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HK$3,353+ 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 15-4. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
14 Mar — 21 Mar1
1 adult
1 adult, Economy, 0 bags

Flights to Boulder in 2026

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 February 2026.

Mon 23-210:35
HKG
-
DEN
1 stop16h 43m
United Airlines
Mon 23-221:11
DEN
-
HKG
1 stop31h 04m
United Airlines
Deal found 10-2HK$5,159
Sun 22-210:35
HKG
-
DEN
1 stop16h 43m
United Airlines
Sun 22-221:11
DEN
-
HKG
1 stop31h 04m
United Airlines
Deal found 10-2HK$5,346
Sat 28-222:30
HKG
-
DEN
1 stop25h 17m
United Airlines
Wed 4-313:45
DEN
-
HKG
2 stops26h 00m
United Airlines
Deal found 8-2HK$5,354
Wed 18-319:25
HKG
-
DEN
2 stops59h 15m
Air Canada
Fri 17-719:50
DEN
-
HKG
1 stop19h 20m
Air Canada
Deal found 10-2HK$6,792
Sat 28-211:15
HKG
-
DEN
2 stops27h 44m
星宇航空
Wed 4-318:16
DEN
-
HKG
2 stops24h 54m
星宇航空
Deal found 10-2HK$9,036

Find flight deals to Boulder

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 February 2026.

Return from

HK$5,159

One-way from

HK$3,353

Popular in

January

Cheapest in

November

Average price

HK$5,987
United Airlines
  • United Airlines
  • 23-2-23-2
  • 2 total stops
  • 50h 21m total
  • Hong Kong to Denver
Search Deals
15-4
  • 15-4
  • 2 total stops
  • 58h 56m total
  • Hong Kong to Boulder
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (HK$615 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (HK$203 potential savings vs. average return price).
Search Deals
Average for return flights in February 2026
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 12 February 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

Mon 23-2

10:35-14:52

1 stop19h 17m

Denver Intl

Mon 23-2

21:11-19:15

1 stop31h 04m

HK$5,159

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 18-3

10:35-16:40

1 stop20h 05m

Denver Intl

Sun 22-3

20:00-19:15

1 stop33h 15m

HK$5,159

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sun 22-2

10:35-12:18

1 stop16h 43m

Denver Intl

Sun 22-2

21:11-19:15

1 stop31h 04m

HK$5,346

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sat 28-2

10:35-16:34

1 stop20h 59m

Denver Intl

Wed 4-3

07:49-19:15

1 stop20h 26m

HK$5,346

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 18-3

19:25-16:40

2 stops59h 15m

Denver Intl

Fri 17-7

19:50-05:10

1 stop19h 20m

HK$6,792

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 23-2

17:35-23:59

2 stops21h 24m

HK$3,470

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 1-4

13:30-00:42

2 stops25h 12m

HK$3,627

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 13-4

09:45-08:26

2 stops36h 41m

HK$3,689

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 31-3

21:45-00:42

2 stops40h 57m

HK$3,689

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 10-3

15:30-03:56

3 stops26h 26m

HK$3,705

Flights are sorted by cheapest return flights first.

Deals found on 10-2

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 16 hours 43 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$4,868

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 February 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
9,283 reviews
Check prices

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,283 reviews
United Airlines
7.4
Good
9,283 reviews
Check prices

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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$1,540, however they can be found for as little as HK$411.

  • 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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