Cheap flights from Denver (DEN) to Koh Samui (USM)

sep. 26 — oct. 31

How to find the cheapest flight from Denver (DEN) to Koh Samui (USM)

All the information you need to plan the best DEN to USM flight in 2023: compare Denver to Koh Samui flight prices with the expected peak season, weather and rainfall in Koh Samui.

Popular in


Cheapest in


Average price


Round-trip from

High demand for flights, 22% potential price rise
Best time to find cheap flights, 34% potential price drop
Average for round-trip flights in September 2023
From Denver Intl to Ko Samui



$1,063 - $3,655



80.6 - 84.2 °F



2.3 - 19.3 inches

What is the cheapest month to fly from Denver to Koh Samui?

The best pricing can be found in the month of April. Prices to Koh Samui from Denver average $1,594. You can even find prices in April for less than $1,594, as users have found deals to Koh Samui from as low as $1,032. The month of January appears to be one of the more expensive times to travel to Koh Samui from Denver. Flying in the targeted month can save you up to 28%.

When is the cheapest time to fly from Denver to Koh Samui (DEN - USM)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Denver to Koh Samui as you normally would.

Related info for your journey

Useful info, stats and facts about Denver to Koh Samui flights.

What does DEN to USM mean?

DEN and USM are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. DEN to USM refers to a flight route from Denver Intl Airport to Ko Samui Airport.

Other flights from Denver

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.