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HK$3,175+ 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 12-5. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
8 Apr — 15 Apr1
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 9 March 2026.

Sat 2-511:45
HKG
-
DEN
1 stop20h 35m
United Airlines
Thu 7-507:40
DEN
-
HKG
2 stops31h 20m
United Airlines
Deal found 8-3HK$4,747
Wed 22-411:45
HKG
-
DEN
1 stop20h 40m
United Airlines
Sun 26-416:00
DEN
-
HKG
1 stop36h 30m
United Airlines
Deal found 8-3HK$4,856
Thu 30-411:45
HKG
-
DEN
1 stop17h 58m
United Airlines
Thu 7-506:00
DEN
-
HKG
1 stop22h 30m
United Airlines
Deal found 6-3HK$4,927
Tue 7-422:30
HKG
-
DEN
1 stop24h 10m
United Airlines
Sun 12-421:17
DEN
-
HKG
1 stop31h 13m
United Airlines
Deal found 7-3HK$5,028
Sat 19-911:45
HKG
-
DEN
1 stop22h 21m
United Airlines
Thu 24-915:45
DEN
-
HKG
1 stop23h 55m
United Airlines
Deal found 4-3HK$5,216
Fri 1-511:45
HKG
-
DEN
1 stop23h 03m
United Airlines
Fri 8-506:00
DEN
-
HKG
1 stop22h 30m
United Airlines
Deal found 4-3HK$5,599

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 9 March 2026.

Return from

HK$4,747

One-way from

HK$3,175

Popular in

January

Cheapest in

November

Average price

HK$7,797
United Airlines
  • United Airlines
  • 2-5-7-5
  • 3 total stops
  • 51h 55m total
  • Hong Kong to Denver
Search Deals
12-5
  • 12-5
  • 2 total stops
  • 42h 49m total
  • Hong Kong to Boulder
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (HK$761 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (HK$239 potential savings vs. average return price).
Search Deals
Average for return flights in March 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 9 March 2026.
Use the filters below to find and compare flights to Boulder that are best for you.

Fly from

Route

Departure

Return

Price

Cheapest return flight

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 21-4

11:45-18:25

1 stop20h 40m

Denver Intl

Thu 30-4

16:00-05:00

2 stops23h 00m

HK$4,747

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 22-4

11:45-18:25

1 stop20h 40m

Denver Intl

Sun 26-4

21:17-18:30

1 stop31h 13m

HK$4,856

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 20-4

22:30-08:40

1 stop24h 10m

Denver Intl

Mon 27-4

17:42-05:40

1 stop21h 58m

HK$4,864

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 30-4

11:45-15:43

1 stop17h 58m

Denver Intl

Thu 7-5

13:25-05:00

2 stops25h 35m

HK$4,966

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sat 2-5

11:45-22:57

1 stop25h 12m

Denver Intl

Mon 11-5

08:00-18:30

1 stop20h 30m

HK$5,200

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sat 2-5

11:45-18:20

1 stop20h 35m

Denver Intl

Thu 7-5

11:25-05:40

1 stop28h 15m

HK$5,200
Fastest return journey

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Fri 1-5

11:45-16:29

1 stop18h 44m

Denver Intl

Fri 8-5

06:00-18:55

2 stops22h 55m

HK$5,638
Cheapest one-way

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sun 21-6

09:25-17:13

2 stops21h 48m

HK$3,245

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 11-5

20:40-22:49

2 stops40h 09m

HK$3,355

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sun 21-6

09:45-10:33

2 stops38h 48m

HK$3,754

Flights are sorted by cheapest return flights first.

Deals found on 7-3

Showing 1-10 of 15 resultsSorted by cheapest first
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 20 hours 35 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$4,870

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 9 March 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
9,408 reviews
Check prices

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

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
9,408 reviews
United Airlines
7.4
Good
9,408 reviews
Check prices

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

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$1,541, 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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