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

Yes, flights with stopovers 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, United Airlines is rated the highest out of the airlines that fly to Boulder.

How much is a return flight to Boulder?

A return flight to Boulder will typically cost around HK$1,141, however they can be found for as little as HK$108.

Does Denver Intl have rental cars?

Yes. Those touching down at Denver Intl can take advantage of the car hire 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 km away from Denver Intl).

HK$3,713+ Flights to Boulder

Flights to Boulder in 2025

Return from	HK$5,966
One-way from	HK$3,713
Popular in	August
Cheapest in	February
Average price	HK$8,360

United Airlines
2-9-5-9
2 total stops
47h 32m total
Hong Kong to Denver

Search Deals

26-8
2 total stops
57h 06m total
Hong Kong to Boulder

Search Deals

Highest demand for flights based on searches. 17% potential increase in price (HK$14,536 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 7% potential price decrease (HK$4,602 potential savings vs. average return price).

Search Deals

Average for return flights in July 2025

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 13 July 2025.

Tue 2-911:15HKG - DEN

1 stop19h 20mUnited Airlines

Fri 5-911:28DEN - HKG

1 stop28h 12mUnited Airlines

Deal found 11-7HK$5,966

Tue 2-919:40HKG - DEN

2 stops32h 26mEVA Air

Wed 24-921:23DEN - HKG

2 stops24h 42mEVA Air

Deal found 11-7HK$6,939

Tue 2-919:40HKG - DEN

2 stops30h 30mMultiple Airlines

Fri 5-921:23DEN - HKG

2 stops24h 42mMultiple Airlines

Deal found 11-7HK$7,316

Mon 1-918:00HKG - DEN

2 stops38h 03mAir Canada

Sun 21-919:49DEN - HKG

1 stop30h 16mAir Canada

Deal found 11-7HK$8,022

Wed 3-913:00HKG - DEN

2 stops23h 18mAsiana Airlines

Tue 23-919:20DEN - HKG

2 stops26h 20mAsiana Airlines

Deal found 11-7HK$8,391

Mon 1-922:30HKG - DEN

1 stop33h 25mTurkish Airlines

Fri 26-919:50DEN - HKG

1 stop31h 25mTurkish Airlines

Deal found 11-7HK$10,840

Thu 4-923:15HKG - DEN

1 stop31h 05mSWISS

Sat 27-917:35DEN - HKG

2 stops57h 05mSWISS

Deal found 11-7HK$10,997

Mon 1-921:30HKG - DEN

3 stops38h 30mEmirates

Fri 5-914:45DEN - HKG

2 stops34h 40mEmirates

Deal found 11-7HK$14,624

Fri 29-800:45HKG - DEN

2 stops30h 36mKorean Air

Fri 5-906:50DEN - HKG

2 stops37h 50mKorean Air

Deal found 11-7HK$14,757

Tue 2-923:25HKG - DEN

1 stop30h 10mLufthansa

Fri 26-917:59DEN - HKG

1 stop31h 46mLufthansa

Deal found 11-7HK$15,597

Best flights to Boulder
Discover carefully curated flight deals to Boulder that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 July 2025.

