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HK$4,850+ Cheap flights to Boulder

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20-11. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
4 Dec — 11 Dec1
1 adult
1 adult, Economy, 0 bags

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 4 November 2025.

Return from

HK$4,850

Popular in

November

Cheapest in

February

Average price

HK$12,358
United Airlines
  • United Airlines
  • 20-11-23-11
  • 2 total stops
  • 58h 37m total
  • Hong Kong to Denver
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (HK$1,362 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (HK$401 potential savings vs. average return price).
Search Deals
Average for return flights in November 2025
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Find flight deals to Boulder

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 4 November 2025.

Thu 20-1110:35HKG - DEN
1 stop16h 34mUnited Airlines
Sun 23-1119:21DEN - HKG
2 stops32h 59mUnited Airlines
Deal found 2-11HK$4,850
Thu 20-1119:40HKG - DEN
2 stops19h 19mMultiple Airlines
Sun 23-1107:45DEN - HKG
2 stops22h 05mMultiple Airlines
Deal found 2-11HK$7,275
Wed 19-1100:25HKG - DEN
2 stops27h 12mMultiple Airlines
Mon 24-1119:05DEN - HKG
1 stop32h 35mMultiple Airlines
Deal found 2-11HK$7,772
Thu 18-1210:35HKG - DEN
1 stop26h 25mUnited Airlines
Thu 25-1207:50DEN - HKG
1 stop20h 25mUnited Airlines
Deal found 3-11HK$8,612
Thu 18-1220:25HKG - DEN
2 stops27h 30mAir Canada
Thu 25-1219:05DEN - HKG
1 stop32h 35mAir Canada
Deal found 3-11HK$10,337

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 November 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 20-11

10:35-12:09

1 stop16h 34m

Denver Intl

Sun 23-11

19:21-19:20

2 stops32h 59m

HK$4,850

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 20-11

10:35-12:09

1 stop16h 34m

Denver Intl

Mon 24-11

21:10-19:20

2 stops31h 10m

HK$4,850

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 2-3

22:30-10:27

1 stop26h 57m

Denver Intl

Thu 5-3

07:45-19:15

1 stop20h 30m

HK$4,850

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 20-11

19:40-23:59

2 stops19h 19m

Denver Intl

Mon 24-11

07:45-20:50

2 stops22h 05m

HK$7,275

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 20-11

19:40-23:59

2 stops19h 19m

Denver Intl

Sun 23-11

07:45-20:50

2 stops22h 05m

HK$7,275

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 2-3

11:15-22:39

2 stops26h 24m

Denver Intl

Thu 5-3

17:15-10:10

2 stops25h 55m

HK$8,075

Flights are sorted by cheapest return flights first.

Deals found on 2-11

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 34 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$6,459

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 November 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
9,002 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Overall

7.4

Crew

8.1

Boarding

7.7

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
9,002 reviews
United Airlines
7.4
Good
9,002 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Overall

7.4

Crew

8.1

Boarding

7.7

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$1,274, however they can be found for as little as HK$1,274.

  • 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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