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 $1,052, however they can be found for as little as $62.

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).

$88+ Cheap Flights to Boulder

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2. Select your favorite providers

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3. Compare prices and book

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Flights to Boulder in 2025

Popular in	December
Cheapest in	October
Average price	$282
Round-trip from	$125
One-way from	$88

Highest demand for flights based on searches. 2% 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 September 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 9月 16, 2025.

週五 10/241:00 pmJFK - DEN

Nonstop4h 24mFrontier

週五 10/2412:36 amDEN - JFK

1 stop7h 48mFrontier

Deal found 9/14$125

週三 10/81:00 pmJFK - DEN

Nonstop4h 24mFrontier

週三 10/226:10 amDEN - JFK

Nonstop3h 51mFrontier

Deal found 9/15$130

週四 9/1810:56 pmLGA - DEN

Nonstop4h 08mFrontier

週五 9/1912:04 amDEN - LGA

1 stop9h 57mFrontier

Deal found 9/14$131

週三 10/221:00 pmJFK - DEN

Nonstop4h 24mFrontier

週一 10/276:10 amDEN - JFK

Nonstop3h 51mFrontier

Deal found 9/15$131

週三 10/81:00 pmJFK - DEN

Nonstop4h 24mFrontier

週三 10/811:59 pmDEN - JFK

1 stop8h 01mFrontier

Deal found 9/14$132

週四 11/610:55 pmLGA - DEN

Nonstop4h 13mFrontier

週五 11/712:16 amDEN - LGA

1 stop7h 51mFrontier

Deal found 9/14$133

週四 10/210:56 pmLGA - DEN

Nonstop4h 08mFrontier

週二 10/74:08 pmDEN - LGA

Nonstop3h 52mFrontier

Deal found 9/14$134

週六 9/2710:56 pmLGA - DEN

Nonstop4h 08mFrontier

週六 10/44:14 pmDEN - LGA

Nonstop3h 57mFrontier

Deal found 9/14$136

週三 10/151:00 pmJFK - DEN

Nonstop4h 24mFrontier

週三 10/1512:36 amDEN - JFK

1 stop7h 48mFrontier

Deal found 9/15$138

週二 10/1410:55 pmLGA - DEN

Nonstop4h 13mFrontier

週二 10/214:08 pmDEN - LGA

Nonstop3h 52mFrontier

Deal found 9/14$139

週三 10/151:00 pmJFK - DEN

Nonstop4h 24mFrontier

週一 10/2012:59 amDEN - JFK

1 stop9h 00mFrontier

Deal found 9/14$139

週三 10/221:00 pmJFK - DEN

Nonstop4h 24mFrontier

週五 10/2412:59 amDEN - JFK

1 stop9h 00mFrontier

Deal found 9/15$140

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 9月 16, 2025.

