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HK$3,467+ 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
2 Feb — 9 Feb1
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 3 January 2026.

Thu 22-122:30HKG - DEN
1 stop26h 35mUnited Airlines
Thu 12-217:33DEN - HKG
1 stop22h 27mUnited Airlines
Deal found 1-1HK$5,228
Sat 28-210:35HKG - DEN
1 stop24h 29mUnited Airlines
Wed 4-311:22DEN - HKG
1 stop28h 38mUnited Airlines
Deal found 1-1HK$5,461
Mon 2-210:35HKG - DEN
1 stop24h 37mUnited Airlines
Mon 9-213:52DEN - HKG
2 stops25h 53mUnited Airlines
Deal found 2-1HK$5,555
Sat 26-911:45HKG - DEN
1 stop22h 43mUnited Airlines
Sun 18-1006:00DEN - HKG
2 stops22h 55mUnited Airlines
Deal found 2-1HK$5,765
Tue 27-110:35HKG - DEN
1 stop38h 30mUnited Airlines
Sat 21-211:45DEN - HKG
2 stops28h 00mUnited Airlines
Deal found 2-1HK$5,796
Thu 22-110:35HKG - DEN
1 stop22h 48mUnited Airlines
Fri 20-216:02DEN - HKG
2 stops23h 43mUnited Airlines
Deal found 2-1HK$5,804
Thu 29-110:35HKG - DEN
1 stop19h 19mMultiple Airlines
Sun 22-219:35DEN - HKG
1 stop20h 25mMultiple Airlines
Deal found 2-1HK$6,124
Fri 30-110:35HKG - DEN
1 stop19h 19mMultiple Airlines
Thu 19-217:33DEN - HKG
1 stop22h 27mMultiple Airlines
Deal found 2-1HK$6,139
Fri 30-122:30HKG - DEN
1 stop17h 29mUnited Airlines
Sat 21-219:35DEN - HKG
1 stop20h 25mUnited Airlines
Deal found 2-1HK$6,155

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 3 January 2026.

Return from

HK$5,228

One-way from

HK$3,467

Popular in

December

Cheapest in

November

Average price

HK$8,609
United Airlines
  • United Airlines
  • 22-1-12-2
  • 2 total stops
  • 49h 02m total
  • Hong Kong to Denver
Search Deals
27-1
  • 27-1
  • 2 total stops
  • 36h 41m total
  • Hong Kong to Boulder
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (HK$109 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (HK$184 potential savings vs. average return price).
Search Deals
Average for return flights in January 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 3 January 2026.
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

Thu 22-1

22:30-10:05

1 stop26h 35m

Denver Intl

Thu 12-2

17:33-07:00

1 stop22h 27m

HK$5,228

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sat 28-2

10:35-12:18

1 stop16h 43m

Denver Intl

Wed 4-3

13:45-06:45

2 stops26h 00m

HK$5,461

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Sun 1-2

11:25-16:32

1 stop44h 07m

Denver Intl

Sun 8-2

19:41-06:45

1 stop20h 04m

HK$6,163

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 22-1

20:25-08:54

2 stops27h 29m

Denver Intl

Thu 12-2

19:25-18:40

2 stops32h 15m

HK$6,996

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Fri 23-1

20:25-18:07

2 stops36h 42m

Denver Intl

Thu 19-2

20:59-18:40

1 stop30h 41m

HK$7,308

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 27-1

19:45-17:26

2 stops36h 41m

HK$3,467

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Tue 3-3

19:45-11:11

2 stops30h 26m

HK$3,638

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Fri 30-1

19:45-10:30

2 stops29h 45m

HK$3,654

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Mon 23-2

17:35-23:59

2 stops21h 24m

HK$3,662

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

Thu 29-1

19:45-09:59

2 stops29h 14m

HK$3,685

Flights are sorted by cheapest return flights first.

Deals found on 1-1

Showing 1-10 of 14 results
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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 25 hours 9 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$4,856

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 3 January 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
9,137 reviews
Check prices

Boarding

7.7

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

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
9,137 reviews
United Airlines
7.4
Good
9,137 reviews
Check prices

Boarding

7.7

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

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$8,733, however they can be found for as little as HK$607.

  • 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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