Cheap flights from Denver to Boston from $239 DEN → BOS
Denver International Airport (DEN) → Logan International Airport (BOS)
The cheapest one-way found recently is $239 with Allegiant Air, 9 May 2027, found 3 days ago.
- Cheapest one-way found recently
- $239, found 3 days ago
- Cheapest month to fly
- December 2026, one-way fares from $117 found in the last 7 days
- Airlines with nonstop flights
- jetBlue, United Airlines
- Shortest nonstop flight found
- 3 h 55 min
One-way
The cheapest one-way fare on each of 4 departure dates is usually $133 to $178.
Cheapest one-way found recently
$239
9 May 2027 · Allegiant Air
Denver International Airport (DEN) → Logan International Airport (BOS)
Leaves 12:19 p.m. · 21 h 38 min trip
1 stop
found 3 days ago
Cheapest nonstop one-way
$117
22 Dec · United Airlines
Denver International Airport (DEN) → Logan International Airport (BOS)
Leaves 11:59 p.m. · 3 h 55 min trip
nonstop
found 4 days ago
Found recently, and the cheapest we hold
$239 9 May 2027found 3 days agoOpen this trip
$117 22 Decfound 4 days agoOpen this trip
What have prices looked like?
Over 38 days, 24 Sept to 11 Nov, the cheapest one-way we saw each day was $92 to $147.
At $239, the cheapest one-way found recently is above that range.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 4 departure dates from 23 Nov to 9 May 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 9 May 2027 to compare.
Every date we hold
4 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 23 Nov | $138 | Frontier Airlines | Denver International Airport (DEN) → Logan International Airport (BOS) | 1 stop | found 7 days ago | Open this trip |
| 22 Dec | $117 | United Airlines | Denver International Airport (DEN) → Logan International Airport (BOS) | nonstop | found 4 days ago | Open this trip |
| 28 Dec | $157 | jetBlue | Denver International Airport (DEN) → Logan International Airport (BOS) | nonstop | found 4 days ago | Open this trip |
| 9 May 2027 | $239 | Allegiant Air | Denver International Airport (DEN) → Logan International Airport (BOS) | 1 stop | found 3 days ago | Open this trip |
Which month looks cheapest?
December 2026 is the cheapest month — from $117.
Airlines on the cheapest dates: Frontier Airlines, United Airlines, jetBlue, Allegiant Air.
Premium cabin fares from Denver to Boston
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 9 May 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Denver to Boston?
One-way
Fares 60 to 89 days before departure were typically 34% lower than 7 to 13 days before departure.
From the cheapest one-way each day between 24 Sept and 11 Nov (38 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 7–13 days | $154 | $120 | +51% | 7 |
| 14–29 days | $131 | $104 | +28% | 18 |
| 30–59 days | $126 | $102 | +24% | 26 |
| 60–89 days | $102 | $92 | Cheapest seen | 13 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Denver → Nantucket
148 km from Boston
$772
11 Feb 2027 – 18 Feb 2027 · DEN → ACK · out 2 stops, back 2 stops
found 2 days ago
Denver → Hartford
142 km from Boston
$451
20 Dec – 30 Dec · DEN → BDL · out 1 stop, back 1 stop
found 5 days ago
Colorado Springs → Boston
102 km from Denver
$483
1 Oct 2027 – 4 Oct 2027 · COS → BOS · out 2 stops, back 1 stop
found 6 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest one-way found recently is for 9 May 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a one-way flight from Denver to Boston?
The cheapest one-way found recently is $239 with Allegiant Air, 9 May 2027, found 3 days ago. The cheapest one-way we hold, of any age, is $117 with United Airlines, 22 Dec, found 4 days ago. The cheapest one-way fare on each of 4 departure dates is usually $133 to $178.
What is the cheapest month to fly from Denver to Boston?
December 2026 is the cheapest month for a one-way, from $117, 22 Dec, found 4 days ago.
How far ahead should I book a flight from Denver to Boston?
In 38 days of prices between 24 Sept and 11 Nov, one-way fares 60 to 89 days before departure were typically 34% lower than 7 to 13 days before departure.
Is there a direct flight from Denver to Boston?
Yes, the cheapest nonstop one-way found recently is $117 with United Airlines, 22 Dec, found 4 days ago.
How long is the flight from Denver to Boston?
The cheapest nonstop one-way found recently, with United Airlines on 22 Dec, takes 3 h 55 min from Denver International Airport (DEN) to Logan International Airport (BOS). The cheapest one-way found recently, with Allegiant Air on 9 May 2027, takes 21 h 38 min with 1 stop.
Which airlines have the cheapest flights from Denver to Boston?
Between 23 Nov and 9 May 2027, Frontier Airlines has the cheapest one-way on 1 of the 4 departure dates we hold, United Airlines on 1 and jetBlue on 1.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work