週三 10/157:00 amLGA - DEN

Nonstop4h 17mUnited Airlines

週五 10/175:34 pmDEN - LGA

Nonstop3h 48mUnited Airlines

Deal found 9/13$207

週五 11/148:55 pmJFK - DEN

Nonstop4h 40mDelta

週日 11/1612:20 pmDEN - JFK

Nonstop3h 54mDelta

Deal found 9/15$217

週四 11/138:25 amJFK - DEN

Nonstop4h 40mJetBlue

週二 11/1811:50 amDEN - JFK

Nonstop3h 39mJetBlue

Deal found 9/15$217

週三 10/157:20 amLGA - DEN

Nonstop4h 25mSouthwest

週三 10/226:20 amDEN - LGA

Nonstop3h 40mSouthwest

Deal found 9/14$227

週四 10/3011:43 amSWF - DEN

1 stop13h 33mMultiple Airlines

週六 11/112:16 amDEN - SWF

1 stop9h 47mMultiple Airlines

Deal found 9/15$432

週二 10/218:30 amJFK - DEN

Nonstop4h 34mDelta

週六 10/257:10 amDEN - JFK

Nonstop3h 49mDelta

Deal found 9/14$217

週四 10/98:10 amJFK - DEN

Nonstop4h 30mJetBlue

週三 10/1511:25 amDEN - JFK

Nonstop3h 46mJetBlue

Deal found 9/14$237

週三 10/87:20 amLGA - DEN

Nonstop4h 25mSouthwest

週三 10/156:20 amDEN - LGA

Nonstop3h 40mSouthwest

Deal found 9/14$237

週四 11/138:55 pmJFK - DEN

Nonstop4h 40mDelta

週二 11/1811:59 pmDEN - JFK

Nonstop4h 01mDelta

Deal found 9/15$217

週一 1/510:00 amLGA - DEN

Nonstop4h 38mUnited Airlines

週四 1/87:50 amDEN - LGA

1 stop5h 33mUnited Airlines

Deal found 9/15$247

週五 11/148:25 amJFK - DEN

Nonstop4h 41mDelta

週二 11/1811:59 pmDEN - JFK

Nonstop4h 01mDelta

Deal found 9/15$217

週六 10/256:10 amLGA - DEN

Nonstop4h 20mSouthwest

週六 10/2511:15 amDEN - LGA

1 stop7h 15mSouthwest

Deal found 9/14$247

週五 2/276:30 pmLGA - DEN

Nonstop4h 32mUnited Airlines

週一 3/27:45 amDEN - LGA

1 stop7h 24mUnited Airlines

Deal found 9/15$247

週四 11/138:25 amJFK - DEN

Nonstop4h 41mDelta

週日 11/1611:59 pmDEN - JFK

Nonstop4h 01mDelta

Deal found 9/14$217

週一 10/137:00 amLGA - DEN

Nonstop4h 17mUnited Airlines

週三 10/154:10 pmDEN - LGA

Nonstop3h 48mUnited Airlines

Deal found 9/15$257

週六 10/258:30 amJFK - DEN

Nonstop4h 34mDelta

週六 11/17:10 amDEN - JFK

Nonstop3h 50mDelta

Deal found 9/15$217

週一 11/37:00 pmJFK - DEN

Nonstop4h 41mDelta

週四 11/611:59 pmDEN - JFK

Nonstop4h 01mDelta

Deal found 9/15$217

週二 9/239:00 pmEWR - DEN

Nonstop4h 17mUnited Airlines

週二 9/307:46 amDEN - EWR

Nonstop3h 43mUnited Airlines

Deal found 9/14$287

週二 11/47:30 amLGA - DEN

Nonstop4h 22mDelta

週五 11/75:50 pmDEN - LGA

Nonstop3h 46mDelta

Deal found 9/14$217

週五 11/77:30 amLGA - DEN

Nonstop4h 22mDelta

週二 11/116:49 amDEN - LGA

Nonstop3h 41mDelta

Deal found 9/14$217

週五 11/146:10 amEWR - DEN

Nonstop4h 24mUnited Airlines

週二 11/189:51 amDEN - EWR

Nonstop3h 44mUnited Airlines

Deal found 9/15$297

週五 10/2412:24 pmSWF - DEN

2 stops12h 52mMultiple Airlines

週六 11/112:16 amDEN - SWF

1 stop9h 47mMultiple Airlines

