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Boulder

$84+ 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 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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Flights to Boulder in 2025

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 November 13, 2025.

Popular in

April

Cheapest in

October

Average price

$292

Round-trip from

$138

One-way from

$84
Highest demand for flights based on searches. 7% potential increase in price ($24 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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From New York to Denver Intl
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One-way flight from New York to Boulder
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Find flight deals to Boulder

Cheapest flights to Boulder
Explore the most affordable flight options available to Boulder. Find the lowest fares based on data from user searches, with prices last updated on November 13, 2025.

This Kissandfly.com deal was found by Cheapflights users on 11/13. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/810:55 pmLGA - DEN
Nonstop4h 28mFrontier
Mon 12/156:00 amDEN - LGA
2 stops15h 05mFrontier
Deal found 11/13$136
This Mytrip deal was found by Cheapflights users on 11/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:59 amJFK - DEN
1 stop22h 59mFrontier
Mon 12/1511:59 pmDEN - JFK
1 stop8h 01mFrontier
Deal found 11/13$136
This Kiwi.com deal was found by Cheapflights users on 11/13. 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.
Thu 12/48:59 amLGA - DEN
2 stops11h 09mMultiple Airlines
Sat 12/64:25 pmDEN - LGA
Nonstop3h 35mMultiple Airlines
Deal found 11/13$137
This CheapOair deal was found by Cheapflights users on 11/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:59 amJFK - DEN
1 stop22h 59mFrontier
Thu 12/1811:59 pmDEN - JFK
1 stop10h 30mFrontier
Deal found 11/13$137
This Frontier deal was found by Cheapflights users on 11/13. 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.
Fri 12/510:08 pmLGA - DEN
1 stop11h 07mFrontier
Mon 12/86:25 amDEN - LGA
1 stop12h 48mFrontier
Deal found 11/13$138
This CheapOair deal was found by Cheapflights users on 11/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/61:00 pmJFK - DEN
1 stop21h 56mFrontier
Wed 12/1012:59 amDEN - JFK
1 stop9h 01mFrontier
Deal found 11/13$138
This Kiwi.com deal was found by Cheapflights users on 11/13. 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.
Thu 12/411:20 amJFK - DEN
1 stop14h 39mFrontier
Sat 12/69:42 amDEN - JFK
Nonstop3h 47mFrontier
Deal found 11/13$139
This FlightHub deal was found by Cheapflights users on 11/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1112:30 pmLGA - DEN
1 stop9h 15mFrontier
Mon 12/1511:25 pmDEN - LGA
1 stop10h 04mFrontier
Deal found 11/12$140
This Frontier deal was found by Cheapflights users on 11/12. 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.
Mon 12/84:29 pmJFK - DEN
Nonstop4h 40mFrontier
Fri 12/129:42 amDEN - JFK
Nonstop3h 47mFrontier
Deal found 11/12$140
This Frontier deal was found by Cheapflights users on 11/11. 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.
Wed 12/318:30 pmLGA - DEN
1 stop14h 12mFrontier
Sun 1/1111:59 pmDEN - LGA
1 stop9h 30mFrontier
Deal found 11/11$141
This CheapOair deal was found by Cheapflights users on 11/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1210:00 amJFK - DEN
1 stop13h 38mFrontier
Fri 12/1910:37 pmDEN - JFK
1 stop28h 53mFrontier
Deal found 11/12$141
This CheapOair deal was found by Cheapflights users on 11/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/58:30 pmLGA - DEN
1 stop14h 32mFrontier
Mon 12/1511:25 pmDEN - LGA
1 stop10h 04mFrontier
Deal found 11/12$142

Cheapflights Fare Finder

 
Locate flights to Boulder that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 2,558,603 searches and data was last updated on November 13, 2025.
Use the filters below to find and compare flights to Boulder that are best for you.

Fly from

New York

Route

Depart

Return

Price

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

Tue 12/9

2:22 pm-4:49 pm

Nonstop4h 27m

Denver Intl

Tue 12/16

11:23 am-5:01 pm

Nonstop3h 38m

$167

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Fri 12/12

7:30 pm-10:07 pm

Nonstop4h 37m

Denver Intl

Sun 12/14

11:28 pm-5:00 am

Nonstop3h 32m

$167

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Thu 12/4

4:30 pm-7:01 pm

Nonstop4h 31m

Denver Intl

Mon 12/8

11:59 pm-5:44 am

Nonstop3h 45m

$167

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Fri 12/5

8:59 pm-11:47 pm

Nonstop4h 48m

Denver Intl

Sun 12/7

7:10 am-12:59 pm

Nonstop3h 49m

$167

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Sat 12/6

8:05 am-10:48 am

Nonstop4h 43m

Denver Intl

Sat 12/13

7:10 am-12:59 pm

Nonstop3h 49m

$168

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Tue 12/30

8:21 pm-10:59 pm

Nonstop4h 38m

Denver Intl

Sat 1/10

11:35 am-5:21 pm

Nonstop3h 46m

$199

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

Wed 1/28

7:30 am-10:25 am

Nonstop4h 55m

Denver Intl

Sat 1/31

7:30 am-1:28 pm

Nonstop3h 58m

$207

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Thu 1/29

8:00 am-10:57 am

Nonstop4h 57m

Denver Intl

Tue 2/10

12:07 pm-6:00 pm

Nonstop3h 53m

$207

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Wed 1/28

7:55 pm-10:48 pm

Nonstop4h 53m

Denver Intl

Sat 1/31

12:07 pm-6:00 pm

Nonstop3h 53m

$207

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Tue 1/13

7:55 pm-10:48 pm

Nonstop4h 53m

Denver Intl

Sat 1/17

12:07 pm-6:00 pm

Nonstop3h 53m

$207

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 60 results
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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.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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 November 7, 2025.

Booking 75 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 22 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 afternoons, when prices are usually at their highest.

Weekly flight availability to Boulder

The most flights from New York to Boulder are scheduled on a Monday (51 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (10 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.

Frontier
Frontier
From $37
United Airlines
United Airlines
From $97
Southwest
Southwest
From $97
Delta
Delta
From $81

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 November 13, 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.
Southwest
8.0
Very good
4,236 reviews

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,236 reviews
Southwest
8.0
Very good
4,236 reviews

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
7.9
Good
8,007 reviews
Southwest
8.0
Very good
4,236 reviews

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
9,015 reviews
Southwest
8.0
Very good
4,236 reviews

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
JetBlue
7.2
Good
2,907 reviews
Southwest
8.0
Very good
4,236 reviews

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,114 reviews
Southwest
8.0
Very good
4,236 reviews

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

FAQs about flying to Boulder

  • Can I find cheaper flights to Boulder if I am willing to have layovers?

    Yes, flights with layovers are often cheaper than direct flights. Keep an eye out for flight deals to Boulder on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Boulder?

    Based on reviews from Cheapflights users, Frontier is rated the highest out of the airlines that fly to Boulder.

  • How much is a round-trip flight to Boulder?

    A round-trip flight to Boulder will typically cost around $981, however they can be found for as little as $58.

  • Where does the fastest flight to Boulder depart from?

    For those looking to save time traveling to Boulder, Colorado Springs offers the quickest one-way flight (0 hours 55 minutes).

  • Does Denver Intl have rental cars?

    Yes. Those touching down at Denver Intl can take advantage of the rental car services offered upon their arrival.

  • Are there hotels close to Denver Intl?

    Yes. Denver Intl has hotels nearby for those requiring accommodations. The Westin Denver International Airport is the closest property to Denver Intl (0.0 mi away from Denver Intl).

See more FAQs

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