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 $174, however they can be found for as little as $74.

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 50 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	$332
Round-trip from	$191
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 June 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 June 12, 2025.

Mon 10/205:31 pmLGA - DEN

1 stop6h 02mFrontier

Thu 10/234:14 pmDEN - LGA

Nonstop3h 52mFrontier

Deal found 6/10$189

Sat 9/62:29 pmLGA - DEN

Nonstop4h 24mDelta

Wed 9/106:25 amDEN - LGA

Nonstop3h 47mDelta

Deal found 6/10$197

Sat 8/167:55 pmJFK - DEN

Nonstop4h 54mDelta

Tue 8/1911:59 pmDEN - JFK

Nonstop4h 01mDelta

Deal found 6/10$197

Tue 11/116:59 amJFK - DEN

1 stop15h 16mFrontier

Fri 11/1412:04 amDEN - JFK

1 stop8h 20mFrontier

Deal found 6/9$203

Tue 8/128:10 pmJFK - DEN

Nonstop4h 46mJetBlue

Tue 8/2611:00 amDEN - JFK

Nonstop3h 59mJetBlue

Deal found 6/10$217

Tue 7/86:50 pmLGA - DEN

Nonstop4h 36mUnited Airlines

Tue 7/151:55 pmDEN - LGA

Nonstop3h 51mUnited Airlines

Deal found 6/10$232

Tue 7/152:55 pmLGA - DEN

1 stop7h 05mAmerican Airlines

Fri 7/1811:59 pmDEN - LGA

1 stop7h 05mAmerican Airlines

Deal found 6/12$252

Thu 9/2511:55 amEWR - DEN

1 stop21h 55mAllegiant Air

Sun 9/288:56 amDEN - EWR

1 stop22h 09mAllegiant Air

Deal found 6/12$255

Tue 7/2211:04 amEWR - DEN

1 stop12h 13mFrontier

Mon 7/2812:59 amDEN - EWR

1 stop7h 10mFrontier

Deal found 6/10$256

Tue 6/175:25 pmEWR - DEN

1 stop7h 31mAmerican Airlines

Thu 6/1911:59 pmDEN - EWR

1 stop7h 45mAmerican Airlines

Deal found 6/12$257

Thu 7/2411:25 amEWR - DEN

2 stops21h 45mMultiple Airlines

Fri 7/254:05 pmDEN - EWR

1 stop15h 00mMultiple Airlines

Deal found 6/11$261

Tue 7/86:50 pmEWR - DEN

1 stop6h 38mDelta

Mon 7/1412:55 amDEN - EWR

1 stop6h 05mDelta

Deal found 6/10$267

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 June 12, 2025.

