Find flights
Airlines

HK$4,404+ 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 22-8. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
23 Jun — 30 Jun1
1 adult

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 18 June 2025.

Return from

HK$8,336

One-way from

HK$4,404

Popular in

August

Cheapest in

February

Average price

HK$8,846
United Airlines
  • United Airlines
  • 15-8-20-8
  • 2 total stops
  • 49h 24m total
  • Hong Kong to Denver
Search Deals
22-8
  • 22-8
  • 2 total stops
  • 35h 14m total
  • Hong Kong to Boulder
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (HK$14,631 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (HK$4,600 potential savings vs. average return price).
Search Deals
Average for return flights in June 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 18 June 2025.

Fri 15-811:15HKG - DEN
1 stop25h 24mUnited Airlines
Wed 20-815:40DEN - HKG
1 stop24h 00mUnited Airlines
Deal found 16-6HK$8,336
Fri 15-820:10HKG - DEN
3 stops34h 51mMultiple Airlines
Wed 20-811:35DEN - HKG
1 stop38h 30mMultiple Airlines
Deal found 16-6HK$10,715
Thu 14-800:30HKG - DEN
2 stops36h 17mAsiana Airlines
Wed 20-819:52DEN - HKG
2 stops36h 58mAsiana Airlines
Deal found 16-6HK$10,966
Thu 14-800:25HKG - DEN
3 stops52h 17mEthiopian Air
Wed 20-813:52DEN - HKG
4 stops36h 53mEthiopian Air
Deal found 16-6HK$20,079

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 18 June 2025.
Use the filters below to find and compare flights to Boulder that are best for you.

Fly from

Hong Kong

Route

Departure

Return

Price

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Fri 15-8

11:15-22:39

1 stop25h 24m

Denver Intl

Wed 20-8

15:40-05:40

1 stop24h 00m

HK$8,336

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Fri 15-8

20:10-17:01

3 stops34h 51m

Denver Intl

Wed 20-8

11:35-16:05

1 stop38h 30m

HK$10,715

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 14-8

00:30-22:47

2 stops36h 17m

Denver Intl

Wed 20-8

19:52-22:50

2 stops36h 58m

HK$10,966

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 14-8

00:25-14:42

3 stops52h 17m

Denver Intl

Wed 20-8

13:52-16:45

4 stops36h 53m

HK$20,079

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Fri 22-8

13:00-10:14

2 stops35h 14m

HK$4,404

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 11-8

18:00-18:01

2 stops38h 01m

HK$5,958

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 7-7

19:40-21:24

2 stops39h 44m

HK$6,240

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 7-7

18:25-23:09

1 stop18h 44m

HK$7,818

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sun 10-8

00:45-23:07

2 stops36h 22m

HK$8,901

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sun 24-8

23:15-16:20

1 stop31h 05m

HK$8,996

Flights are sorted by cheapest return flights first.

Deals found on 16-6

Showing 1-10 of 13 results
1
2

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 25 hours 24 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
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

Plan your trip to Boulder by taking into account the average rainfall totals 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

Plan your trip to Boulder by taking into account the average temperature totals 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

Get insights into the airlines that provide service to Boulder. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boulder. Reviews last updated 18 June 2025.
Japan Airlines
8.3
Very Good
1,494 reviews
Check prices

Food

7.7

Boarding

8.4

Crew

8.7

Entertainment

7.8

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Japan Airlines
8.3
Very Good
1,494 reviews
Japan Airlines
8.3
Very Good
1,494 reviews
Check prices

Food

7.7

Boarding

8.4

Crew

8.7

Entertainment

7.8

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Asiana Airlines
8.2
Very Good
441 reviews
Japan Airlines
8.3
Very Good
1,494 reviews
Check prices

Food

7.7

Boarding

8.4

Crew

8.7

Entertainment

7.8

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Emirates
8.1
Very Good
3,273 reviews
Japan Airlines
8.3
Very Good
1,494 reviews
Check prices

Food

7.7

Boarding

8.4

Crew

8.7

Entertainment

7.8

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Delta
8.0
Very Good
7,964 reviews
Japan Airlines
8.3
Very Good
1,494 reviews
Check prices

Food

7.7

Boarding

8.4

Crew

8.7

Entertainment

7.8

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Cathay Pacific
7.5
Good
894 reviews
Japan Airlines
8.3
Very Good
1,494 reviews
Check prices

Food

7.7

Boarding

8.4

Crew

8.7

Entertainment

7.8

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.

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

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.
First Class
Business Class
Prem Econ Class
Economy 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?

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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

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.
Site
©2025 Cheapflights