Deal found 9/14$449

週五 10/248:57 pmEWR - DEN

Nonstop4h 18mUnited Airlines

週四 10/306:00 amDEN - EWR

Nonstop3h 44mUnited Airlines

Deal found 9/15$297

週五 10/37:55 pmJFK - DEN

Nonstop4h 40mDelta

週二 10/1411:59 pmDEN - JFK

Nonstop4h 01mDelta

Deal found 9/14$227

週四 10/27:11 pmSWF - DEN

2 stops22h 18mMultiple Airlines

週六 10/412:04 amDEN - SWF

1 stop8h 59mMultiple Airlines

Deal found 9/14$452

週四 11/139:07 pmEWR - DEN

Nonstop4h 31mUnited Airlines

週二 11/189:51 amDEN - EWR

Nonstop3h 44mUnited Airlines

Deal found 9/15$297

週三 11/194:15 pmJFK - DEN

Nonstop4h 32mDelta

週三 11/267:10 amDEN - JFK

Nonstop3h 43mDelta

Deal found 9/15$227

週五 10/2412:24 pmSWF - DEN

2 stops12h 52mMultiple Airlines

週六 10/2512:36 amDEN - SWF

1 stop8h 27mMultiple Airlines

Deal found 9/14$471

週一 10/209:00 pmEWR - DEN

Nonstop4h 18mUnited Airlines

週二 10/2811:50 pmDEN - EWR

Nonstop3h 35mUnited Airlines

Deal found 9/15$297

週二 11/118:25 amJFK - DEN

Nonstop4h 41mDelta

週四 11/1311:59 pmDEN - JFK

Nonstop4h 01mDelta

Deal found 9/14$237

Last-minute flights to Boulder
Discover last-minute flight deals to Boulder. Data last updated 9月 16, 2025 and is based on user searches.

週四 9/1810:56 pmLGA - DEN

Nonstop4h 08mFrontier

週五 9/1912:04 amDEN - LGA

1 stop9h 57mFrontier

Deal found 9/14$131

週六 9/2710:56 pmLGA - DEN

Nonstop4h 08mFrontier

週六 10/44:14 pmDEN - LGA

Nonstop3h 57mFrontier

Deal found 9/14$136

週四 10/210:56 pmLGA - DEN

Nonstop4h 08mFrontier

週二 10/74:08 pmDEN - LGA

Nonstop3h 52mFrontier

Deal found 9/14$134

週三 10/81:00 pmJFK - DEN

Nonstop4h 24mFrontier

週三 10/226:10 amDEN - JFK

Nonstop3h 51mFrontier

Deal found 9/15$130

週三 10/81:00 pmJFK - DEN

Nonstop4h 24mFrontier

週三 10/811:59 pmDEN - JFK

1 stop8h 01mFrontier

Deal found 9/14$132

週二 10/1410:55 pmLGA - DEN

Nonstop4h 13mFrontier

週二 10/214:08 pmDEN - LGA

Nonstop3h 52mFrontier

Deal found 9/14$139

週三 10/151:00 pmJFK - DEN

Nonstop4h 24mFrontier

週三 10/1512:36 amDEN - JFK

1 stop7h 48mFrontier

Deal found 9/15$138

週三 10/151:00 pmJFK - DEN

Nonstop4h 24mFrontier

週一 10/2012:59 amDEN - JFK

1 stop9h 00mFrontier

Deal found 9/14$139

週三 10/221:00 pmJFK - DEN

Nonstop4h 24mFrontier

週一 10/276:10 amDEN - JFK

Nonstop3h 51mFrontier

Deal found 9/15$131

週三 10/221:00 pmJFK - DEN

Nonstop4h 24mFrontier

週五 10/2412:59 amDEN - JFK

1 stop9h 00mFrontier

Deal found 9/15$140

週五 10/241:00 pmJFK - DEN

Nonstop4h 24mFrontier

週五 10/2412:36 amDEN - JFK

1 stop7h 48mFrontier

Deal found 9/14$125

週五 10/245:03 pmLGA - DEN

1 stop8h 13mFrontier

週六 10/254:08 pmDEN - LGA

Nonstop3h 52mFrontier

Deal found 9/14$133

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 9月 16, 2025.

