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 $138, however they can be found for as little as $39.

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+ Save on Flights to Boulder

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Flights to Boulder in 2025

Popular in	December
Cheapest in	September
Average price	$356
Round-trip from	$198
One-way from	$113

Highest demand for flights based on searches. 0% potential increase in price ($2 potential increase over avg. RT 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 March 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 March 25, 2025.

Sat 5/2410:55 pmLGA - DEN

Nonstop4h 22mFrontier

Wed 5/284:14 pmDEN - LGA

Nonstop3h 51mFrontier

Deal found 3/24$198

Mon 4/78:09 pmJFK - DEN

Nonstop4h 49mJetBlue

Mon 4/1411:59 pmDEN - JFK

Nonstop3h 43mJetBlue

Deal found 3/24$226

Mon 4/77:25 amLGA - DEN

Nonstop4h 30mDelta

Tue 4/85:35 pmDEN - LGA

Nonstop3h 48mDelta

Deal found 3/24$227

Tue 6/246:37 pmLGA - DEN

Nonstop4h 35mUnited Airlines

Wed 7/25:53 pmDEN - LGA

Nonstop3h 51mUnited Airlines

Deal found 3/24$237

Wed 4/95:10 pmJFK - DEN

Nonstop4h 50mDelta

Sat 4/126:10 amDEN - JFK

Nonstop3h 53mDelta

Deal found 3/24$242

Mon 4/76:00 pmLGA - DEN

1 stop6h 39mAmerican Airlines

Tue 4/88:06 amDEN - LGA

1 stop6h 14mAmerican Airlines

Deal found 3/24$247

Sat 4/1911:21 amJFK - DEN

1 stop9h 09mSun Country Air

Sat 4/266:40 pmDEN - JFK

1 stop13h 43mSun Country Air

Deal found 3/24$250

Mon 4/73:59 pmJFK - DEN

1 stop7h 59mAmerican Airlines

Mon 4/147:20 amDEN - JFK

1 stop5h 38mAmerican Airlines

Deal found 3/24$261

Mon 5/56:59 amEWR - DEN

2 stops12h 28mMultiple Airlines

Thu 5/88:21 amDEN - EWR

1 stop22h 44mMultiple Airlines

Deal found 3/24$271

Mon 4/75:59 amEWR - DEN

Nonstop4h 23mUnited Airlines

Sun 4/136:02 amDEN - EWR

1 stop6h 07mUnited Airlines

Deal found 3/24$272

Sat 4/2611:21 amJFK - DEN

1 stop8h 21mMultiple Airlines

Sun 4/2712:05 amDEN - JFK

1 stop7h 58mMultiple Airlines

Deal found 3/24$273

Wed 4/2312:29 pmEWR - DEN

1 stop7h 11mAmerican Airlines

Wed 4/302:00 pmDEN - EWR

1 stop6h 07mAmerican Airlines

Deal found 3/24$275

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 March 25, 2025.