Mon 8/1110:55 pmLGA - DEN

Nonstop4h 20mFrontier

Tue 8/1212:59 amDEN - LGA

1 stop7h 35mFrontier

Deal found 6/9$191

Sat 9/62:29 pmLGA - DEN

Nonstop4h 24mDelta

Wed 9/106:25 amDEN - LGA

Nonstop3h 47mDelta

Deal found 6/10$197

Tue 8/128:10 pmJFK - DEN

Nonstop4h 46mJetBlue

Tue 8/2611:00 amDEN - JFK

Nonstop3h 59mJetBlue

Deal found 6/10$217

Tue 7/86:50 pmLGA - DEN

Nonstop4h 36mUnited Airlines

Tue 7/151:55 pmDEN - LGA

Nonstop3h 51mUnited Airlines

Deal found 6/10$232

Tue 7/152:40 pmJFK - DEN

1 stop7h 20mAmerican Airlines

Tue 7/1511:59 pmDEN - JFK

1 stop8h 06mAmerican Airlines

Deal found 6/10$251

Thu 7/2411:25 amEWR - DEN

2 stops21h 45mMultiple Airlines

Fri 7/254:05 pmDEN - EWR

1 stop15h 00mMultiple Airlines

Deal found 6/11$261

Mon 8/49:55 pmLGA - DEN

Nonstop4h 25mSouthwest

Wed 8/131:00 pmDEN - LGA

1 stop6h 30mSouthwest

Deal found 6/10$297

Sat 7/1211:45 amEWR - DEN

1 stop11h 11mSun Country Air

Fri 7/185:49 pmDEN - EWR

1 stop14h 53mSun Country Air

Deal found 6/9$320

Sat 9/65:48 pmEWR - DEN

2 stops20h 22mAlaska Airlines

Tue 9/96:17 pmDEN - EWR

1 stop9h 42mAlaska Airlines

Deal found 6/11$346

Sun 8/178:33 pmSWF - DEN

2 stops21h 53mAllegiant Air

Thu 8/2111:58 amDEN - SWF

2 stops26h 48mAllegiant Air

Deal found 6/10$353

Sat 8/167:55 pmJFK - DEN

Nonstop4h 54mDelta

Tue 8/1911:59 pmDEN - JFK

Nonstop4h 01mDelta

Deal found 6/10$197

Wed 8/61:05 pmJFK - DEN

1 stop9h 18mFrontier

Tue 8/1212:34 amDEN - JFK

1 stop9h 05mFrontier

Deal found 6/11$210

Last-minute flights to Boulder
Discover last-minute flight deals to Boulder. Data last updated June 12, 2025 and is based on user searches.

Tue 6/175:25 pmEWR - DEN

1 stop7h 31mAmerican Airlines

Thu 6/1911:59 pmDEN - EWR

1 stop7h 45mAmerican Airlines

Deal found 6/12$257

Tue 6/171:10 pmJFK - DEN

1 stop10h 15mFrontier

Wed 6/258:30 pmDEN - JFK

1 stop13h 27mFrontier

Deal found 6/10$260

Wed 6/186:05 amLGA - DEN

2 stops8h 10mSouthwest

Wed 7/26:20 amDEN - LGA

Nonstop3h 40mSouthwest

Deal found 6/11$347

Fri 6/208:45 amJFK - DEN

Nonstop4h 28mDelta

Sat 6/2811:59 pmDEN - JFK

Nonstop4h 01mDelta

Deal found 6/10$333

Fri 6/206:00 amEWR - DEN

Nonstop4h 12mUnited Airlines

Tue 6/246:04 amDEN - EWR

Nonstop3h 45mUnited Airlines

Deal found 6/10$333

Fri 6/202:54 pmJFK - DEN

1 stop7h 07mAmerican Airlines

Tue 6/245:01 amDEN - JFK

1 stop6h 57mAmerican Airlines

Deal found 6/10$353

Fri 6/206:55 pmEWR - DEN

1 stop6h 27mDelta

Mon 6/2312:59 amDEN - EWR

1 stop6h 35mDelta

Deal found 6/10$353

Sat 6/2110:59 pmLGA - DEN

Nonstop4h 22mFrontier

Sun 6/228:58 amDEN - LGA

1 stop10h 01mFrontier

Deal found 6/10$240

Sat 6/2111:01 amEWR - DEN

1 stop12h 19mFrontier

Tue 6/2412:59 amDEN - EWR

1 stop7h 10mFrontier

Deal found 6/10$260

Sat 6/217:25 amLGA - DEN

Nonstop4h 12mDelta

Tue 6/246:40 amDEN - LGA

Nonstop3h 45mDelta

Deal found 6/10$332

Sat 6/218:05 amJFK - DEN

Nonstop4h 15mJetBlue

Wed 6/2511:54 pmDEN - JFK

Nonstop3h 46mJetBlue

Deal found 6/10$332

Sat 6/218:30 amLGA - DEN

1 stop9h 31mAmerican Airlines

Wed 6/251:50 pmDEN - LGA

1 stop7h 55mAmerican Airlines

Deal found 6/11$352

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 June 12, 2025.

