What is the cheapest month to fly to Boulder?

October is currently the cheapest month to fly to Boulder . At this moment in time March is the most expensive month. These prices are determined by multiple factors and booking in advance can help keep costs down if your schedule is not as flexible.

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 $824, however they can be found for as little as $73.

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 54 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).

$113+ Flights to Boulder

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Flights to Boulder in 2025

Popular in	December
Cheapest in	September
Average price	$360
Round-trip from	$198
One-way from	$113

Highest demand for flights based on searches. 0% potential increase in price.

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

From New York to Denver Intl

Search Deals

One-way flight from New York to Boulder

Search Deals

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 April 15, 2025.

Wed 6/1810:55 pmLGA - DEN

Nonstop4h 22mFrontier

Tue 6/244:14 pmDEN - LGA

Nonstop3h 51mFrontier

Deal found 4/14$198

Wed 7/236:50 pmLGA - DEN

Nonstop4h 36mUnited Airlines

Wed 7/301:55 pmDEN - LGA

Nonstop3h 51mUnited Airlines

Deal found 4/14$237

Thu 5/86:59 amJFK - DEN

1 stop18h 30mFrontier

Mon 5/129:59 amDEN - JFK

1 stop17h 31mFrontier

Deal found 4/14$240

Tue 8/125:59 pmLGA - DEN

Nonstop4h 40mDelta

Tue 8/196:40 amDEN - LGA

Nonstop3h 50mDelta

Deal found 4/14$242

Tue 8/57:59 amJFK - DEN

Nonstop4h 15mJetBlue

Sun 8/1711:55 pmDEN - JFK

Nonstop3h 47mJetBlue

Deal found 4/14$247

Fri 5/911:28 amJFK - DEN

1 stop7h 59mMultiple Airlines

Sat 5/1012:30 amDEN - JFK

1 stop7h 55mMultiple Airlines

Deal found 4/14$248

Sun 5/256:30 amLGA - DEN

Nonstop4h 20mSouthwest

Tue 6/35:35 pmDEN - LGA

Nonstop3h 50mSouthwest

Deal found 4/14$251

Thu 10/3011:31 amJFK - DEN

1 stop7h 51mSun Country Air

Sun 11/29:14 amDEN - JFK

1 stop23h 19mSun Country Air

Deal found 4/14$255

Mon 8/113:45 pmJFK - DEN

Nonstop4h 53mDelta

Tue 8/197:00 amDEN - JFK

Nonstop3h 54mDelta

Deal found 4/14$257

Tue 6/36:50 pmLGA - DEN

1 stop7h 09mAmerican Airlines

Tue 6/107:20 amDEN - LGA

1 stop6h 39mAmerican Airlines

Deal found 4/13$257

Wed 6/1111:45 amEWR - DEN

1 stop7h 22mMultiple Airlines

Fri 6/136:13 pmDEN - EWR

2 stops19h 21mMultiple Airlines

Deal found 4/13$268

Sat 5/1010:00 pmEWR - DEN

1 stop12h 38mFrontier

Mon 5/129:23 amDEN - EWR

1 stop9h 38mFrontier

Deal found 4/14$270

Best flights to Boulder
Discover carefully curated flight deals to Boulder that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 15, 2025.

