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 $686, 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 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).

$117+ Flights to Boulder - Compare & Save Big

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Flights to Boulder in 2025

Popular in	December
Cheapest in	September
Average price	$365
Round-trip from	$200
One-way from	$117

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

Search Deals

Cheapest flight prices on average. 1% 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 30, 2025.

Sat 6/79:55 pmLGA - DEN

Nonstop4h 22mFrontier

Fri 6/134:14 pmDEN - LGA

Nonstop3h 51mFrontier

Deal found 4/28$200

Tue 5/131:00 pmJFK - DEN

1 stop12h 17mFrontier

Fri 5/167:12 pmDEN - JFK

1 stop13h 13mFrontier

Deal found 4/29$236

Fri 5/307:25 amLGA - DEN

Nonstop4h 25mDelta

Tue 6/36:45 amDEN - LGA

Nonstop3h 40mDelta

Deal found 4/28$242

Fri 7/187:55 pmJFK - DEN

Nonstop4h 54mDelta

Sun 7/2011:59 pmDEN - JFK

Nonstop4h 01mDelta

Deal found 4/28$247

Thu 10/3011:31 amJFK - DEN

1 stop7h 51mSun Country Air

Sun 11/26:29 pmDEN - JFK

1 stop14h 04mSun Country Air

Deal found 4/28$255

Thu 7/178:10 pmJFK - DEN

Nonstop4h 46mJetBlue

Fri 7/2511:55 pmDEN - JFK

Nonstop3h 47mJetBlue

Deal found 4/27$257

Tue 7/87:20 amLGA - DEN

1 stop7h 12mUnited Airlines

Tue 7/85:53 pmDEN - LGA

Nonstop3h 51mUnited Airlines

Deal found 4/28$261

Thu 5/291:59 pmLGA - DEN

1 stop6h 48mAmerican Airlines

Wed 6/410:56 amDEN - LGA

1 stop6h 56mAmerican Airlines

Deal found 4/29$262

Fri 7/49:08 amJFK - DEN

2 stops8h 34mAmerican Airlines

Sat 7/125:00 amDEN - JFK

1 stop6h 56mAmerican Airlines

Deal found 4/29$272

Sat 5/242:00 pmEWR - DEN

2 stops30h 19mMultiple Airlines

Fri 5/306:21 pmDEN - EWR

1 stop14h 44mMultiple Airlines

Deal found 4/29$279

Sat 7/56:59 amEWR - DEN

Nonstop4h 16mUnited Airlines

Tue 7/157:11 pmDEN - EWR

Nonstop3h 49mUnited Airlines

Deal found 4/29$282

Thu 6/511:04 amEWR - DEN

1 stop12h 17mFrontier

Sun 6/812:59 amDEN - EWR

1 stop7h 10mFrontier

Deal found 4/29$284

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 30, 2025.

