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HK$3,593+ 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 24-2. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
11 Feb — 18 Feb1
1 adult
1 adult, Economy, 0 bags

Flights to Boulder in 2026

Find the latest flights to Boulder in 2026, 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 12 January 2026.

Return from

HK$5,627

One-way from

HK$3,593

Popular in

December

Cheapest in

November

Average price

HK$8,613
United Airlines
  • United Airlines
  • 22-1-12-2
  • 2 total stops
  • 47h 17m total
  • Hong Kong to Denver
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24-2
  • 24-2
  • 2 total stops
  • 30h 21m total
  • Hong Kong to Boulder
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (HK$108 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (HK$184 potential savings vs. average return price).
Search Deals
Average for return flights in January 2026
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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 12 January 2026.

Thu 22-110:35HKG - DEN
1 stop21h 02mUnited Airlines
Thu 12-213:45DEN - HKG
1 stop26h 15mUnited Airlines
Deal found 10-1HK$5,627
Sat 28-222:30HKG - DEN
1 stop17h 28mUnited Airlines
Wed 4-307:49DEN - HKG
1 stop20h 26mUnited Airlines
Deal found 11-1HK$5,744
Thu 29-122:30HKG - DEN
1 stop17h 29mUnited Airlines
Fri 20-207:49DEN - HKG
1 stop20h 26mUnited Airlines
Deal found 11-1HK$5,815
Sun 8-210:35HKG - DEN
1 stop29h 24mUnited Airlines
Fri 27-219:35DEN - HKG
1 stop20h 25mUnited Airlines
Deal found 11-1HK$5,924
Sun 8-220:25HKG - DEN
2 stops27h 29mAir Canada
Fri 27-208:05DEN - HKG
1 stop19h 35mAir Canada
Deal found 11-1HK$6,649
Sun 1-320:25HKG - DEN
1 stop35h 08mAir Canada
Mon 11-519:50DEN - HKG
1 stop19h 20mAir Canada
Deal found 10-1HK$6,960
Sun 1-320:25HKG - DEN
1 stop35h 08mAir Canada
Fri 15-506:00DEN - HKG
2 stops33h 10mAir Canada
Deal found 10-1HK$6,999
Wed 4-320:05HKG - DEN
2 stops28h 35mMultiple Airlines
Wed 13-520:35DEN - HKG
2 stops22h 40mMultiple Airlines
Deal found 10-1HK$7,179

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 12 January 2026.
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

10:35-16:37

1 stop21h 02m

Denver Intl

Thu 12-2

13:45-07:00

1 stop26h 15m

HK$5,627

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sun 8-2

22:30-00:59

1 stop17h 29m

Denver Intl

Thu 26-2

13:45-06:45

2 stops26h 00m

HK$5,744

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sat 28-2

10:35-20:04

1 stop24h 29m

Denver Intl

Wed 4-3

13:45-06:45

2 stops26h 00m

HK$5,744

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 29-1

22:30-00:59

1 stop17h 29m

Denver Intl

Fri 20-2

07:49-19:15

1 stop20h 26m

HK$5,815

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sun 8-2

10:35-12:23

1 stop16h 48m

Denver Intl

Fri 27-2

11:22-07:00

1 stop28h 38m

HK$5,924

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 20-1

14:55-17:49

3 stops41h 54m

HK$3,679

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 24-2

20:05-10:56

2 stops29h 51m

HK$3,718

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 23-2

23:55-18:00

2 stops33h 05m

HK$3,741

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sat 28-2

19:45-09:49

2 stops29h 04m

HK$3,788

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 20-1

20:25-18:07

2 stops36h 42m

HK$3,936

Flights are sorted by cheapest return flights first.

Deals found on 10-1

Showing 1-10 of 15 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 17 hours 29 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$4,858

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 12 January 2026.
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
9,143 reviews
Check prices

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,143 reviews
United Airlines
7.4
Good
9,143 reviews
Check prices

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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$607, however they can be found for as little as HK$607.

  • 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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