Sat 5/2410:55 pmLGA - DEN

Nonstop4h 22mFrontier

Wed 5/284:14 pmDEN - LGA

Nonstop3h 51mFrontier

Deal found 3/24$198

Mon 4/78:09 pmJFK - DEN

Nonstop4h 49mJetBlue

Mon 4/1411:59 pmDEN - JFK

Nonstop3h 43mJetBlue

Deal found 3/24$226

Mon 4/77:25 amLGA - DEN

Nonstop4h 30mDelta

Tue 4/85:35 pmDEN - LGA

Nonstop3h 48mDelta

Deal found 3/24$227

Mon 4/75:15 pmLGA - DEN

1 stop6h 30mUnited Airlines

Tue 4/811:43 amDEN - LGA

Nonstop3h 46mUnited Airlines

Deal found 3/24$237

Mon 4/76:00 pmLGA - DEN

1 stop6h 39mAmerican Airlines

Tue 4/88:06 amDEN - LGA

1 stop6h 14mAmerican Airlines

Deal found 3/24$247

Sat 4/1911:21 amJFK - DEN

1 stop9h 09mSun Country Air

Sat 4/266:40 pmDEN - JFK

1 stop13h 43mSun Country Air

Deal found 3/24$250

Mon 5/56:59 amEWR - DEN

2 stops12h 28mMultiple Airlines

Thu 5/88:21 amDEN - EWR

1 stop22h 44mMultiple Airlines

Deal found 3/24$271

Mon 5/127:25 amLGA - DEN

Nonstop4h 30mSouthwest

Sat 5/245:35 pmDEN - LGA

Nonstop3h 50mSouthwest

Deal found 3/24$278

Sun 4/611:55 amEWR - DEN

1 stop23h 58mAllegiant Air

Thu 4/108:21 amDEN - EWR

1 stop22h 44mAllegiant Air

Deal found 3/24$284

Thu 4/174:00 pmJFK - DEN

1 stop9h 58mAlaska Airlines

Tue 4/228:20 amDEN - JFK

2 stops20h 40mAlaska Airlines

Deal found 3/24$387

Wed 4/98:00 amJFK - DEN

Nonstop4h 44mDelta

Tue 4/1512:01 pmDEN - JFK

Nonstop3h 59mDelta

Deal found 3/24$242

Mon 4/73:25 pmJFK - DEN

1 stop7h 51mAmerican Airlines

Mon 4/146:30 amDEN - JFK

1 stop6h 28mAmerican Airlines

Deal found 3/24$261

Last-minute flights to Boulder
Discover last-minute flight deals to Boulder. Data last updated March 25, 2025 and is based on user searches.

Mon 3/311:00 pmJFK - DEN

1 stop13h 55mMultiple Airlines

Sat 4/266:40 pmDEN - JFK

1 stop13h 43mMultiple Airlines

Deal found 3/24$282

Tue 4/18:00 pmJFK - DEN

Nonstop4h 57mJetBlue

Sat 4/511:55 pmDEN - JFK

Nonstop3h 50mJetBlue

Deal found 3/24$227

Tue 4/16:59 amJFK - DEN

1 stop13h 48mFrontier

Sat 4/1212:14 amDEN - JFK

1 stop9h 45mFrontier

Deal found 3/24$278

Tue 4/110:57 amLGA - DEN

1 stop10h 34mFrontier

Sat 4/511:03 pmDEN - LGA

1 stop10h 57mFrontier

Deal found 3/24$340

Wed 4/29:55 amEWR - DEN

1 stop24h 31mMultiple Airlines

Fri 4/116:35 pmDEN - EWR

3 stops27h 23mMultiple Airlines

Deal found 3/24$281

Wed 4/26:00 pmLGA - DEN

Nonstop4h 38mDelta

Wed 4/97:15 amDEN - LGA

Nonstop3h 47mDelta

Deal found 3/24$303

Wed 4/29:55 amEWR - DEN

1 stop24h 31mAllegiant Air

Sun 4/69:16 amDEN - EWR

1 stop23h 49mAllegiant Air

Deal found 3/24$319

Wed 4/27:00 amEWR - DEN

1 stop7h 30mDelta

Tue 4/812:55 amDEN - EWR

1 stop7h 05mDelta

Deal found 3/24$323

Wed 4/26:35 pmLGA - DEN

Nonstop4h 32mUnited Airlines

Wed 4/94:07 pmDEN - LGA

1 stop5h 23mUnited Airlines

Deal found 3/24$348

Wed 4/25:59 amEWR - DEN

Nonstop4h 23mUnited Airlines

Mon 4/711:59 pmDEN - EWR

1 stop7h 55mUnited Airlines

Deal found 3/24$348

Fri 4/45:10 pmJFK - DEN

Nonstop4h 50mDelta

Mon 4/76:10 amDEN - JFK

Nonstop3h 53mDelta

Deal found 3/25$303

Fri 4/412:00 pmLGA - DEN

1 stop6h 44mAmerican Airlines

Mon 4/78:06 amDEN - LGA

1 stop6h 14mAmerican Airlines

Deal found 3/25$323

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 March 25, 2025.