Sat 6/79:55 pmLGA - DEN

Nonstop4h 22mFrontier

Fri 6/134:14 pmDEN - LGA

Nonstop3h 51mFrontier

Deal found 4/28$200

Thu 5/297:25 amLGA - DEN

Nonstop4h 25mDelta

Sat 5/316:45 amDEN - LGA

Nonstop3h 40mDelta

Deal found 4/28$242

Thu 7/178:10 pmJFK - DEN

Nonstop4h 46mJetBlue

Thu 7/2411:55 pmDEN - JFK

Nonstop3h 47mJetBlue

Deal found 4/28$257

Tue 7/87:20 amLGA - DEN

1 stop7h 12mUnited Airlines

Tue 7/85:53 pmDEN - LGA

Nonstop3h 51mUnited Airlines

Deal found 4/28$261

Thu 5/291:59 pmLGA - DEN

1 stop6h 48mAmerican Airlines

Wed 6/410:56 amDEN - LGA

1 stop6h 56mAmerican Airlines

Deal found 4/29$262

Sat 5/242:00 pmEWR - DEN

2 stops30h 19mMultiple Airlines

Fri 5/306:21 pmDEN - EWR

1 stop14h 44mMultiple Airlines

Deal found 4/29$279

Mon 5/511:41 amEWR - DEN

1 stop7h 46mSun Country Air

Fri 5/306:30 pmDEN - EWR

1 stop14h 14mSun Country Air

Deal found 4/28$305

Wed 5/286:10 amLGA - DEN

2 stops8h 50mSouthwest

Fri 5/307:50 amDEN - LGA

1 stop7h 45mSouthwest

Deal found 4/28$332

Wed 6/47:46 amEWR - DEN

2 stops12h 23mAlaska Airlines

Sat 6/76:00 amDEN - EWR

1 stop21h 59mAlaska Airlines

Deal found 4/28$405

Sat 6/76:59 amJFK - DEN

1 stop9h 41mFrontier

Sun 6/1511:58 pmDEN - JFK

1 stop8h 25mFrontier

Deal found 4/29$234

Fri 7/187:55 pmJFK - DEN

Nonstop4h 54mDelta

Sun 7/2011:59 pmDEN - JFK

Nonstop4h 01mDelta

Deal found 4/28$247

Fri 7/49:08 amJFK - DEN

2 stops8h 34mAmerican Airlines

Sat 7/125:00 amDEN - JFK

1 stop6h 56mAmerican Airlines

Deal found 4/29$272

Last-minute flights to Boulder
Discover last-minute flight deals to Boulder. Data last updated April 30, 2025 and is based on user searches.

Mon 5/55:30 pmLGA - DEN

1 stop7h 34mFrontier

Thu 5/294:19 pmDEN - LGA

Nonstop3h 51mFrontier

Deal found 4/28$245

Mon 5/511:41 amEWR - DEN

1 stop7h 46mSun Country Air

Fri 5/306:30 pmDEN - EWR

1 stop14h 14mSun Country Air

Deal found 4/28$305

Tue 5/65:59 amEWR - DEN

1 stop7h 10mDelta

Mon 5/1212:59 amDEN - EWR

1 stop6h 35mDelta

Deal found 4/28$322

Tue 5/612:55 pmJFK - DEN

1 stop6h 12mDelta

Wed 5/217:06 amDEN - JFK

Nonstop3h 54mDelta

Deal found 4/29$343

Tue 5/610:00 amLGA - DEN

Nonstop4h 33mUnited Airlines

Sat 5/245:53 pmDEN - LGA

Nonstop3h 51mUnited Airlines

Deal found 4/27$358

Tue 5/610:15 amEWR - DEN

Nonstop4h 28mUnited Airlines

Tue 5/1311:59 pmDEN - EWR

Nonstop3h 42mUnited Airlines

Deal found 4/28$358

Wed 5/76:59 amJFK - DEN

1 stop13h 58mFrontier

Sun 5/1811:59 pmDEN - JFK

1 stop8h 01mFrontier

Deal found 4/28$258

Wed 5/710:00 pmEWR - DEN

1 stop12h 33mFrontier

Sun 5/119:23 amDEN - EWR

1 stop9h 38mFrontier

Deal found 4/28$290

Wed 5/78:20 pmJFK - DEN

Nonstop4h 39mJetBlue

Thu 5/2911:59 pmDEN - JFK

Nonstop3h 49mJetBlue

Deal found 4/28$323

Thu 5/810:00 pmEWR - DEN

1 stop12h 38mMultiple Airlines

Mon 5/126:30 pmDEN - EWR

1 stop16h 26mMultiple Airlines

Deal found 4/28$283

Fri 5/95:50 pmLGA - DEN

Nonstop4h 38mDelta

Mon 5/126:45 amDEN - LGA

Nonstop3h 40mDelta

Deal found 4/28$323

Fri 5/92:30 pmJFK - DEN

1 stop7h 46mAmerican Airlines

Fri 5/1612:16 pmDEN - JFK

1 stop6h 44mAmerican Airlines

Deal found 4/28$344

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 30, 2025.

