Frontier offers no in-flight entertainment or Wi-Fi. Bring a book or pre-load entertainment.
Frontier's UpFront Plus seats guarantee an empty middle seat for extra comfort.
$1,361+ Cheap flights from Denver (DEN) to Ko Samui (USM)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — USM
nov. 27 — dic. 41
1 adult, Economy
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Find cheap flights from Denver to Ko Samui with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap 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 octubre 28, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $1,361 (oojo) |
Find flight deals from Denver to Ko Samui
Cheapest flights from Denver to Ko SamuiExplore 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 octubre 28, 2025.
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 octubre 28, 2025.
This oojo deal was found by Cheapflights users on 10/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/254:45 pmDEN - USM
2 stops36h 50mCathay Pacific
mar. 12/211:40 amUSM - DEN
2 stops43h 59mCathay Pacific
Deal found 10/26![Cathay Pacific logo]()
$1,361
This Mytrip deal was found by Cheapflights users on 10/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/258:45 amDEN - USM
3 stops33h 25mMultiple Airlines
mar. 12/26:05 pmUSM - DEN
3 stops32h 32mMultiple Airlines
Deal found 10/26![Multiple Airlines logo]()
$1,393
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/126:00 amDEN - USM
3 stops36h 05mMultiple Airlines
vie. 12/199:20 amUSM - DEN
3 stops26h 52mMultiple Airlines
Deal found 10/27![Multiple Airlines logo]()
$2,168
This Booking.com deal was found by Cheapflights users on 10/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/176:00 amDEN - USM
3 stops36h 25mMultiple Airlines
mié. 1/149:20 amUSM - DEN
3 stops26h 55mMultiple Airlines
Deal found 10/27![Multiple Airlines logo]()
$2,395
This Singapore Airlines deal was found by Cheapflights users on 10/26. 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 Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/308:03 amDEN - USM
2 stops48h 02mSingapore Airlines
lun. 11/34:25 pmUSM - DEN
3 stops38h 01mSingapore Airlines
Deal found 10/26![Singapore Airlines logo]()
$4,271
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 octubre 28, 2025.
Use the filters below to find and compare flights from Denver to Ko Samui that are best for you.
Fly from
Denver
Fly to
Ko Samui
Route
Depart
Return
Price
DenverKo Samui
DEN - USM
DENUSM
Denver Intl
mar. 11/25
4:45 pm-7:35 pm
2 stops36h 50m
Ko Samui
mar. 12/2
11:40 am-5:39 pm
2 stops43h 59m
$1,361
DenverKo Samui
DEN - USM
DENUSM
Denver Intl
mar. 11/25
8:45 am-8:10 am
3 stops33h 25m
Ko Samui
mar. 12/2
6:05 pm-12:37 pm
3 stops32h 32m
$1,393
DenverKo Samui
DEN - USM
DENUSM
Denver Intl
vie. 12/12
6:00 am-8:05 am
3 stops36h 05m
Ko Samui
vie. 12/19
9:20 am-10:12 pm
3 stops26h 52m
$2,168
DenverKo Samui
DEN - USM
DENUSM
Denver Intl
mié. 12/17
6:00 am-8:25 am
3 stops36h 25m
Ko Samui
mié. 1/14
9:20 am-10:15 pm
3 stops26h 55m
$2,395
DenverKo Samui
DEN - USM
DENUSM
Denver Intl
vie. 12/5
8:20 pm-7:35 pm
3 stops57h 15m
$2,859
DenverKo Samui
DEN - USM
DENUSM
Denver Intl
vie. 12/5
4:45 pm-7:35 pm
2 stops36h 50m
$12,461
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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Denver-Ko Samui flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Denver-Ko Samui flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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
What is the cheapest time of day to fly from DEN to USM?
Find hourly flight availability from Denver to Ko Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated octubre 28, 2025.
It’s optimal to fly from Denver to Ko Samui in the afternoon. By choosing this option you can save up to 44% on the cost of your flight, compared to a flight in the evening.
What is the cheapest day to fly from Denver to Ko Samui?
Use this chart to determine the cheapest time to fly round-trip from Denver to Ko Samui. Price data was last updated on March 30, 2025.
Travelers seeking maximum savings on their Denver to Ko Samui flight should consider departing on Wednesday evenings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
The best insider tips for Denver to Ko Samui flights
Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Denver to Ko Samui trip
Airlines
![Frontier]()
Frontier
![United Airlines]()
United Airlines
United's Polaris Business Class offers lie-flat seats and Saks Fifth Avenue bedding.
United's Premium Plus includes extra legroom, upgraded meals, and two checked bags.
Our travel experts
Related info for your journey
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Traveling to a place near Ko Samui?
Book flights to Ko Samui if you plan to visit one of these locationsKo Tao
Ko Pha Ngan