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HK$3,993+ 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 11-5. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
18 May — 25 May1
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 April 2026.

Fri 19-611:45
HKG
-
DEN
1 stop24h 59m
United Airlines
Fri 4-913:29
DEN
-
HKG
2 stops25h 31m
United Airlines
Deal found 13-4HK$5,755
Thu 29-1010:35
HKG
-
DEN
1 stop21h 43m
United Airlines
Mon 2-1113:29
DEN
-
HKG
2 stops26h 16m
United Airlines
Deal found 13-4HK$7,140
Thu 1-1022:30
HKG
-
DEN
1 stop24h 09m
United Airlines
Sun 4-1006:00
DEN
-
HKG
2 stops22h 55m
United Airlines
Deal found 13-4HK$7,172
Tue 15-911:45
HKG
-
DEN
1 stop22h 21m
United Airlines
Mon 21-907:58
DEN
-
HKG
1 stop20h 32m
United Airlines
Deal found 17-4HK$7,367
Thu 29-1009:45
HKG
-
DEN
2 stops38h 38m
Air Canada
Mon 2-1119:05
DEN
-
HKG
2 stops43h 05m
Air Canada
Deal found 15-4HK$8,377
Wed 16-913:30
HKG
-
DEN
2 stops35h 35m
EVA Air
Sun 20-919:28
DEN
-
HKG
2 stops23h 22m
EVA Air
Deal found 17-4HK$8,463
Sat 20-609:45
HKG
-
DEN
2 stops38h 50m
Air Canada
Wed 24-611:25
DEN
-
HKG
2 stops27h 50m
Air Canada
Deal found 16-4HK$8,518
Fri 19-609:45
HKG
-
DEN
2 stops38h 48m
Multiple Airlines
Fri 4-913:29
DEN
-
HKG
2 stops25h 46m
Multiple Airlines
Deal found 13-4HK$8,667
Tue 15-909:45
HKG
-
DEN
2 stops36h 49m
Air Canada
Sun 20-918:10
DEN
-
HKG
2 stops45h 05m
Air Canada
Deal found 17-4HK$8,691

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 April 2026.

Return from

HK$5,755

One-way from

HK$3,993

Popular in

January

Cheapest in

November

Average price

HK$7,313
United Airlines
  • United Airlines
  • 19-6-4-9
  • 3 total stops
  • 50h 30m total
  • Hong Kong to Denver
Search Deals
11-5
  • 11-5
  • 2 total stops
  • 41h 34m total
  • Hong Kong to Boulder
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (HK$636 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (HK$224 potential savings vs. average return price).
Search Deals
Average for return flights in April 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 April 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

Sun 21-6

11:45-00:47

1 stop27h 02m

Denver Intl

Sat 5-9

15:45-05:40

1 stop23h 55m

HK$5,755

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 1-10

11:45-18:18

1 stop20h 33m

Denver Intl

Sun 4-10

21:25-18:30

1 stop31h 05m

HK$7,140

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Fri 2-10

11:45-20:28

1 stop22h 43m

Denver Intl

Sun 4-10

21:25-18:30

1 stop31h 05m

HK$7,172

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 10-9

22:30-08:40

1 stop24h 10m

Denver Intl

Sat 12-9

17:50-05:40

1 stop21h 50m

HK$7,367

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 16-9

11:45-16:40

1 stop18h 55m

Denver Intl

Sun 20-9

11:24-05:00

2 stops27h 36m

HK$7,367

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 15-9

11:45-20:06

1 stop22h 21m

Denver Intl

Mon 21-9

07:58-18:30

1 stop20h 32m

HK$7,367

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 10-9

09:45-20:17

2 stops24h 32m

Denver Intl

Sat 12-9

13:29-05:15

2 stops25h 46m

HK$9,552

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 3-6

15:25-22:45

2 stops21h 20m

Denver Intl

Wed 1-7

21:05-08:50

2 stops21h 45m

HK$9,982

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 3-8

11:45-09:59

1 stop36h 14m

Denver Intl

Sat 12-9

13:29-05:00

2 stops25h 31m

HK$10,006

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 17-9

19:40-20:23

2 stops38h 43m

Denver Intl

Mon 21-9

10:43-15:10

2 stops38h 27m

HK$10,656

Flights are sorted by cheapest return flights first.

Deals found on 14-4

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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 21 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$4,876

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 April 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
9,605 reviews
Check prices

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

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
9,605 reviews
United Airlines
7.4
Good
9,605 reviews
Check prices

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

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$1,542, 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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