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HK$3,386+ 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 14-1. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
3 Jan — 10 Jan1
1 adult
1 adult, Economy, 0 bags

Flights to Boulder in 2025

Enter your travel dates to find the best prices.

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 4 December 2025.

Sun 18-122:30HKG - DEN
1 stop25h 09mUnited Airlines
Sun 25-111:23DEN - HKG
2 stops28h 22mUnited Airlines
Deal found 4-12HK$4,849
Thu 22-110:35HKG - DEN
1 stop21h 02mUnited Airlines
Mon 26-119:34DEN - HKG
2 stops32h 46mUnited Airlines
Deal found 3-12HK$4,849
Wed 4-310:35HKG - DEN
1 stop37h 07mUnited Airlines
Wed 11-311:20DEN - HKG
2 stops28h 25mUnited Airlines
Deal found 3-12HK$4,849
Wed 4-210:35HKG - DEN
1 stop21h 02mUnited Airlines
Sun 8-219:34DEN - HKG
2 stops32h 46mUnited Airlines
Deal found 1-12HK$4,849
Sat 17-110:35HKG - DEN
1 stop29h 25mUnited Airlines
Sat 24-111:23DEN - HKG
2 stops28h 22mUnited Airlines
Deal found 3-12HK$4,849
Wed 1-411:45HKG - DEN
1 stop16h 47mUnited Airlines
Thu 30-406:00DEN - HKG
1 stop22h 30mUnited Airlines
Deal found 2-12HK$5,215

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 4 December 2025.

Return from

HK$4,849

One-way from

HK$3,386

Popular in

May

Cheapest in

November

Average price

HK$9,029
United Airlines
  • United Airlines
  • 4-2-8-2
  • 3 total stops
  • 53h 48m total
  • Hong Kong to Denver
Search Deals
14-1
  • 14-1
  • 2 total stops
  • 23h 43m total
  • Hong Kong to Boulder
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (HK$767 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (HK$349 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 4 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

Sun 18-1

22:30-08:39

1 stop25h 09m

Denver Intl

Sun 25-1

11:23-06:45

2 stops28h 22m

HK$4,849

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 22-1

10:35-16:37

1 stop21h 02m

Denver Intl

Mon 26-1

19:34-19:20

2 stops32h 46m

HK$4,849

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 4-3

10:35-08:42

1 stop37h 07m

Denver Intl

Wed 11-3

11:20-05:45

2 stops28h 25m

HK$4,849

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 4-2

10:35-16:37

1 stop21h 02m

Denver Intl

Sun 8-2

19:34-19:20

2 stops32h 46m

HK$4,849

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sat 17-1

10:35-01:00

1 stop29h 25m

Denver Intl

Sat 24-1

11:23-06:45

2 stops28h 22m

HK$4,849

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 1-4

11:45-14:32

1 stop16h 47m

Denver Intl

Thu 30-4

06:00-18:30

1 stop22h 30m

HK$5,215

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 14-1

10:20-19:03

2 stops23h 43m

HK$3,386

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Fri 16-1

11:50-10:40

3 stops37h 50m

HK$3,830

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 15-1

10:50-00:05

3 stops52h 15m

HK$3,876

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sat 17-1

19:40-10:02

2 stops29h 22m

HK$4,040

Flights are sorted by cheapest return flights first.

Deals found on 2-12

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 16 hours 47 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$6,175

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 4 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
9,066 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,066 reviews
United Airlines
7.4
Good
9,066 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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$8,772, 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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