Tue 2-911:15HKG - DEN

1 stop19h 20mUnited Airlines

Fri 5-911:28DEN - HKG

1 stop28h 12mUnited Airlines

Deal found 11-7HK$5,966

Tue 2-919:40HKG - DEN

2 stops32h 26mEVA Air

Wed 24-921:23DEN - HKG

2 stops24h 42mEVA Air

Deal found 11-7HK$6,939

Tue 2-919:40HKG - DEN

2 stops30h 30mMultiple Airlines

Fri 5-921:23DEN - HKG

2 stops24h 42mMultiple Airlines

Deal found 11-7HK$7,316

Mon 1-918:00HKG - DEN

2 stops38h 03mAir Canada

Sun 21-919:49DEN - HKG

1 stop30h 16mAir Canada

Deal found 11-7HK$8,022

Wed 3-913:00HKG - DEN

2 stops23h 18mAsiana Airlines

Tue 23-919:20DEN - HKG

2 stops26h 20mAsiana Airlines

Deal found 11-7HK$8,391

Mon 1-922:30HKG - DEN

1 stop33h 25mTurkish Airlines

Fri 26-919:50DEN - HKG

1 stop31h 25mTurkish Airlines

Deal found 11-7HK$10,840

Thu 4-923:15HKG - DEN

1 stop31h 05mSWISS

Sat 27-917:35DEN - HKG

2 stops57h 05mSWISS

Deal found 11-7HK$10,997

Mon 1-921:30HKG - DEN

3 stops38h 30mEmirates

Fri 5-914:45DEN - HKG

2 stops34h 40mEmirates

Deal found 11-7HK$14,624

Fri 29-800:45HKG - DEN

2 stops30h 36mKorean Air

Fri 5-906:50DEN - HKG

2 stops37h 50mKorean Air

Deal found 11-7HK$14,757

Tue 2-923:25HKG - DEN

1 stop30h 10mLufthansa

Fri 26-917:59DEN - HKG

1 stop31h 46mLufthansa

Deal found 11-7HK$15,597

Last-minute flights to Boulder
Discover last-minute flight deals to Boulder. Data last updated 13 July 2025 and is based on user searches.