週四 11/610:55 pmLGA - DEN

Nonstop4h 13mFrontier

Deal found 9/15$88

週三 10/294:00 pmJFK - DEN

Nonstop4h 26mFrontier

Deal found 9/16$89

週一 9/2210:00 pmLGA - DEN

1 stop13h 01mFrontier

Deal found 9/15$89

週四 10/95:31 pmLGA - DEN

1 stop28h 26mFrontier

Deal found 9/15$90

週日 11/164:30 pmLGA - DEN

1 stop29h 36mFrontier

Deal found 9/14$91

週一 10/2010:00 pmLGA - DEN

1 stop12h 52mFrontier

Deal found 9/14$92

週三 12/101:00 pmJFK - DEN

Nonstop4h 26mFrontier

Deal found 9/14$93

週一 11/310:55 pmLGA - DEN

1 stop10h 16mFrontier

Deal found 9/15$93

週三 12/31:00 pmJFK - DEN

Nonstop4h 26mFrontier

Deal found 9/14$94

週六 10/114:32 pmLGA - DEN

1 stop8h 44mFrontier

Deal found 9/15$97

週二 10/146:30 amLGA - DEN

1 stop7h 29mFrontier

Deal found 9/15$98

週三 11/1211:00 amJFK - DEN

1 stop22h 41mFrontier

Deal found 9/15$99

Fly from

Route

Depart

Return

Price

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

週三 10/15

7:00 am-9:17 am

Nonstop4h 17m

Denver Intl

週五 10/17

5:34 pm-11:22 pm

Nonstop3h 48m

$207

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

週五 11/14

8:55 pm-11:35 pm

Nonstop4h 40m

Denver Intl

週日 11/16

12:20 pm-6:14 pm

Nonstop3h 54m

$217

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

週四 11/13

8:25 am-11:05 am

Nonstop4h 40m

Denver Intl

週二 11/18

11:50 am-5:29 pm

Nonstop3h 39m

$217

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

週二 10/21

8:30 am-11:04 am

Nonstop4h 34m

Denver Intl

週六 10/25

7:10 am-12:59 pm

Nonstop3h 49m

$217

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

週四 11/13

8:55 pm-11:35 pm

Nonstop4h 40m

Denver Intl

週二 11/18

11:59 pm-6:00 am

Nonstop4h 01m

$217

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

週五 11/14

8:25 am-11:06 am

Nonstop4h 41m

Denver Intl

週二 11/18

11:59 pm-6:00 am

Nonstop4h 01m

$217

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

週四 11/13

8:25 am-11:06 am

Nonstop4h 41m

Denver Intl

週日 11/16

11:59 pm-6:00 am

Nonstop4h 01m

$217

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

週六 10/25

8:30 am-11:04 am

Nonstop4h 34m

Denver Intl

週六 11/1

7:10 am-1:00 pm

Nonstop3h 50m

$217

New YorkDenver

JFK - DEN

JFKDEN

New York John F Kennedy Intl

週一 11/3

7:00 pm-9:41 pm

Nonstop4h 41m

Denver Intl

週四 11/6

11:59 pm-6:00 am

Nonstop4h 01m

$217

New YorkDenver

LGA - DEN

LGADEN

New York LaGuardia

週二 11/4

7:30 am-9:52 am

Nonstop4h 22m

Denver Intl

週五 11/7

5:50 pm-11:36 pm

Nonstop3h 46m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 60 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 6 hours 27 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 at noon, 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 (52 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (29 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 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

4,242 reviews

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

4,242 reviews

Southwest

8.0

Very good

4,242 reviews

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

8.0

Very good

7,957 reviews

Southwest

8.0

Very good

4,242 reviews

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

8,924 reviews

Southwest

8.0

Very good

4,242 reviews

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

2,914 reviews

Southwest

8.0

Very good

4,242 reviews

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

3,174 reviews

Southwest

8.0

Very good

4,242 reviews

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 $1,052, however they can be found for as little as $62.
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

Browse thousands of different options on Cheapflights for your next trip

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$88+ 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 11/6. 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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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 9月 16, 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 9月 16, 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 9月 16, 2025.

Cheapflights Fare Finder

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 September 12, 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 December 16, 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 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.

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.

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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 9月 16, 2025.