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HK$3,658+ 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 30-5. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
7 Jun — 14 Jun1
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 8 May 2026.

Wed 24-611:45
HKG
-
DEN
1 stop34h 50m
United Airlines
Sun 28-605:32
DEN
-
HKG
1 stop22h 58m
United Airlines
Deal found 4-5HK$5,576
Tue 23-622:30
HKG
-
DEN
1 stop24h 05m
Multiple Airlines
Thu 15-1010:05
DEN
-
HKG
1 stop18h 25m
Multiple Airlines
Deal found 3-5HK$6,023
Tue 9-609:45
HKG
-
DEN
2 stops38h 48m
Air Canada
Tue 23-619:18
DEN
-
HKG
2 stops43h 57m
Air Canada
Deal found 7-5HK$6,759
Thu 19-1110:35
HKG
-
DEN
1 stop18h 57m
United Airlines
Tue 24-1107:58
DEN
-
HKG
1 stop20h 17m
United Airlines
Deal found 6-5HK$7,190
Thu 16-711:45
HKG
-
DEN
1 stop27h 02m
United Airlines
Thu 30-718:05
DEN
-
HKG
1 stop21h 35m
United Airlines
Deal found 8-5HK$7,198
Tue 15-912:40
HKG
-
DEN
1 stop43h 19m
United Airlines
Mon 21-909:35
DEN
-
HKG
1 stop19h 20m
United Airlines
Deal found 5-5HK$7,362
Thu 27-822:30
HKG
-
DEN
1 stop25h 33m
United Airlines
Mon 31-817:50
DEN
-
HKG
2 stops21h 10m
United Airlines
Deal found 6-5HK$7,503
Thu 16-711:45
HKG
-
DEN
1 stop27h 02m
United Airlines
Fri 31-713:26
DEN
-
HKG
1 stop26h 14m
United Airlines
Deal found 3-5HK$7,801
Wed 2-911:45
HKG
-
DEN
1 stop20h 25m
Multiple Airlines
Tue 17-1107:58
DEN
-
HKG
1 stop20h 17m
Multiple Airlines
Deal found 3-5HK$7,816
Thu 19-1119:40
HKG
-
DEN
2 stops19h 08m
Multiple Airlines
Tue 24-1119:00
DEN
-
HKG
2 stops23h 00m
Multiple Airlines
Deal found 6-5HK$8,067
Wed 16-912:40
HKG
-
DEN
1 stop41h 34m
United Airlines
Mon 21-919:25
DEN
-
HKG
1 stop19h 35m
United Airlines
Deal found 5-5HK$8,106
Wed 22-711:45
HKG
-
DEN
1 stop25h 58m
Multiple Airlines
Sun 16-809:52
DEN
-
HKG
1 stop18h 38m
Multiple Airlines
Deal found 4-5HK$8,255

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 8 May 2026.

Return from

HK$5,576

One-way from

HK$3,658

Popular in

January

Cheapest in

November

Average price

HK$5,537
United Airlines
  • United Airlines
  • 24-6-28-6
  • 2 total stops
  • 57h 48m total
  • Hong Kong to Denver
Search Deals
30-5
  • 30-5
  • 2 total stops
  • 54h 19m total
  • Hong Kong to Boulder
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (HK$617 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (HK$222 potential savings vs. average return price).
Search Deals
Average for return flights in May 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 8 May 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

Wed 24-6

11:45-08:35

1 stop34h 50m

Denver Intl

Sun 28-6

05:32-18:30

1 stop22h 58m

HK$5,576

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 15-9

11:45-18:10

1 stop20h 25m

Denver Intl

Sat 19-9

13:29-05:00

2 stops25h 31m

HK$7,198

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 15-9

11:45-18:10

1 stop20h 25m

Denver Intl

Sun 20-9

15:45-05:00

2 stops23h 15m

HK$7,362

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 27-8

11:45-22:11

1 stop24h 26m

Denver Intl

Mon 31-8

17:50-05:00

2 stops21h 10m

HK$7,503

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 16-7

11:45-00:47

1 stop27h 02m

Denver Intl

Fri 31-7

06:04-18:55

2 stops22h 51m

HK$7,801

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 16-9

12:40-16:14

1 stop41h 34m

Denver Intl

Mon 21-9

19:25-05:00

1 stop19h 35m

HK$8,106
Fastest return journey

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 22-6

09:25-17:58

1 stop22h 33m

Denver Intl

Sat 17-10

19:15-05:05

1 stop19h 50m

HK$8,858
Cheapest one-way

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 10-6

12:20-09:18

2 stops34h 58m

HK$4,041

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 9-6

12:20-09:18

2 stops34h 58m

HK$4,041

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 8-6

09:25-23:59

1 stop28h 34m

HK$4,057

Flights are sorted by cheapest return flights first.

Deals found on 3-5

Showing 1-10 of 16 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 17 hours 13 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$4,878

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 8 May 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
9,694 reviews
Check prices

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,694 reviews
United Airlines
7.4
Good
9,694 reviews
Check prices

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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$1,543, 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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