$63+ Cheap flights to Boulder
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Flights to Boulder in 2025
Cheapest flights to BoulderExplore the most affordable flight options available to Boulder. Find the lowest fares based on data from user searches, with prices last updated on December 27, 2025.
Explore the most affordable flight options available to Boulder. Find the lowest fares based on data from user searches, with prices last updated on December 27, 2025.
This Frontier deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Frontier deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Trip.com deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kiwi.com deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kiwi.com deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Frontier deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Cheapflightsfares deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Frontier deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kiwi.com deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Cheapflightsfares deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Cheapflightsfares deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Cheapflightsfares deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Find flight deals to Boulder
Find the latest flights to Boulder in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 2,558,603 searches and data was last updated on December 27, 2025.
Popular in | December |
|---|---|
Cheapest in | January |
Average price | $377 |
Round-trip from | $147 |
One-way from | $63 |
Cheapflights Fare Finder
Use the filters below to find and compare flights to Boulder that are best for you.
Fly from
Route
Depart
Return
Price
New YorkDenver
JFK - DEN
JFKDEN
New York John F Kennedy Intl
Sat 1/31
8:00 am-10:57 am
Nonstop4h 57m
Denver Intl
Sat 2/14
6:00 am-11:49 am
Nonstop3h 49m
New YorkDenver
JFK - DEN
JFKDEN
New York John F Kennedy Intl
Mon 1/12
8:00 am-10:42 am
Nonstop4h 42m
Denver Intl
Thu 1/15
11:35 am-5:26 pm
Nonstop3h 51m
New YorkDenver
JFK - DEN
JFKDEN
New York John F Kennedy Intl
Wed 2/4
7:59 am-10:41 am
Nonstop4h 42m
Denver Intl
Sat 2/7
11:35 am-5:21 pm
Nonstop3h 46m
New YorkDenver
JFK - DEN
JFKDEN
New York John F Kennedy Intl
Tue 1/27
8:00 am-10:57 am
Nonstop4h 57m
Denver Intl
Mon 2/2
12:07 pm-6:00 pm
Nonstop3h 53m
New YorkDenver
JFK - DEN
JFKDEN
New York John F Kennedy Intl
Sat 1/10
7:00 am-9:55 am
Nonstop4h 55m
Denver Intl
Wed 1/14
12:07 pm-6:00 pm
Nonstop3h 53m
New YorkDenver
JFK - DEN
JFKDEN
New York John F Kennedy Intl
Sat 1/10
7:55 pm-10:46 pm
Nonstop4h 51m
Denver Intl
Tue 1/13
6:41 am-12:30 pm
Nonstop3h 49m
New YorkDenver
JFK - DEN
JFKDEN
New York John F Kennedy Intl
Sat 1/24
8:00 am-10:57 am
Nonstop4h 57m
Denver Intl
Mon 1/26
6:40 am-12:29 pm
Nonstop3h 49m
New YorkDenver
JFK - DEN
JFKDEN
New York John F Kennedy Intl
Tue 1/13
8:00 am-10:57 am
Nonstop4h 57m
Denver Intl
Thu 1/15
12:07 pm-6:00 pm
Nonstop3h 53m
New YorkDenver
JFK - DEN
JFKDEN
New York John F Kennedy Intl
Tue 1/27
8:00 am-10:57 am
Nonstop4h 57m
Denver Intl
Tue 2/3
12:07 pm-6:00 pm
Nonstop3h 53m
New YorkDenver
LGA - DEN
LGADEN
New York LaGuardia
Tue 1/27
7:30 am-10:25 am
Nonstop4h 55m
Denver Intl
Sat 1/31
1:00 pm-6:50 pm
Nonstop3h 50m
Best time to book a flight to Boulder
Have a flexible travel schedule? Discover the best time to fly to Boulder with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight to Boulder
When is the best time to book a flight to Boulder?
Use this chart to determine the optimal time to book a round-trip flight from New York to Boulder. Price data was last updated on December 26, 2025.
Booking 38 days in advance of your planned departure date is, on average, the best time to get cheap flights to Boulder. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
How long is the flight to Boulder?
On average, a flight from New York to Boulder takes 6 hours 3 minutes. Flights to Boulder from other popular cities in USA will vary in length. Below are a few examples of popular routes and their flight times.
When is the cheapest time to fly to Boulder?
Use this chart to determine the cheapest time to fly round-trip from New York to Boulder. Price data was last updated on December 16, 2024.
Users looking for the lowest fares to Boulder should consider flying on Saturday evenings, when prices are typically cheapest. Budget-minded travelers will want to avoid Sunday mornings, when prices are usually at their highest.
Weekly flight availability to Boulder
The most flights from New York to Boulder are scheduled on a Friday (56 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (33 on average).
What are the most popular airlines that fly to Boulder?
The most popular airlines flying from New York to Boulder are United Airlines, Delta and JetBlue.
What are the cheapest airlines that fly to Boulder?
The cheapest airlines flying from New York to Boulder are Frontier, JetBlue and Delta.
Rainfall in Boulder by month
Plan your trip to Boulder by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Boulder ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Boulder when rainfall is around 0.5 in.
Temperature in Boulder by month
Plan your trip to Boulder by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Boulder, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).
Reviews of airlines servicing Boulder
Get insights into the airlines that provide service to Boulder. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boulder. Reviews last updated December 27, 2025.
Read through reviews of airlines servicing the United States, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
Food
Comfort
Crew
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Food
Comfort
Crew
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Food
Comfort
Crew
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Food
Comfort
Crew
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Food
Comfort
Crew
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Food
Comfort
Crew
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN