$1,370+ 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 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — USM
Apr 15 — Apr 221
Round-trip
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
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Best
Last-minute
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 March 16, 2026.
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 March 16, 2026.
This Gurufare deal was found by Cheapflights users on 3/14. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/217:00 pm
DEN
- USM
3 stops29h 55m
Multiple Airlines
Sun 11/299:10 pm
USM
- DEN
3 stops38h 51m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$1,370
This KAYAK deal was found by Cheapflights users on 3/12. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/19:40 am
DEN
- USM
3 stops32h 30m
Cathay Pacific
Sun 9/611:55 am
USM
- DEN
2 stops36h 33m
Cathay Pacific
Deal found 3/12![Cathay Pacific logo]()
$1,376
This BusinessClass deal was found by Cheapflights users on 3/12. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:00 am
DEN
- USM
3 stops34h 10m
Multiple Airlines
Sat 10/1711:55 am
USM
- DEN
2 stops36h 33m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$1,380
This Gotogate deal was found by Cheapflights users on 3/15. 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.
Fri 11/278:05 am
DEN
- USM
3 stops33h 05m
Multiple Airlines
Sun 12/69:10 pm
USM
- DEN
2 stops29h 27m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$1,387
This oojo deal was found by Cheapflights users on 3/12. 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.
Thu 10/15:44 pm
DEN
- USM
2 stops60h 56m
Cathay Pacific
Sat 10/1711:55 am
USM
- DEN
2 stops36h 33m
Cathay Pacific
Deal found 3/12![Cathay Pacific logo]()
$1,406
This EVA Air deal was found by Cheapflights users on 3/12. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/19:25 pm
DEN
- USM
3 stops27h 20m
Multiple Airlines
Sun 9/68:45 am
USM
- DEN
3 stops26h 16m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$1,442
This EVA Air deal was found by Cheapflights users on 3/15. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/309:25 pm
DEN
- USM
3 stops28h 30m
Multiple Airlines
Sun 11/152:05 pm
USM
- DEN
3 stops24h 38m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$1,491
This Gotogate deal was found by Cheapflights users on 3/15. 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.
Wed 4/297:05 pm
DEN
- USM
2 stops27h 35m
Multiple Airlines
Wed 5/64:25 pm
USM
- DEN
2 stops37h 35m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$1,524
Best flights from Denver to Ko SamuiDiscover carefully curated flight deals from Denver to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 16, 2026.
Discover carefully curated flight deals from Denver to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 16, 2026.
This Gotogate deal was found by Cheapflights users on 3/15. 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.
Wed 4/297:05 pm
DEN
- USM
2 stops27h 35m
Multiple Airlines
Wed 5/64:25 pm
USM
- DEN
2 stops37h 35m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$1,524
This oojo deal was found by Cheapflights users on 3/14. 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.
Fri 4/178:35 pm
DEN
- USM
2 stops58h 05m
Cathay Pacific
Fri 5/111:55 am
USM
- DEN
2 stops37h 11m
Cathay Pacific
Deal found 3/14![Cathay Pacific logo]()
$1,605
This EVA Air deal was found by Cheapflights users on 3/12. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/269:17 pm
DEN
- USM
3 stops27h 28m
Multiple Airlines
Sun 5/38:45 am
USM
- DEN
3 stops27h 52m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$1,562
This EVA Air deal was found by Cheapflights users on 3/15. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/179:02 pm
DEN
- USM
3 stops27h 43m
Multiple Airlines
Fri 5/18:45 am
USM
- DEN
3 stops27h 12m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$1,771
This EVA Air deal was found by Cheapflights users on 3/11. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/159:20 pm
DEN
- USM
3 stops27h 25m
Multiple Airlines
Fri 5/299:15 am
USM
- DEN
3 stops26h 29m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$1,821
Last-minute flights from Denver to Ko SamuiDiscover last-minute flight deals from Denver to Ko Samui. Data last updated March 16, 2026 and is based on user searches.
Discover last-minute flight deals from Denver to Ko Samui. Data last updated March 16, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 3/14. 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.
Wed 3/187:05 pm
DEN
- USM
2 stops34h 10m
Multiple Airlines
Fri 3/209:40 pm
USM
- DEN
2 stops27h 57m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$11,103
This business-class.com deal was found by Cheapflights users on 3/12. 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 business-class.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/26:43 pm
DEN
- USM
2 stops35h 57m
Multiple Airlines
Sat 4/114:00 pm
USM
- DEN
3 stops33h 18m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$4,964
This Arangrant deal was found by Cheapflights users on 3/14. 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 Arangrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/24:05 pm
DEN
- USM
2 stops32h 05m
Lufthansa
Sat 4/117:50 pm
USM
- DEN
2 stops31h 30m
Lufthansa
Deal found 3/14![Lufthansa logo]()
$14,065
This oojo deal was found by Cheapflights users on 3/15. 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.
Fri 4/176:20 pm
DEN
- USM
2 stops60h 20m
Cathay Pacific
Fri 5/111:55 am
USM
- DEN
2 stops37h 11m
Cathay Pacific
Deal found 3/15![Cathay Pacific logo]()
$1,605
This EVA Air deal was found by Cheapflights users on 3/15. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/179:02 pm
DEN
- USM
3 stops27h 43m
Multiple Airlines
Fri 5/18:45 am
USM
- DEN
3 stops27h 12m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$1,771
This EVA Air deal was found by Cheapflights users on 3/12. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/269:17 pm
DEN
- USM
3 stops27h 28m
Multiple Airlines
Sun 5/38:45 am
USM
- DEN
3 stops27h 52m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$1,562
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 March 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,376 (KAYAK) |
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 March 16, 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
Cheapest round-trip
DenverKo Samui
DEN - USM
DENUSM
Denver Intl
Wed 4/29
7:05 pm-11:40 am
2 stops27h 35m
Ko Samui
Wed 5/6
4:25 pm-5:00 pm
2 stops37h 35m
$1,524
DenverKo Samui
DEN - USM
DENUSM
Denver Intl
Sun 4/26
9:17 pm-1:45 pm
3 stops27h 28m
Ko Samui
Sun 5/3
8:45 am-11:37 pm
3 stops27h 52m
$1,562
DenverKo Samui
DEN - USM
DENUSM
Denver Intl
Fri 4/17
8:35 pm-7:40 pm
2 stops58h 05m
Ko Samui
Fri 5/1
11:55 am-12:06 pm
2 stops37h 11m
$1,605
DenverKo Samui
DEN - USM
DENUSM
Denver Intl
Fri 4/17
9:02 pm-1:45 pm
3 stops27h 43m
Ko Samui
Fri 5/1
8:45 am-10:57 pm
3 stops27h 12m
$1,771
Quickest round-trip
DenverKo Samui
DEN - USM
DENUSM
Denver Intl
Fri 5/15
9:20 pm-1:45 pm
3 stops27h 25m
Ko Samui
Fri 5/29
9:15 am-10:44 pm
3 stops26h 29m
$1,821
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 March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars |
- Most accurate provider: When it comes to deals on Denver-Ko Samui flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Ko Samui flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.
DEN-USM
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
Prices
Delays
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 March 16, 2026.
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.
How often are flights from Denver to Ko Samui delayed?
About 22% of weekly flights between Denver and Ko Samui have experienced delays in the past year, with the average delay time being 133 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 in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Saturday tends to have the lowest number of delays on this route, whereas Thursday 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 16% 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
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.
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
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