Mon 7/2110:55 pmLGA - DEN

Nonstop4h 20mFrontier

Deal found 6/12$113

Wed 7/912:44 pmJFK - DEN

1 stop21h 37mFrontier

Deal found 6/10$115

Tue 7/84:15 pmJFK - DEN

Nonstop4h 50mDelta

Deal found 6/10$118

Tue 7/157:00 pmLGA - DEN

1 stop6h 44mAmerican Airlines

Deal found 6/12$119

Fri 7/188:18 pmJFK - DEN

Nonstop4h 41mJetBlue

Deal found 6/10$125

Tue 8/197:30 amJFK - DEN

1 stop11h 12mAmerican Airlines

Deal found 6/12$127

Fri 7/41:17 pmLGA - DEN

1 stop6h 55mUnited Airlines

Deal found 6/10$134

Wed 8/69:55 pmLGA - DEN

Nonstop4h 15mSouthwest

Deal found 6/10$139

Wed 7/21:35 pmLGA - DEN

3 stops30h 37mMultiple Airlines

Deal found 6/12$140

Tue 7/226:00 pmLGA - DEN

Nonstop4h 38mDelta

Deal found 6/11$149

Fri 7/46:50 pmEWR - DEN

Nonstop4h 27mUnited Airlines

Deal found 6/10$174

Thu 7/1711:25 amEWR - DEN

2 stops21h 45mMultiple Airlines

Deal found 6/10$175

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

Mon 10/20

5:31 pm-9:33 pm

1 stop6h 02m

Denver Intl

Thu 10/23

4:14 pm-10:06 pm

Nonstop3h 52m

$189

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

Sat 9/6

2:29 pm-4:53 pm

Nonstop4h 24m

Denver Intl

Wed 9/10

6:25 am-12:12 pm

Nonstop3h 47m

$197

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Sat 8/16

7:55 pm-10:49 pm

Nonstop4h 54m

Denver Intl

Tue 8/26

12:11 pm-6:35 pm

Nonstop4h 24m

$197

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Tue 11/11

6:59 am-8:15 pm

1 stop15h 16m

Denver Intl

Fri 11/14

12:04 am-10:24 am

1 stop8h 20m

$203

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Tue 8/12

8:10 pm-10:56 pm

Nonstop4h 46m

Denver Intl

Tue 8/26

11:00 am-4:59 pm

Nonstop3h 59m

$217

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

Tue 7/8

6:50 pm-9:26 pm

Nonstop4h 36m

Denver Intl

Tue 7/15

1:55 pm-7:46 pm

Nonstop3h 51m

$232

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

Tue 7/15

2:55 pm-8:00 pm

1 stop7h 05m

Denver Intl

Thu 7/17

11:59 pm-9:03 am

1 stop7h 04m

$252

NewarkDenver

EWR - DEN

EWRDEN

Newark

Thu 9/25

11:55 am-7:50 am

1 stop21h 55m

Denver Intl

Sun 9/28

8:56 am-9:05 am

1 stop22h 09m

$255

NewarkDenver

EWR - DEN

EWRDEN

Newark

Tue 7/22

11:04 am-9:17 pm

1 stop12h 13m

Denver Intl

Mon 7/28

12:59 am-10:09 am

1 stop7h 10m

$256

NewarkDenver

EWR - DEN

EWRDEN

Newark

Tue 7/15

5:00 am-9:08 am

1 stop6h 08m

Denver Intl

Tue 7/22

2:09 pm-10:40 pm

1 stop6h 31m

$257

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 45 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 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 8 hours 36 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 Thursday (54 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 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

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 Breeze Airways, Alaska Airlines and Southwest. 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.

Breeze Airways

8.1

Very good

178 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

Breeze Airways

8.1

Very good

178 reviews

Breeze Airways

8.1

Very good

178 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

Alaska Airlines

8.0

Very good

10,000 reviews

Breeze Airways

8.1

Very good

178 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

Southwest

8.0

Very good

4,287 reviews

Breeze Airways

8.1

Very good

178 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

Delta

8.0

Very good

7,950 reviews

Breeze Airways

8.1

Very good

178 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

Hawaiian Airlines

7.9

Good

2,494 reviews

Breeze Airways

8.1

Very good

178 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

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 $174, however they can be found for as little as $74.
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 50 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 7/21. 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 June 12, 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 June 12, 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 June 12, 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 June 12, 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 June 9, 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 Breeze Airways, Alaska Airlines and Southwest. 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 June 12, 2025.