Cheap flights from Boston to Denver

One-way fares from $115 · BOS → DEN · prices found by travellers in the last 48 hours

Compare all dates Denver → Boston
Cheapest fare
$115

Southwest Airlines · Mon, Nov 23

Cheapest month
November

from $115

Direct flights
Yes

jetBlue

Flight time
4h 35m

2,840 km

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Cheapest month to fly from Boston to Denver

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

  1. November 2026 Cheapest $115
  2. March 2027 $179

Cheapest dates in November 2026

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

Southwest Airlines
Depart08:15 Mon, Nov 23BOS → DEN 8h 56m · 1 stop
$115one way, per person
View deal
Frontier Airlines
Depart12:39 Thu, Nov 19BOS → DEN 6h 56m · 1 stop
$142one way, per person
View deal
United Airlines
Depart18:05 Wed, Nov 25BOS → DEN 6h 02m · 1 stop
$168one way, per person
View deal
Frontier Airlines
Depart12:39 Thu, Nov 12BOS → DEN 7h 00m · 1 stop
$194one way, per person
View deal
Frontier Airlines
Depart12:39 Mon, Nov 9BOS → DEN 6h 56m · 1 stop
$199one way, per person
View deal
Alaska Airlines
Depart18:09 Sun, Nov 8BOS → DEN 9h 05m · 1 stop
$279one way, per person
View deal
See every date in November 2026 →

Plan the rest of your trip to Denver

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

Where to stay

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

Things to do

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

Getting around

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

About flights from Boston to Denver

Boston (BOS) and Denver (DEN) are about 2,840 km apart. Direct flights take around 4h 35m, and recent direct fares were with jetBlue. Over the next few months, one-way fares start from $115, and November 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 Boston to Denver?

The cheapest one-way fare we've seen recently is $115 with Southwest Airlines, departing Monday, November 23, 2026. Over the coming months, the lowest fare in each month ranges from $115 to $179.

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

November 2026 currently has the lowest fares, from $115 one way.

Are there direct flights from Boston to Denver?

Yes. Recent direct fares were with jetBlue.

How long is the flight from Boston to Denver?

A direct flight takes about 4h 35m. Boston and Denver are around 2,840 km apart.

Which airlines fly from Boston to Denver?

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

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