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HK$3,178+ 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 22-10. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
11 Oct — 18 Oct1
1 adult
1 adult, Economy

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 11 September 2025.

Return from

HK$5,429

One-way from

HK$3,178

Popular in

May

Cheapest in

February

Average price

HK$6,893
United Airlines
  • United Airlines
  • 2-3-5-3
  • 3 total stops
  • 48h 51m total
  • Hong Kong to Denver
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22-10
  • 22-10
  • 2 total stops
  • 36h 35m total
  • Hong Kong to Boulder
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (HK$2,670 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (HK$1,871 potential savings vs. average return price).
Search Deals
Average for return flights in September 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 11 September 2025.

Sun 26-1022:30HKG - DEN
1 stop24h 08mUnited Airlines
Sun 2-1110:12DEN - HKG
2 stops29h 33mUnited Airlines
Deal found 10-9HK$5,429
Sun 26-1011:15HKG - DEN
2 stops26h 44mMultiple Airlines
Sun 2-1107:00DEN - HKG
2 stops36h 10mMultiple Airlines
Deal found 10-9HK$7,150
Mon 1-1209:45HKG - DEN
2 stops22h 59mMultiple Airlines
Mon 5-108:45DEN - HKG
1 stop18h 55mMultiple Airlines
Deal found 8-9HK$7,548
Mon 1-1220:25HKG - DEN
1 stop31h 12mAir Canada
Mon 5-108:45DEN - HKG
1 stop18h 55mAir Canada
Deal found 8-9HK$7,875
Sat 25-1000:45HKG - DEN
2 stops32h 11mDelta
Sun 2-1119:41DEN - HKG
2 stops36h 29mDelta
Deal found 10-9HK$9,986
Sun 30-1100:25HKG - DEN
2 stops37h 02mQatar Airways
Mon 5-123:59DEN - HKG
2 stops30h 41mQatar Airways
Deal found 8-9HK$10,959
Sun 30-1100:15HKG - DEN
1 stop30h 45mLufthansa
Mon 5-117:45DEN - HKG
1 stop31h 40mLufthansa
Deal found 8-9HK$12,751
Mon 1-1218:05HKG - DEN
2 stops40h 59mEmirates
Mon 5-111:22DEN - HKG
3 stops39h 18mEmirates
Deal found 8-9HK$21,848

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 11 September 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

Mon 2-3

10:35-18:10

1 stop22h 35m

Denver Intl

Thu 5-3

13:29-06:45

2 stops26h 16m

HK$5,429

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sun 26-10

22:30-12:09

1 stop27h 39m

Denver Intl

Sun 2-11

16:05-07:00

1 stop23h 55m

HK$5,429

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sun 26-10

11:15-23:59

2 stops26h 44m

Denver Intl

Sun 2-11

07:00-10:10

2 stops36h 10m

HK$7,150

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sat 31-1

20:05-11:39

2 stops30h 34m

Denver Intl

Sun 1-3

19:05-18:40

1 stop32h 35m

HK$7,446

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 1-12

09:45-17:44

2 stops22h 59m

Denver Intl

Mon 5-1

08:45-18:40

1 stop18h 55m

HK$7,548

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 22-10

18:20-16:55

2 stops36h 35m

HK$3,178

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sun 26-10

13:40-18:22

2 stops42h 42m

HK$3,178

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 27-10

12:45-10:18

2 stops35h 33m

HK$3,404

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Fri 24-10

13:40-21:46

2 stops46h 06m

HK$3,427

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Fri 5-12

18:55-10:03

2 stops30h 08m

HK$3,544

Flights are sorted by cheapest return flights first.

Deals found on 9-9

Showing 1-10 of 12 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 21 hours 59 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 11 September 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
8,937 reviews
Check prices

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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

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