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HK$3,567+ 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 9-9. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
17 Aug — 24 Aug1
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 18 July 2026.

Wed 9-922:30
HKG
-
DEN
1 stop24h 10m
United Airlines
Wed 20-111:21
DEN
-
HKG
2 stops28h 24m
United Airlines
Deal found 16-7HK$4,187
Tue 15-911:45
HKG
-
DEN
1 stop24h 23m
United Airlines
Sat 19-911:45
DEN
-
HKG
2 stops27h 15m
United Airlines
Deal found 15-7HK$4,775
Tue 8-911:45
HKG
-
DEN
1 stop18h 09m
United Airlines
Sat 12-913:30
DEN
-
HKG
2 stops25h 30m
United Airlines
Deal found 13-7HK$5,174
Mon 5-1000:45
HKG
-
DEN
2 stops32h 46m
Delta
Tue 3-1107:15
DEN
-
HKG
2 stops33h 25m
Delta
Deal found 16-7HK$5,700
Mon 14-900:45
HKG
-
DEN
2 stops30h 55m
Korean Air
Sat 19-906:00
DEN
-
HKG
2 stops26h 45m
Korean Air
Deal found 16-7HK$5,778
Tue 25-811:45
HKG
-
DEN
1 stop18h 52m
United Airlines
Fri 25-911:45
DEN
-
HKG
2 stops27h 15m
United Airlines
Deal found 13-7HK$6,703
Tue 15-911:20
HKG
-
DEN
2 stops25h 59m
星宇航空
Sat 19-919:08
DEN
-
HKG
2 stops24h 47m
星宇航空
Deal found 15-7HK$7,448
Sat 22-822:30
HKG
-
DEN
1 stop24h 10m
United Airlines
Sat 12-908:00
DEN
-
HKG
2 stops20h 55m
United Airlines
Deal found 15-7HK$7,574
Sat 22-807:30
HKG
-
DEN
2 stops31h 14m
Multiple Airlines
Sat 12-922:29
DEN
-
HKG
2 stops35h 16m
Multiple Airlines
Deal found 15-7HK$7,926
Tue 8-911:20
HKG
-
DEN
2 stops25h 59m
星宇航空
Sat 12-919:08
DEN
-
HKG
2 stops24h 47m
星宇航空
Deal found 14-7HK$8,240

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 18 July 2026.

Return from

HK$4,187

One-way from

HK$3,567

Popular in

June

Cheapest in

April

Average price

HK$9,831
United Airlines
  • United Airlines
  • 9-9-20-1
  • 3 total stops
  • 52h 34m total
  • Hong Kong to Denver
Search Deals
United Airlines
  • United Airlines
  • 9-9
  • 2 total stops
  • 22h 00m total
  • Hong Kong to Boulder
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (HK$2,105 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease (HK$704 potential savings vs. average return price).
Search Deals
Average for return flights in July 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 18 July 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
Fastest return journey

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 6-10

11:45-22:15

1 stop24h 30m

Denver Intl

Tue 3-11

17:50-07:00

1 stop22h 10m

HK$4,978

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 15-9

11:45-22:08

1 stop24h 23m

Denver Intl

Sat 19-9

11:45-05:00

2 stops27h 15m

HK$4,978

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 8-9

22:30-08:40

1 stop24h 10m

Denver Intl

Sat 12-9

15:57-05:40

1 stop23h 43m

HK$5,174
Cheapest one-way

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 9-9

11:45-19:45

2 stops22h 00m

HK$3,567

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 12-11

12:35-09:44

2 stops36h 09m

HK$3,606

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sat 7-11

18:10-17:00

2 stops37h 50m

HK$3,606

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 5-11

10:55-18:10

1 stop22h 15m

HK$3,622

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sat 7-11

10:35-19:36

2 stops24h 01m

HK$3,763

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sat 8-8

09:45-08:30

2 stops36h 45m

HK$5,535

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sun 2-8

22:55-09:46

3 stops48h 51m

HK$6,735

Flights are sorted by cheapest return flights first.

Deals found on 16-7

Showing 1-10 of 14 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 25 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$4,883

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 18 July 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
10,006 reviews
Check prices

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Entertainment

7.1

Boarding

7.7

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
10,006 reviews
United Airlines
7.4
Good
10,006 reviews
Check prices

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Entertainment

7.1

Boarding

7.7

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$1,544, however they can be found for as little as HK$412.

  • 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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