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HK$4,233+ 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 28-5. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
18 Jan — 25 Jan1
1 adult
1 adult, Economy, 0 bags

Flights to Boulder in 2025

Enter your travel dates to find the best prices.

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 19 December 2025.

Sun 21-1222:30HKG - DEN
1 stop16h 56mUnited Airlines
Tue 30-1215:55DEN - HKG
1 stop36h 20mUnited Airlines
Deal found 18-12HK$8,551
Sun 21-1220:25HKG - DEN
2 stops59h 15mAir Canada
Tue 30-1211:20DEN - HKG
2 stops64h 20mAir Canada
Deal found 18-12HK$11,134
Sun 21-1221:00HKG - DEN
3 stops37h 46mEmirates
Tue 30-1213:25DEN - HKG
2 stops41h 25mEmirates
Deal found 18-12HK$26,174

Find flight deals to Boulder

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 19 December 2025.

Return from

HK$4,855

One-way from

HK$3,455

Popular in

May

Cheapest in

November

Average price

HK$8,442
United Airlines
  • United Airlines
  • 1-2-8-2
  • 3 total stops
  • 47h 41m total
  • Hong Kong to Denver
Search Deals
1-3
  • 1-3
  • 2 total stops
  • 27h 34m total
  • Hong Kong to Boulder
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (HK$852 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (HK$359 potential savings vs. average return price).
Search Deals
Average for return flights in December 2025
Search Deals

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 19 December 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

Thu 22-1

10:35-14:54

1 stop19h 19m

Denver Intl

Mon 26-1

11:22-06:45

2 stops28h 23m

HK$5,151

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 18-5

11:45-15:43

1 stop17h 58m

Denver Intl

Tue 26-5

06:00-18:30

1 stop22h 30m

HK$5,151

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 21-1

10:35-12:23

1 stop16h 48m

Denver Intl

Sun 25-1

19:40-19:15

1 stop32h 35m

HK$5,151

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 10-2

22:30-00:59

1 stop17h 29m

Denver Intl

Fri 20-2

13:45-06:45

2 stops26h 00m

HK$5,454

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 9-2

20:25-12:37

1 stop31h 12m

Denver Intl

Wed 18-2

17:30-18:40

2 stops34h 10m

HK$6,022

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Fri 13-2

20:25-12:37

1 stop31h 12m

Denver Intl

Sun 22-2

17:30-18:40

2 stops34h 10m

HK$6,022

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sat 7-2

17:35-09:35

2 stops31h 00m

Denver Intl

Sat 30-5

20:10-09:15

2 stops23h 05m

HK$6,777

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 18-5

20:10-12:00

2 stops29h 50m

Denver Intl

Tue 26-5

20:35-10:05

2 stops23h 30m

HK$6,932

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 21-1

11:15-23:35

2 stops27h 20m

Denver Intl

Sun 25-1

13:34-10:10

2 stops29h 36m

HK$8,255

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 28-5

18:15-16:49

2 stops36h 34m

HK$4,233

Flights are sorted by cheapest return flights first.

Deals found on 19-12

Showing 1-10 of 17 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 16 hours 48 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$4,849

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 19 December 2025.
Check out reviews from past customers who have flown United 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.
United Airlines
7.4
Good
9,097 reviews
Check prices

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability
United Airlines
7.4
Good
9,097 reviews
United Airlines
7.4
Good
9,097 reviews
Check prices

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability

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$8,721, however they can be found for as little as HK$606.

  • 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

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