Sat 19-719:00HKG - DEN

2 stops39h 36mEmirates

Thu 31-714:44DEN - HKG

2 stops34h 41mEmirates

Deal found 11-7HK$34,366

Sun 20-700:05HKG - DEN

1 stop30h 15mMultiple Airlines

Mon 28-717:59DEN - HKG

1 stop31h 46mMultiple Airlines

Deal found 11-7HK$43,322

Sun 20-723:00HKG - DEN

1 stop31h 25mBritish Airways

Thu 31-712:21DEN - HKG

2 stops37h 09mBritish Airways

Deal found 11-7HK$44,939

Mon 21-723:15HKG - DEN

2 stops36h 45mSWISS

Mon 28-717:59DEN - HKG

2 stops56h 41mSWISS

Deal found 11-7HK$20,660

Mon 21-711:15HKG - DEN

2 stops19h 10mUnited Airlines

Thu 31-710:13DEN - HKG

1 stop18h 42mUnited Airlines

Deal found 11-7HK$22,159

Mon 21-700:45HKG - DEN

2 stops33h 10mDelta

Tue 29-705:30DEN - HKG

2 stops39h 10mDelta

Deal found 11-7HK$22,670

Mon 21-723:25HKG - DEN

1 stop28h 00mLufthansa

Sun 27-717:59DEN - HKG

1 stop31h 46mLufthansa

Deal found 11-7HK$39,311

Mon 21-700:45HKG - DEN

2 stops33h 10mKorean Air

Thu 31-719:15DEN - HKG

2 stops25h 25mKorean Air

Deal found 11-7HK$44,625

Tue 22-710:25HKG - DEN

2 stops26h 44mJapan Airlines

Tue 29-706:00DEN - HKG

2 stops26h 00mJapan Airlines

Deal found 11-7HK$19,891

Tue 22-718:00HKG - DEN

2 stops28h 44mAir Canada

Tue 29-707:50DEN - HKG

1 stop18h 15mAir Canada

Deal found 11-7HK$21,163

Tue 22-722:30HKG - DEN

1 stop33h 25mTurkish Airlines

Tue 29-719:50DEN - HKG

1 stop31h 25mTurkish Airlines

Deal found 11-7HK$34,907

Tue 22-723:00HKG - DEN

2 stops38h 09mPhilippine Airlines

Tue 29-711:40DEN - HKG

2 stops39h 40mPhilippine Airlines

Deal found 11-7HK$35,606

Cheapflights Fare Finder

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

Fly from

Route

Departure

Return

Price

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 2-9

11:15-16:35

1 stop19h 20m

Denver Intl

Fri 5-9

11:28-05:40

1 stop28h 12m

HK$5,966

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 2-9

19:40-14:06

2 stops32h 26m

Denver Intl

Wed 24-9

21:23-12:05

2 stops24h 42m

HK$6,939

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 2-9

19:40-12:10

2 stops30h 30m

Denver Intl

Fri 5-9

21:23-12:05

2 stops24h 42m

HK$7,316

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 1-9

18:00-18:03

2 stops38h 03m

Denver Intl

Mon 22-9

19:49-16:05

1 stop30h 16m

HK$8,022

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 3-9

13:00-22:18

2 stops23h 18m

Denver Intl

Tue 23-9

19:20-11:40

2 stops26h 20m

HK$8,391

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 1-9

22:30-17:55

1 stop33h 25m

Denver Intl

Fri 26-9

19:50-17:15

1 stop31h 25m

HK$10,840

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 4-9

23:15-16:20

1 stop31h 05m

Denver Intl

Sat 27-9

17:35-16:40

2 stops57h 05m

HK$10,997

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 1-9

21:30-22:00

3 stops38h 30m

Denver Intl

Fri 5-9

14:45-15:25

2 stops34h 40m

HK$14,624

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Fri 29-8

00:45-17:21

2 stops30h 36m

Denver Intl

Fri 5-9

06:50-10:40

2 stops37h 50m

HK$14,757

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 2-9

23:25-15:35

1 stop30h 10m

Denver Intl

Fri 26-9

17:59-15:45

1 stop31h 46m

HK$15,597

Flights are sorted by cheapest return flights first.

Deals found on 12-7

Showing 1-10 of 12 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 return 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

How long is the flight to Boulder?

On average, a flight from Hong Kong to Boulder takes 17 hours 45 minutes. Flights to Boulder from other popular cities in Hong Kong will vary in length. Below are a few examples of popular routes and their flight times.

What are the most popular airlines that fly to Boulder?

The most popular airline flying from Hong Kong to Boulder is United Airlines.

United Airlines

From HK$831

What are the cheapest airlines that fly to Boulder?

The cheapest airline flying from Hong Kong to Boulder is United Airlines.

Rainfall in Boulder by month

In terms of precipitation, rainfall in Boulder ranges from 13.0 - 58.0 mm per month. May is typically the wettest month, when rainfall can reach 58.0 mm. January is typically the driest time to visit Boulder when rainfall is around 13.0 mm.

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 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

Reviews of airlines servicing Boulder

Check out reviews from past customers who have flown EVA Air, Korean Air, andAsiana Airlines to the United States to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

EVA Air

8.4

Very Good

1,215 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

EVA Air

8.4

Very Good

1,215 reviews

EVA Air

8.4

Very Good

1,215 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Korean Air

8.4

Very Good

1,107 reviews

EVA Air

8.4

Very Good

1,215 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Asiana Airlines

8.2

Very Good

454 reviews

EVA Air

8.4

Very Good

1,215 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Emirates

8.1

Very Good

3,284 reviews

EVA Air

8.4

Very Good

1,215 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

SWISS

7.5

Good

1,656 reviews

EVA Air

8.4

Very Good

1,215 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

FAQs about flying to Boulder

Can I find cheaper flights to Boulder if I am willing to have stopovers?
Yes, flights with stopovers 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, United Airlines is rated the highest out of the airlines that fly to Boulder.
How much is a return flight to Boulder?
A return flight to Boulder will typically cost around HK$1,141, however they can be found for as little as HK$108.
Does Denver Intl have rental cars?
Yes. Those touching down at Denver Intl can take advantage of the car hire 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 km away from Denver Intl).

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Search flights to Boulder by cabin class

Fly with Cheapflights

How does Cheapflights help users find flights to Boulder?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights to Boulder. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets to Boulder?

Cheapflights helps you find that perfect flight to Boulder by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights to Boulder with no change fees?

Yes, we can. To see specific flights to Boulder with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights to Boulder become cheaper?

Yes, Cheapflights has a feature called Price Alerts, which notifies users when flight prices change. Track prices for your flight to Boulder today and book when you’re ready!

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

HK$3,713+ 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 26-8. Fares are subject to change and may not be available on all flights or dates of travel.

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 70,647 searches and data was last updated on 13 July 2025.

Return from

One-way from

Popular in

Cheapest in

Average price

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 13 July 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 13 July 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 70,647 searches and data was last updated on 13 July 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

How long is the flight 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

Check out reviews from past customers who have flown EVA Air, Korean Air, andAsiana Airlines to the United States to help guide your decision. You can also see how each airline stacks up 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 stopovers?

What is the best airline to fly to Boulder?

How much is a return flight to Boulder?

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.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights to Boulder?

Why should you use Cheapflights to find cheap flight tickets to Boulder?

Can Cheapflights find flights to Boulder with no change fees?

Can Cheapflights notify me if prices for flights to Boulder become cheaper?

100% Free

Book with Flexibility

Travel Smart

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 13 July 2025.