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Ko Samui

$520+ Cheap flights from Denver (DEN) to Ko Samui (USM)

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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — USM
Aug 29 — Sep 51
Sat 8/29
Sat 9/5
1 adult, Economy
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Cheap flight deals from Denver to Ko Samui

Cheapest flights from Denver to Ko Samui
Explore the most affordable flight options available from Denver to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2026.

This IEagle deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/186:31 pm
DEN
-
USM
3 stops30h 24m
Multiple Airlines
Mon 11/232:05 pm
USM
-
DEN
3 stops23h 50m
Multiple Airlines
Deal found 7/30$1,441
This Gotogate deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:50 pm
DEN
-
USM
2 stops25h 45m
Multiple Airlines
Wed 10/284:25 pm
USM
-
DEN
2 stops38h 48m
Multiple Airlines
Deal found 7/29$1,467
This IEagle deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/186:31 pm
DEN
-
USM
3 stops30h 24m
Multiple Airlines
Tue 11/242:05 pm
USM
-
DEN
3 stops23h 50m
Multiple Airlines
Deal found 7/30$1,490
This FlightHub deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/307:00 pm
DEN
-
USM
2 stops26h 35m
Multiple Airlines
Sun 11/157:10 pm
USM
-
DEN
2 stops31h 28m
Multiple Airlines
Deal found 7/27$1,495
This Expedia deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/184:51 pm
DEN
-
USM
2 stops37h 49m
Multiple Airlines
Sun 9/277:15 pm
USM
-
DEN
2 stops40h 53m
Multiple Airlines
Deal found 7/26$1,498

Find flight deals from Denver to Ko Samui

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Ko Samui (USM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 30, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$1,441
(IEagle)

One-way from

$520
(Kiwi.com)
Provider with most accurate pricing for Denver Intl-Ko Samui flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Ko Samui flights.
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From Denver Intl to Ko Samui
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One-way flight from Denver Intl to Ko Samui
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver to Ko Samui that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 30, 2026.
Use the filters below to find and compare flights from Denver to Ko Samui that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

DenverKo Samui

DEN - USM

DENUSM

Denver Intl

Sat 10/24

7:50 pm-10:35 am

2 stops25h 45m

Ko Samui

Wed 10/28

10:00 am-10:37 pm

3 stops25h 37m

$1,544

DenverKo Samui

DEN - USM

DENUSM

Denver Intl

Fri 9/18

5:41 pm-2:45 pm

3 stops32h 04m

Ko Samui

Sun 9/27

8:50 pm-4:58 pm

2 stops33h 08m

$1,597

DenverKo Samui

DEN - USM

DENUSM

Denver Intl

Thu 10/1

9:18 pm-1:10 pm

3 stops26h 52m

Ko Samui

Sat 10/17

9:15 am-10:29 pm

3 stops26h 14m

$1,631

DenverKo Samui

DEN - USM

DENUSM

Denver Intl

Thu 10/1

6:11 pm-7:40 pm

2 stops60h 29m

Ko Samui

Sat 10/17

11:55 am-9:55 pm

2 stops47h 00m

$1,662
Cheapest one-way
Quickest one-way

DenverKo Samui

DEN - USM

DENUSM

Denver Intl

Wed 9/2

7:25 am-7:10 am

3 stops34h 45m

$520

DenverKo Samui

DEN - USM

DENUSM

Denver Intl

Wed 9/23

8:00 pm-9:20 am

3 stops48h 20m

$2,886

DenverKo Samui

DEN - USM

DENUSM

Denver Intl

Wed 9/23

6:11 pm-7:40 pm

2 stops60h 29m

$3,870

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Sorted by cheapest first

Compare providers for flights from Denver to Ko Samui

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to Ko Samui in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Denver-Ko Samui flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Denver-Ko Samui flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Denver-Ko Samui flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Ko Samui flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Denver-Ko Samui flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Denver to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Denver with our price prediction graph.
Estimated round-trip 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 from Denver to Ko Samui

How often are flights from Denver to Ko Samui delayed?

About 17% of weekly flights between Denver and Ko Samui have experienced delays in the past year, with the average delay time being 130 minutes.

What is the most punctual flight time for Denver to Ko Samui flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Denver to Ko Samui flights?

Over the last year, United Airlines have had the lowest number of delays on this route, with just 10% of flights being delayed.

The best insider tips for Denver to Ko Samui flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Denver to Ko Samui trip
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more

Related info for your journey

Find useful and relevant information for your journey from Denver to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find deals for flights from Denver to Ko Samui that include hotel bookings?

    Yes. In addition to deals on Denver to Ko Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Denver to Ko Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Denver to Ko Samui.

  • Can I find deals for business class flights from Denver to Ko Samui?

    Yes. Cheapflights offers flight deals from Denver to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Traveling to a place near Ko Samui?

Book flights to Ko Samui if you plan to visit one of these locations
Ko Tao
Ko Pha Ngan

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