RM 4,740+ Cheap flights to Boulder
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
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 407,431 searches and data was last updated on 30 July 2025.
Find flight deals to Boulder
Cheapest flights to BoulderExplore the most affordable flight options available to Boulder. Find the lowest fares based on data from user searches, with prices last updated on 30 July 2025.
Explore the most affordable flight options available to Boulder. Find the lowest fares based on data from user searches, with prices last updated on 30 July 2025.
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Use the filters below to find and compare flights to Boulder that are best for you.
Fly from
Route
Departure
Return
Price
Kuala LumpurDenver
KUL - DEN
KULDEN
Kuala Lumpur Intl
Sun 5/10
07:15-12:05
1 stop18h 50m
Denver Intl
Wed 8/10
08:00-23:55
2 stops25h 55m
Kuala LumpurDenver
KUL - DEN
KULDEN
Kuala Lumpur Intl
Wed 10/9
14:45-00:26
2 stops23h 41m
Denver Intl
Wed 17/9
11:15-13:25
2 stops36h 10m
Kuala LumpurDenver
KUL - DEN
KULDEN
Kuala Lumpur Intl
Wed 20/8
07:15-20:47
2 stops27h 32m
Denver Intl
Tue 2/9
11:30-23:55
1 stop22h 25m
Kuala LumpurDenver
KUL - DEN
KULDEN
Kuala Lumpur Intl
Wed 10/9
22:50-16:25
1 stop31h 35m
Denver Intl
Wed 17/9
14:47-17:20
2 stops36h 33m
Kuala LumpurDenver
KUL - DEN
KULDEN
Kuala Lumpur Intl
Tue 9/9
02:55-10:40
2 stops45h 45m
Denver Intl
Wed 17/9
11:25-14:45
2 stops37h 20m
Kuala LumpurDenver
KUL - DEN
KULDEN
Kuala Lumpur Intl
Wed 20/8
22:00-19:40
3 stops35h 40m
Denver Intl
Tue 2/9
17:55-10:10
2 stops26h 15m
Kuala LumpurDenver
KUL - DEN
KULDEN
Kuala Lumpur Intl
Thu 11/9
05:20-17:55
1 stop26h 35m
Denver Intl
Thu 18/9
19:50-09:10
1 stop23h 20m
Kuala LumpurDenver
KUL - DEN
KULDEN
Kuala Lumpur Intl
Tue 19/8
01:55-18:21
2 stops30h 26m
Denver Intl
Tue 2/9
06:45-00:55
2 stops28h 10m
Kuala LumpurDenver
KUL - DEN
KULDEN
Kuala Lumpur Intl
Wed 10/9
02:15-20:12
2 stops31h 57m
Denver Intl
Thu 18/9
14:45-08:40
2 stops27h 55m
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.
Cheapflights Insights
Everything you need to know about your flight to Boulder
When is the best time to book a flight to Boulder?
Use this chart to determine the optimal time to book a return flight from Kuala Lumpur to Boulder. Price data was last updated on 25 July 2025.
The price you pay for your flight to Boulder may vary depending on when you book. For the best chance of a lower fare, look to book 25 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
How long is the flight to Boulder?
On average, a flight from Kuala Lumpur to Boulder takes 18 hours 50 minutes. Flights to Boulder from other popular cities in Malaysia 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 airlines flying from Kuala Lumpur to Boulder are United Airlines, ANA and Turkish Airlines.
What are the cheapest airlines that fly to Boulder?
The cheapest airlines flying from Kuala Lumpur to Boulder are United Airlines, Turkish Airlines and ANA.
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 July 2025.
Get a feel of what it's like to fly with ANA, Emirates, andSingapore Airlines to the United States by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
Boarding
Crew
Entertainment
Food
Overall
Reviews
Anonymous,Jul 2025
MNL - NRT
Comfort
Boarding
Crew
Entertainment
Food
Overall
Reviews
Anonymous,Jul 2025
MNL - NRT
Comfort
Boarding
Crew
Entertainment
Food
Overall
Reviews
Anonymous,Jul 2025
MNL - NRT
Comfort
Boarding
Crew
Entertainment
Food
Overall
Reviews
Anonymous,Jul 2025
MNL - NRT
Comfort
Boarding
Crew
Entertainment
Food
Overall
Reviews
Anonymous,Jul 2025
MNL - NRT
Comfort
Boarding
Crew
Entertainment
Food
Overall
Reviews
Anonymous,Jul 2025
MNL - NRT
FAQs about flying to Boulder
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