Sat 5/3111:55 amEWR - DEN

1 stop7h 31mAllegiant Air

Deal found 3/24$113

Wed 4/97:15 amLGA - DEN

Nonstop4h 33mUnited Airlines

Deal found 3/24$114

Sat 4/58:00 pmJFK - DEN

Nonstop4h 57mJetBlue

Deal found 3/24$114

Sat 4/191:00 pmJFK - DEN

1 stop11h 59mFrontier

Deal found 3/24$116

Tue 6/1710:55 pmLGA - DEN

Nonstop4h 22mFrontier

Deal found 3/24$119

Sat 4/2611:21 amJFK - DEN

1 stop8h 21mSun Country Air

Deal found 3/24$120

Wed 4/96:00 amLGA - DEN

1 stop6h 23mAmerican Airlines

Deal found 3/24$124

Wed 4/95:10 pmJFK - DEN

Nonstop4h 50mDelta

Deal found 3/24$124

Tue 4/297:00 amEWR - DEN

1 stop18h 06mMultiple Airlines

Deal found 3/24$128

Wed 4/167:25 amLGA - DEN

Nonstop4h 30mDelta

Deal found 3/24$129

Tue 5/273:59 pmJFK - DEN

1 stop7h 57mAmerican Airlines

Deal found 3/24$129

Sun 4/137:30 amEWR - DEN

1 stop12h 05mSun Country Air

Deal found 3/24$132

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

Sat 5/24

10:55 pm-1:17 am

Nonstop4h 22m

Denver Intl

Wed 5/28

4:14 pm-10:05 pm

Nonstop3h 51m

$198

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Mon 4/7

8:09 pm-10:58 pm

Nonstop4h 49m

Denver Intl

Mon 4/14

11:59 pm-5:42 am

Nonstop3h 43m

$226

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

Mon 4/7

7:25 am-9:55 am

Nonstop4h 30m

Denver Intl

Tue 4/8

5:35 pm-11:23 pm

Nonstop3h 48m

$227

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

Tue 6/24

6:37 pm-9:12 pm

Nonstop4h 35m

Denver Intl

Wed 7/2

5:53 pm-11:44 pm

Nonstop3h 51m

$237

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Wed 4/9

8:00 am-10:44 am

Nonstop4h 44m

Denver Intl

Tue 4/15

12:01 pm-6:00 pm

Nonstop3h 59m

$242

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

Mon 4/7

6:00 pm-10:39 pm

1 stop6h 39m

Denver Intl

Tue 4/8

8:06 am-4:20 pm

1 stop6h 14m

$247

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Sat 4/19

11:21 am-6:30 pm

1 stop9h 09m

Denver Intl

Sat 4/26

6:40 pm-10:23 am

1 stop13h 43m

$250

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Mon 4/7

3:59 pm-9:58 pm

1 stop7h 59m

Denver Intl

Mon 4/14

7:20 am-2:58 pm

1 stop5h 38m

$261

NewarkDenver

EWR - DEN

EWRDEN

Newark

Mon 5/5

6:59 am-5:27 pm

2 stops12h 28m

Denver Intl

Thu 5/8

8:21 am-9:05 am

1 stop22h 44m

$271

NewarkDenver

EWR - DEN

EWRDEN

Newark

Mon 4/7

5:59 am-8:22 am

Nonstop4h 23m

Denver Intl

Sun 4/13

6:02 am-2:09 pm

1 stop6h 07m

$272

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

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 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 7 hours 44 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 Tuesday (46 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (5 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 Frontier.

United Airlines

From $194

Delta

From $150

Frontier

From $66

JetBlue

From $118

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

9,782 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines

8.0

Very good

9,782 reviews

Alaska Airlines

8.0

Very good

9,782 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Southwest

8.0

Very good

4,272 reviews

Alaska Airlines

8.0

Very good

9,782 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta

8.0

Very good

7,890 reviews

Alaska Airlines

8.0

Very good

9,782 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Hawaiian Airlines

7.9

Good

2,330 reviews

Alaska Airlines

8.0

Very good

9,782 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines

7.4

Good

8,605 reviews

Alaska Airlines

8.0

Very good

9,782 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 $138, however they can be found for as little as $39.
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 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

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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 March 25, 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 March 25, 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 March 25, 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 March 25, 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 March 21, 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

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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 March 25, 2025.