Sat 5/3111:55 amEWR - DEN

1 stop7h 31mAllegiant Air

Deal found 4/27$117

Fri 7/1810:55 pmLGA - DEN

Nonstop4h 22mFrontier

Deal found 4/28$118

Tue 6/246:37 pmLGA - DEN

Nonstop4h 35mUnited Airlines

Deal found 4/27$119

Wed 5/281:00 pmJFK - DEN

1 stop12h 57mFrontier

Deal found 4/29$124

Wed 5/289:55 amLGA - DEN

3 stops34h 25mMultiple Airlines

Deal found 4/29$125

Tue 7/156:05 pmLGA - DEN

1 stop7h 39mAmerican Airlines

Deal found 4/29$129

Tue 5/205:50 pmLGA - DEN

Nonstop4h 38mDelta

Deal found 4/28$133

Wed 6/258:20 pmJFK - DEN

Nonstop4h 39mJetBlue

Deal found 4/27$134

Tue 6/246:53 amEWR - DEN

1 stop23h 08mMultiple Airlines

Deal found 4/27$138

Wed 6/182:55 pmJFK - DEN

1 stop7h 05mAmerican Airlines

Deal found 4/29$139

Tue 5/2011:50 amLGA - DEN

1 stop8h 35mSouthwest

Deal found 4/28$142

Thu 5/810:00 pmEWR - DEN

1 stop12h 38mFrontier

Deal found 4/29$142

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 6/7

9:55 pm-12:17 am

Nonstop4h 22m

Denver Intl

Fri 6/13

4:14 pm-10:05 pm

Nonstop3h 51m

$200

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Tue 5/13

1:00 pm-11:17 pm

1 stop12h 17m

Denver Intl

Fri 5/16

7:12 pm-10:25 am

1 stop13h 13m

$236

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

Fri 5/30

7:25 am-9:50 am

Nonstop4h 25m

Denver Intl

Tue 6/3

6:45 am-12:25 pm

Nonstop3h 40m

$242

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Fri 7/18

8:10 pm-10:56 pm

Nonstop4h 46m

Denver Intl

Sun 7/27

11:55 pm-5:42 am

Nonstop3h 47m

$247

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Sat 6/7

11:27 am-9:19 am

1 stop23h 52m

Denver Intl

Fri 6/13

6:13 pm-10:31 am

1 stop14h 18m

$255

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

Tue 7/8

7:20 am-12:32 pm

1 stop7h 12m

Denver Intl

Tue 7/8

5:53 pm-11:44 pm

Nonstop3h 51m

$261

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

Thu 5/29

1:59 pm-6:47 pm

1 stop6h 48m

Denver Intl

Wed 6/4

10:56 am-7:52 pm

1 stop6h 56m

$262

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Wed 7/9

7:55 pm-10:49 pm

Nonstop4h 54m

Denver Intl

Mon 7/14

11:59 pm-6:00 am

Nonstop4h 01m

$267

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

Fri 7/4

9:08 am-3:42 pm

2 stops8h 34m

Denver Intl

Sat 7/12

5:00 am-1:56 pm

1 stop6h 56m

$272

NewarkDenver

EWR - DEN

EWRDEN

Newark

Sat 5/24

2:00 pm-6:19 pm

2 stops30h 19m

Denver Intl

Fri 5/30

6:21 pm-11:05 am

1 stop14h 44m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/27

Showing 1-10 of 46 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 7 hours 35 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 (43 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.

United Airlines

From $194

Delta

From $150

JetBlue

From $122

Frontier

From $67

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

160 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

160 reviews

Breeze Airways

8.1

Very good

160 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

9,961 reviews

Breeze Airways

8.1

Very good

160 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

4,295 reviews

Breeze Airways

8.1

Very good

160 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

7,929 reviews

Breeze Airways

8.1

Very good

160 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

2,405 reviews

Breeze Airways

8.1

Very good

160 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 $686, 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 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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$117+ 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 April 30, 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 30, 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 30, 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 30, 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 25, 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

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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 30, 2025.