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HK$3,195+ 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 27-1. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
29 Jan — 5 Feb1
1 adult
1 adult, Economy, 0 bags

Flights to Boulder in 2025

Enter your travel dates to find the best prices.

Best flights to Boulder
Discover carefully curated flight deals to Boulder that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 30 December 2025.

Sun 8-210:35HKG - DEN
1 stop26h 51mUnited Airlines
Fri 27-219:20DEN - HKG
2 stops33h 00mUnited Airlines
Deal found 28-12HK$4,851
Tue 20-120:25HKG - DEN
2 stops28h 58mAir Canada
Wed 11-208:05DEN - HKG
1 stop19h 35mAir Canada
Deal found 29-12HK$6,320
Thu 22-122:30HKG - DEN
1 stop28h 53mUnited Airlines
Thu 19-211:15DEN - HKG
2 stops28h 30mUnited Airlines
Deal found 29-12HK$4,851
Thu 29-111:25HKG - DEN
1 stop44h 07mUnited Airlines
Thu 19-207:45DEN - HKG
1 stop20h 35mUnited Airlines
Deal found 29-12HK$5,154
Thu 5-310:35HKG - DEN
1 stop16h 43mUnited Airlines
Sun 8-321:12DEN - HKG
1 stop32h 03mUnited Airlines
Deal found 27-12HK$5,154
Thu 29-120:25HKG - DEN
2 stops28h 58mAir Canada
Wed 18-208:05DEN - HKG
1 stop19h 35mAir Canada
Deal found 29-12HK$6,320
Mon 19-120:25HKG - DEN
2 stops28h 58mAir Canada
Sun 22-221:11DEN - HKG
2 stops30h 29mAir Canada
Deal found 29-12HK$6,359
Sat 28-210:35HKG - DEN
1 stop16h 43mUnited Airlines
Wed 4-321:11DEN - HKG
2 stops31h 09mUnited Airlines
Deal found 29-12HK$5,449

Find flight deals to Boulder

Find the latest flights to Boulder in 2025, 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 30 December 2025.

Return from

HK$4,851

One-way from

HK$3,195

Popular in

January

Cheapest in

November

Average price

HK$8,434
United Airlines
  • United Airlines
  • 22-1-19-2
  • 3 total stops
  • 57h 23m total
  • Hong Kong to Denver
Search Deals
27-1
  • 27-1
  • 2 total stops
  • 36h 31m total
  • Hong Kong to Boulder
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (HK$516 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (HK$143 potential savings vs. average return price).
Search Deals
Average for return flights in December 2025
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 30 December 2025.
Use the filters below to find and compare flights to Boulder that are best for you.

Fly from

Hong Kong

Route

Departure

Return

Price

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sun 8-2

10:35-22:26

1 stop26h 51m

Denver Intl

Fri 27-2

19:20-19:20

2 stops33h 00m

HK$4,851

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 22-1

22:30-12:23

1 stop28h 53m

Denver Intl

Thu 19-2

11:15-06:45

2 stops28h 30m

HK$4,851

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 29-1

11:25-16:32

1 stop44h 07m

Denver Intl

Thu 19-2

07:45-19:20

1 stop20h 35m

HK$5,154

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 5-3

10:35-12:18

1 stop16h 43m

Denver Intl

Sun 8-3

21:12-19:15

1 stop32h 03m

HK$5,154

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sat 28-2

10:35-12:18

1 stop16h 43m

Denver Intl

Wed 4-3

21:11-19:20

2 stops31h 09m

HK$5,449

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 20-1

20:25-10:23

2 stops28h 58m

Denver Intl

Wed 11-2

08:05-18:40

1 stop19h 35m

HK$6,320

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 29-1

20:25-10:23

2 stops28h 58m

Denver Intl

Wed 18-2

08:05-18:40

1 stop19h 35m

HK$6,320

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 19-1

20:25-10:23

2 stops28h 58m

Denver Intl

Sun 22-2

21:11-18:40

2 stops30h 29m

HK$6,359

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 27-1

19:55-17:26

2 stops36h 31m

HK$3,195

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Wed 4-2

13:40-16:25

2 stops41h 45m

HK$3,288

Flights are sorted by cheapest return flights first.

Deals found on 29-12

Showing 1-10 of 18 results
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 19 hours 20 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$4,845

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 30 December 2025.
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
9,122 reviews
Check prices

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,122 reviews
United Airlines
7.4
Good
9,122 reviews
Check prices

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

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$8,713, however they can be found for as little as HK$605.

  • 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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