Find flights
Airlines

HK$3,280+ 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 1-11. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
16 11월 — 23 11월1
1 adult
1 adult, Economy

Flights to Boulder in 2025

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 17 10월 2025.

Return from

HK$5,510

One-way from

HK$3,280

Popular in

November

Cheapest in

February

Average price

HK$8,222
United Airlines
  • United Airlines
  • 2-3-5-3
  • 2 total stops
  • 62h 12m total
  • Hong Kong to Denver
Search Deals
1-11
  • 1-11
  • 2 total stops
  • 59h 07m total
  • Hong Kong to Boulder
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (HK$1,256 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (HK$405 potential savings vs. average return price).
Search Deals
Average for return flights in October 2025
Search Deals

Find flight deals to Boulder

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 17 10월 2025.

수 5-1110:35HKG - DEN
1 stop16h 34mUnited Airlines
금 14-1108:03DEN - HKG
1 stop20h 12mUnited Airlines
Deal found 15-10HK$5,510
일 30-1113:40HKG - DEN
2 stops42h 07mMultiple Airlines
목 8-111:49DEN - HKG
2 stops31h 26mMultiple Airlines
Deal found 16-10HK$6,466
수 12-1111:15HKG - DEN
2 stops27h 44m星宇航空
수 10-1215:42DEN - HKG
2 stops27h 28m星宇航空
Deal found 16-10HK$6,893
수 5-1115:30HKG - DEN
2 stops23h 29mMultiple Airlines
금 14-1120:05DEN - HKG
2 stops21h 55mMultiple Airlines
Deal found 15-10HK$7,562
화 4-1100:40HKG - DEN
2 stops28h 47mAsiana Airlines
금 14-1106:00DEN - HKG
2 stops25h 40mAsiana Airlines
Deal found 15-10HK$7,709
수 12-1110:35HKG - DEN
1 stop21h 08mUnited Airlines
수 10-1211:30DEN - HKG
2 stops34h 25mUnited Airlines
Deal found 16-10HK$7,733
일 30-1120:25HKG - DEN
2 stops36h 38mAir Canada
일 7-1211:18DEN - HKG
2 stops40h 22mAir Canada
Deal found 16-10HK$8,051
일 30-1120:25HKG - DEN
2 stops36h 38mAir Canada
목 8-111:46DEN - HKG
1 stop27h 29mAir Canada
Deal found 16-10HK$8,106
화 11-1100:40HKG - DEN
2 stops28h 47mAsiana Airlines
수 10-1219:24DEN - HKG
2 stops36h 16mAsiana Airlines
Deal found 16-10HK$8,549
화 11-1100:30HKG - DEN
1 stop26h 51mMultiple Airlines
수 10-1214:48DEN - HKG
1 stop23h 47mMultiple Airlines
Deal found 16-10HK$9,481

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 17 10월 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

수 5-11

22:30-00:30

1 stop17h 00m

Denver Intl

금 14-11

21:23-19:20

2 stops30h 57m

HK$5,510

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

월 2-3

10:35-14:52

1 stop19h 17m

Denver Intl

목 5-3

21:25-19:15

1 stop30h 50m

HK$5,510

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

수 5-11

15:30-23:59

2 stops23h 29m

Denver Intl

금 14-11

20:05-09:00

2 stops21h 55m

HK$7,562

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

화 4-11

00:40-14:27

2 stops28h 47m

Denver Intl

금 14-11

06:00-22:40

2 stops25h 40m

HK$7,709

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

수 12-11

10:35-16:43

1 stop21h 08m

Denver Intl

수 10-12

11:30-12:55

2 stops34h 25m

HK$7,733

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

화 17-3

11:15-22:39

2 stops25h 24m

Denver Intl

목 23-4

19:50-18:55

2 stops33h 05m

HK$7,748

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

화 17-3

11:15-22:39

2 stops25h 24m

Denver Intl

토 25-4

19:50-09:55

2 stops24h 05m

HK$7,748

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

화 17-3

11:15-22:39

2 stops25h 24m

Denver Intl

금 24-4

19:50-09:55

2 stops24h 05m

HK$7,748

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

일 15-3

00:40-22:24

2 stops35h 44m

Denver Intl

목 23-4

07:58-22:30

2 stops24h 32m

HK$7,919

Hong KongDenver

HKG - DEN

HKGDEN

Hong Kong Intl

일 15-3

00:40-22:24

2 stops35h 44m

Denver Intl

수 22-4

19:45-22:30

2 stops36h 45m

HK$7,919

Flights are sorted by cheapest return flights first.

Deals found on 15-10

Showing 1-10 of 15 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 16 hours 34 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$6,458

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 17 10월 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
8,982 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Crew

8.1

Food

6.6

Boarding

7.7

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
United Airlines
7.4
Good
8,982 reviews
United Airlines
7.4
Good
8,982 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Crew

8.1

Food

6.6

Boarding

7.7

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

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$164, however they can be found for as little as HK$164.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Search flights to Boulder by cabin class

Find flights to Boulder, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy class

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights to Boulder?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights to Boulder. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets to Boulder?

Cheapflights helps you find that perfect flight to Boulder by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights to Boulder with no change fees?

Yes, we can. To see specific flights to Boulder with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights to Boulder become cheaper?

Yes, Cheapflights has a feature called Price Alerts, which notifies users when flight prices change. Track prices for your flight to Boulder today and book when you’re ready!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.