Wed 6/1810:55 pmLGA - DEN

Nonstop4h 22mFrontier

Tue 6/244:14 pmDEN - LGA

Nonstop3h 51mFrontier

Deal found 4/14$198

Sat 5/317:25 amLGA - DEN

Nonstop4h 25mDelta

Sat 6/76:45 amDEN - LGA

Nonstop3h 40mDelta

Deal found 4/13$237

Thu 5/17:25 amLGA - DEN

Nonstop4h 33mUnited Airlines

Wed 5/78:20 amDEN - LGA

Nonstop3h 48mUnited Airlines

Deal found 4/13$247

Mon 5/1211:29 amJFK - DEN

1 stop7h 58mMultiple Airlines

Sun 5/1812:30 amDEN - JFK

1 stop7h 55mMultiple Airlines

Deal found 4/14$248

Sun 5/258:45 pmLGA - DEN

Nonstop4h 40mSouthwest

Tue 6/35:35 pmDEN - LGA

Nonstop3h 50mSouthwest

Deal found 4/14$251

Sat 5/248:20 pmJFK - DEN

Nonstop4h 39mJetBlue

Fri 5/302:38 pmDEN - JFK

Nonstop3h 51mJetBlue

Deal found 4/14$257

Sun 5/257:29 pmLGA - DEN

1 stop6h 04mAmerican Airlines

Tue 6/312:16 pmDEN - LGA

1 stop6h 23mAmerican Airlines

Deal found 4/14$262

Mon 4/2811:21 amJFK - DEN

1 stop7h 14mSun Country Air

Thu 5/16:30 pmDEN - JFK

1 stop14h 03mSun Country Air

Deal found 4/13$265

Tue 5/279:55 amEWR - DEN

1 stop28h 25mAllegiant Air

Mon 6/26:21 pmDEN - EWR

1 stop12h 44mAllegiant Air

Deal found 4/14$292

Tue 5/67:29 pmEWR - DEN

2 stops27h 46mAlaska Airlines

Tue 5/136:37 pmDEN - EWR

2 stops33h 53mAlaska Airlines

Deal found 4/14$396

Sat 5/106:59 amJFK - DEN

1 stop27h 19mFrontier

Mon 5/1210:52 pmDEN - JFK

1 stop28h 38mFrontier

Deal found 4/14$240

Mon 6/26:00 pmJFK - DEN

Nonstop4h 39mDelta

Thu 6/127:10 amDEN - JFK

Nonstop3h 49mDelta

Deal found 4/13$246

Last-minute flights to Boulder
Discover last-minute flight deals to Boulder. Data last updated April 15, 2025 and is based on user searches.

Sun 4/2011:38 amEWR - DEN

1 stop7h 37mSun Country Air

Thu 5/16:30 pmDEN - EWR

1 stop14h 14mSun Country Air

Deal found 4/13$335

Mon 4/2111:00 amJFK - DEN

1 stop14h 59mFrontier

Thu 5/111:59 pmDEN - JFK

1 stop8h 01mFrontier

Deal found 4/13$270

Mon 4/218:05 amJFK - DEN

Nonstop4h 44mDelta

Wed 4/3012:01 pmDEN - JFK

Nonstop3h 59mDelta

Deal found 4/13$323

Mon 4/216:00 pmLGA - DEN

Nonstop4h 36mDelta

Thu 5/15:30 pmDEN - LGA

Nonstop3h 48mDelta

Deal found 4/13$323

Tue 4/226:15 amLGA - DEN

1 stop6h 46mAmerican Airlines

Mon 4/284:17 pmDEN - LGA

1 stop5h 26mAmerican Airlines

Deal found 4/13$343

Tue 4/223:29 pmLGA - DEN

Nonstop4h 33mUnited Airlines

Mon 4/285:42 pmDEN - LGA

Nonstop3h 48mUnited Airlines

Deal found 4/14$358

Wed 4/2310:00 pmEWR - DEN

1 stop12h 30mFrontier

Fri 4/259:15 amDEN - EWR

1 stop9h 50mFrontier

Deal found 4/13$290

Wed 4/2310:50 pmLGA - DEN

1 stop10h 00mFrontier

Mon 4/2812:05 amDEN - LGA

1 stop18h 54mFrontier

Deal found 4/14$342

Thu 4/246:59 amEWR - DEN

1 stop7h 23mDelta

Wed 4/3012:55 amDEN - EWR

1 stop6h 04mDelta

Deal found 4/13$343

Thu 4/244:30 pmEWR - DEN

Nonstop4h 38mUnited Airlines

Sun 5/46:00 amDEN - EWR

Nonstop3h 43mUnited Airlines

Deal found 4/13$358

Thu 4/2411:21 amJFK - DEN

1 stop7h 34mMultiple Airlines

Sun 4/2711:59 pmDEN - JFK

1 stop8h 27mMultiple Airlines

Deal found 4/13$385

Thu 4/2411:21 amJFK - DEN

1 stop7h 34mSun Country Air

Mon 4/285:30 pmDEN - JFK

1 stop14h 53mSun Country Air

Deal found 4/14$407

One-way flights to Boulder
Search for one-way flight options to Boulder. Find affordable one-way fares based on user searches. Data last updated April 15, 2025.

