Use the A Line train for a 37-minute ride from DEN to Union Station, avoiding traffic and saving money.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $169 (Kiwi.com) |
One-way from | $95 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $332 |
Good round-trip deal | $237 or less |
Good one-way deal | $147 or less |
Fly from
Fly to
Route
Depart
Return
Price
DenverBoston
DEN - BOS
DENBOS
Denver Intl
mar. 2/24
11:13 pm-5:00 am
Nonstop3h 47m
Boston Logan Intl
sáb. 2/28
12:35 pm-7:27 pm
1 stop8h 52m
DenverBoston
DEN - BOS
DENBOS
Denver Intl
dom. 1/18
11:38 am-5:35 pm
Nonstop3h 57m
Boston Logan Intl
dom. 1/25
7:20 am-10:24 am
Nonstop5h 04m
DenverBoston
DEN - BOS
DENBOS
Denver Intl
jue. 1/29
1:40 pm-7:33 pm
Nonstop3h 53m
Boston Logan Intl
mar. 2/3
9:59 am-12:45 pm
Nonstop4h 46m
DenverBoston
DEN - BOS
DENBOS
Denver Intl
vie. 1/30
11:38 am-5:35 pm
Nonstop3h 57m
Boston Logan Intl
dom. 2/8
7:20 am-10:24 am
Nonstop5h 04m
DenverBoston
DEN - BOS
DENBOS
Denver Intl
mié. 1/21
11:38 am-5:35 pm
Nonstop3h 57m
Boston Logan Intl
mié. 1/28
7:20 am-10:24 am
Nonstop5h 04m
DenverBoston
DEN - BOS
DENBOS
Denver Intl
sáb. 1/10
11:38 am-5:35 pm
Nonstop3h 57m
Boston Logan Intl
sáb. 1/17
7:20 am-10:24 am
Nonstop5h 04m
DenverBoston
DEN - BOS
DENBOS
Denver Intl
lun. 2/2
11:40 am-8:18 pm
1 stop6h 38m
Boston Logan Intl
vie. 2/20
7:31 pm-10:18 pm
Nonstop4h 47m
DenverBoston
DEN - BOS
DENBOS
Denver Intl
jue. 2/5
11:35 am-10:22 pm
1 stop8h 47m
Boston Logan Intl
vie. 2/20
7:31 pm-10:18 pm
Nonstop4h 47m
DenverBoston
DEN - BOS
DENBOS
Denver Intl
lun. 1/12
4:45 pm-10:30 pm
Nonstop3h 45m
Boston Logan Intl
jue. 1/15
7:00 am-9:50 am
Nonstop4h 50m
DenverBoston
DEN - BOS
DENBOS
Denver Intl
jue. 2/5
1:40 pm-7:33 pm
Nonstop3h 53m
Boston Logan Intl
jue. 2/19
5:05 pm-11:00 pm
1 stop7h 55m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
The best time to book flights from Denver to Boston is 78 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Currently, August is the cheapest month in which you can book a flight from Denver to Boston (average of $65). Flying from Denver to Boston in September is currently the most expensive (average of $151). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Unlike at noon, when flights are generally more expensive, you can save up to 26% on flights from Denver to Boston by exploring options for tickets in the evening.
Travelers seeking maximum savings on their Denver to Boston flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
About 24% of weekly flights between Denver and Boston have experienced delays in the past year, with the average delay time being 157 minutes.
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Over the last year, Delta have had the lowest number of delays on this route, with just 20% of flights being delayed.
Chicago (MDW) – chosen by Cheapflights users on 75% of 1-stop itineraries from Denver to Boston on Cheapflights.
Chicago (MDW) is the most affordable 1-stop option, with an average round-trip price of $276.
Flights via Chicago (MDW) have the shortest average one-way travel time for 1-stop routes: 5h 35m.
Flights via Chicago (MDW) offer the fastest connection on this route, with an average layover time of 0h 53m.
Entertainment
Food
Boarding
Overall
Comfort
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Food
Boarding
Overall
Comfort
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Food
Boarding
Overall
Comfort
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Food
Boarding
Overall
Comfort
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Food
Boarding
Overall
Comfort
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Food
Boarding
Overall
Comfort
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$108 | Average$217 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$130 | Average$294 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$134 | Average$287 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$158 | Average$319 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$186 | Average$337 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$193 | Average$369 | FlexibilityNo cancel fee | On-time69% |