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HK$3,348+ 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
1 Apr — 8 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 2 März 2026.

Mi 18-310:35
HKG
-
DEN
1 stop20h 05m
United Airlines
So 22-320:00
DEN
-
HKG
1 stop33h 15m
United Airlines
Deal found 1-3HK$4,857
Fr 1-511:45
HKG
-
DEN
1 stop23h 03m
United Airlines
Di 12-511:25
DEN
-
HKG
1 stop28h 15m
United Airlines
Deal found 1-3HK$4,873
Do 30-411:45
HKG
-
DEN
1 stop17h 58m
United Airlines
Do 7-519:05
DEN
-
HKG
1 stop20h 35m
United Airlines
Deal found 27-2HK$4,936
Fr 1-511:45
HKG
-
DEN
1 stop17h 14m
United Airlines
Fr 8-508:00
DEN
-
HKG
1 stop20h 30m
United Airlines
Deal found 26-2HK$5,530
Do 16-413:25
HKG
-
DEN
1 stop20h 46m
Multiple Airlines
Do 23-406:00
DEN
-
HKG
1 stop20h 45m
Multiple Airlines
Deal found 1-3HK$6,265
Do 30-413:30
HKG
-
DEN
2 stops46h 19m
EVA Air
Do 7-517:00
DEN
-
HKG
2 stops27h 05m
EVA Air
Deal found 27-2HK$6,312
Di 14-419:40
HKG
-
DEN
2 stops29h 11m
EVA Air
Di 21-419:24
DEN
-
HKG
2 stops23h 26m
EVA Air
Deal found 28-2HK$6,469
Fr 1-509:45
HKG
-
DEN
2 stops24h 43m
Air Canada
Di 12-509:40
DEN
-
HKG
2 stops29h 35m
Air Canada
Deal found 1-3HK$6,656

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 2 März 2026.

Return from

HK$4,521

One-way from

HK$3,348

Popular in

January

Cheapest in

November

Average price

HK$7,791
United Airlines
  • United Airlines
  • 18-6-27-6
  • 2 total stops
  • 42h 46m 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. 10% potential increase in price (HK$865 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (HK$231 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 2 März 2026.
Use the filters below to find and compare flights to Boulder that are best for you.

Fly from

Route

Departure

Return

Price

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Di 14-4

11:45-14:34

1 stop16h 49m

Denver Intl

Di 21-4

17:42-05:00

2 stops21h 18m

HK$4,873

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Fr 1-5

11:45-14:59

1 stop17h 14m

Denver Intl

Do 7-5

17:25-05:40

1 stop22h 15m

HK$4,873

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mi 18-3

10:35-14:55

1 stop18h 20m

Denver Intl

So 22-3

20:00-19:15

1 stop33h 15m

HK$5,162

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Fr 1-5

11:45-14:59

1 stop17h 14m

Denver Intl

Fr 8-5

08:00-18:30

1 stop20h 30m

HK$5,530

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Do 16-4

09:45-10:18

2 stops38h 33m

Denver Intl

Do 23-4

08:45-05:15

1 stop30h 30m

HK$6,758

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Fr 1-5

15:25-22:50

2 stops21h 25m

Denver Intl

Fr 8-5

21:20-08:50

2 stops21h 30m

HK$7,407

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Di 17-3

00:55-17:30

2 stops30h 35m

Denver Intl

So 22-3

06:30-23:10

2 stops26h 40m

HK$8,604

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

So 3-5

20:10-09:45

2 stops27h 35m

HK$3,449

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mo 1-6

20:10-11:24

2 stops29h 14m

HK$3,473

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Fr 1-5

19:40-09:43

3 stops28h 03m

HK$3,825

Flights are sorted by cheapest return flights first.

Deals found on 26-2

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 20 hours 5 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$4,871

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 2 März 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
9,375 reviews
Check prices

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

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
9,375 reviews
United Airlines
7.4
Good
9,375 reviews
Check prices

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

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$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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