Sat 5/3111:55 amEWR - DEN

1 stop7h 31mAllegiant Air

Deal found 4/14$113

Sat 6/2810:55 pmLGA - DEN

Nonstop4h 22mFrontier

Deal found 4/13$114

Mon 5/126:30 amLGA - DEN

1 stop11h 16mMultiple Airlines

Deal found 4/14$115

Mon 5/126:00 amJFK - DEN

1 stop19h 04mFrontier

Deal found 4/13$117

Tue 6/177:25 amLGA - DEN

Nonstop4h 12mDelta

Deal found 4/13$119

Fri 5/98:15 amEWR - DEN

1 stop11h 12mSun Country Air

Deal found 4/14$120

Mon 5/194:59 pmEWR - DEN

1 stop17h 30mMultiple Airlines

Deal found 4/13$121

Thu 5/811:29 amJFK - DEN

1 stop7h 58mSun Country Air

Deal found 4/14$123

Wed 5/712:30 pmLGA - DEN

Nonstop4h 30mUnited Airlines

Deal found 4/14$126

Wed 5/710:00 pmEWR - DEN

1 stop12h 33mFrontier

Deal found 4/14$126

Sat 6/75:45 amLGA - DEN

1 stop7h 47mAmerican Airlines

Deal found 4/14$129

Thu 5/18:05 amJFK - DEN

Nonstop4h 44mDelta

Deal found 4/14$134

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

LGA - DEN

LGADEN

New York LaGuardia

Wed 6/18

10:55 pm-1:17 am

Nonstop4h 22m

Denver Intl

Tue 6/24

4:14 pm-10:05 pm

Nonstop3h 51m

$198

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Thu 5/8

6:59 am-11:29 pm

1 stop18h 30m

Denver Intl

Mon 5/12

9:59 am-5:30 am

1 stop17h 31m

$240

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

Sat 5/17

7:25 am-9:50 am

Nonstop4h 25m

Denver Intl

Sat 5/31

6:45 am-12:25 pm

Nonstop3h 40m

$242

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Thu 5/1

8:29 am-11:17 am

Nonstop4h 48m

Denver Intl

Sun 5/4

11:59 pm-5:42 am

Nonstop3h 43m

$247

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

Thu 5/1

7:25 am-9:58 am

Nonstop4h 33m

Denver Intl

Wed 5/7

8:20 am-2:08 pm

Nonstop3h 48m

$247

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Fri 5/9

11:28 am-5:27 pm

1 stop7h 59m

Denver Intl

Sat 5/10

12:30 am-10:25 am

1 stop7h 55m

$248

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

Sun 5/25

8:45 pm-11:25 pm

Nonstop4h 40m

Denver Intl

Tue 6/3

5:35 pm-11:25 pm

Nonstop3h 50m

$251

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

Tue 6/3

6:50 pm-11:59 pm

1 stop7h 09m

Denver Intl

Tue 6/10

7:20 am-3:59 pm

1 stop6h 39m

$257

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Sat 5/24

6:00 pm-8:39 pm

Nonstop4h 39m

Denver Intl

Wed 5/28

7:06 am-1:00 pm

Nonstop3h 54m

$257

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Mon 4/28

11:21 am-4:35 pm

1 stop7h 14m

Denver Intl

Thu 5/1

6:30 pm-10:33 am

1 stop14h 03m

$265

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

Showing 1-10 of 48 results

...

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?

Booking 60 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 8 hours 5 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?

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 at noon, 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 (44 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (27 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.

United Airlines

From $194

Delta

From $148

JetBlue

From $121

Frontier

From $66

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

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

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

Read through reviews of airlines servicing Boulder, such as Alaska Airlines, Southwest and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,871 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Alaska Airlines

8.0

Very good

9,871 reviews

Alaska Airlines

8.0

Very good

9,871 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Southwest

8.0

Very good

4,279 reviews

Alaska Airlines

8.0

Very good

9,871 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Delta

8.0

Very good

7,916 reviews

Alaska Airlines

8.0

Very good

9,871 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Hawaiian Airlines

7.9

Good

2,373 reviews

Alaska Airlines

8.0

Very good

9,871 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

United Airlines

7.4

Good

8,656 reviews

Alaska Airlines

8.0

Very good

9,871 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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 $824, however they can be found for as little as $73.
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 54 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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$113+ 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 5/31. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights to Boulder with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 April 15, 2025.

Popular in

Cheapest in

Average price

Round-trip from

One-way from

Find flight deals to Boulder

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 April 15, 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 April 15, 2025.

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 April 15, 2025.

Use the filters below to find and compare flights to Boulder that are best for you.

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 April 11, 2025.

How long is the flight to Boulder?

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 June 30, 2024.

Weekly flight availability to Boulder

What are the most popular airlines that fly to Boulder?

What are the cheapest airlines that fly to Boulder?

Rainfall in Boulder by month

Plan your trip to Boulder by taking into account the average rainfall totals by month.

Temperature in Boulder by month

Plan your trip to Boulder by taking into account the average temperature totals by month.

Reviews of airlines servicing Boulder

Read through reviews of airlines servicing Boulder, such as Alaska Airlines, Southwest and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

FAQs about flying to Boulder

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

What is the best airline to fly to Boulder?

How much is a round-trip flight to Boulder?

Where does the fastest flight to Boulder depart from?

Does Denver Intl have rental cars?

Are there hotels close to Denver Intl?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Search flights to Boulder by cabin class

Find flights to Boulder, based on your preferred cabin class, be it economy, premium economy, business, or first class.

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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 April 15, 2025.