares from $131 · DEN → BOS · prices found by travellers in the last 48 hours

Compare all dates Boston → Denver
Cheapest fare
$131

Frontier Airlines · Thu, Dec 24

Cheapest month
December

from $131

Direct flights
Yes

Southwest Airlines

Flight time
3h 50m

2,840 km

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Cheapest month to fly from Denver to Boston

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 $236
  2. December 2026 Cheapest $131

Cheapest dates in December 2026

The lowest fares we've seen for each day, cheapest first.

Frontier Airlines
Depart06:19 Thu, Dec 24DEN → BOS 6h 46m · 1 stop
$131one way, per person
View deal
Southwest Airlines
Depart17:55 Fri, Dec 25DEN → BOS 3h 50m · Direct
$146one way, per person
View deal
See every date in December 2026 →

Plan the rest of your trip to Boston

Where to stay, what to do and getting around, from our travel partners.

Where to stay

Hotels in BostonCompare places to stay on Booking.com Find hotels →

Things to do

Things to do in BostonTours, attractions and day trips on Klook Explore →

Getting around

Airport transfer in BostonPre-book a driver to meet you at arrivals, with Kiwitaxi Book a transfer → Car hire in BostonCompare rental cars from major brands on EconomyBookings Compare cars →

About flights from Denver to Boston

Denver (DEN) and Boston (BOS) are about 2,840 km apart. Direct flights take around 3h 50m, and recent direct fares were with Southwest Airlines. Over the next few months, one-way fares start from $131, and December 2026 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Denver to Boston?

The cheapest one-way fare we've seen recently is $131 with Frontier Airlines, departing Thursday, December 24, 2026. Over the coming months, the lowest fare in each month ranges from $131 to $236.

What is the cheapest month to fly from Denver to Boston?

December 2026 currently has the lowest fares, from $131 one way.

Are there direct flights from Denver to Boston?

Yes. Recent direct fares were with Southwest Airlines.

How long is the flight from Denver to Boston?

A direct flight takes about 3h 50m. Denver and Boston are around 2,840 km apart.

Which airlines fly from Denver to Boston?

Recent fares on this route were with jetBlue, Frontier Airlines and Southwest Airlines.

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