Which airports can I use when flying from Denver to Ko Samui?

Flights from Denver to Ko Samui usually depart from Denver Intl (DEN) and arrive at Ko Samui (USM).

What cabin classes can I book on flights from Denver to Ko Samui?

Only Economy Class is available on flights from Denver to Ko Samui.

Can I save money by using flexible dates for flights from Denver to Ko Samui?

Yes. Being flexible with your travel dates can save you up to 30% on the Denver to Ko Samui route. Friday is the cheapest departure day at $1,764 round-trip on average, while Wednesday is the most expensive at $2,505, a difference of $741. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in Ko Samui?

Some of the most popular sights in Ko Samui are Lamai Beach, Chaweng Beach and Fishermans Village. These are among the most viewed places in Ko Samui on KAYAK.

Do I need a passport to fly from Denver to Ko Samui?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Have flight prices from Denver to Ko Samui changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,221 to $4,167. That means the highest observed fare was about 3x higher than the lowest one.

What is the time difference between Denver and Ko Samui?

Ko Samui is 13 hours ahead of Denver (Indochina Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at Ko Samui Airport (USM)?

Ko Samui Airport (USM) hosts 5 major car rental companies, with daily rates starting from around $14 for economy cars. Top options include: • Drive Car Rental • Alamo • Sixt • Enterprise Rent-A-Car • Hertz

$1,221 CHEAP FLIGHTS from Denver to Ko Samui (DEN - USM)

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Cheapest round-trip

$1,221

Typical prices: $1,764-$2,167

Multiple Airlines

Tue 10/30Thu 11/15

DEN - USM • 2 stops

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Flight Deals

Cheap Flights from Denver to Ko Samui (DEN-USM)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Recent round-trip flight deals from Denver to Ko Samui

Fri, Oct 30 - Sun, Nov 15

3:53 pm - 11:30 amDEN Denver Intl-USM Ko Samui

30h 37m2 stops Vancouver Intl Bangkok Suvarnabhumi

9:10 pm - 12:43 pmUSM Ko Samui-DEN Denver Intl

29h 33m2 stops Bangkok Suvarnabhumi Vancouver Intl

$1,221Multiple Airlines

Fri, Oct 30 - Sun, Nov 15

7:00 pm - 10:35 amDEN Denver Intl-USM Ko Samui

26h 35m2 stops Vancouver Intl Bangkok Suvarnabhumi

7:10 pm - 12:43 pmUSM Ko Samui-DEN Denver Intl

31h 33m2 stops Bangkok Suvarnabhumi Vancouver Intl

$1,221Multiple Airlines

Sat, Mar 13 - Sat, Mar 20

7:00 pm - 10:35 amDEN Denver Intl-USM Ko Samui

25h 35m2 stops Vancouver Intl Bangkok Suvarnabhumi

6:30 pm - 12:35 pmUSM Ko Samui-DEN Denver Intl

31h 05m2 stops Bangkok Suvarnabhumi Vancouver Intl

$1,370Multiple Airlines

Thu, Oct 1 - Sat, Oct 17

6:11 pm - 7:40 pmDEN Denver Intl-USM Ko Samui

60h 29m2 stops Los Angeles Hong Kong Intl

11:55 am - 11:21 amUSM Ko Samui-DEN Denver Intl

60h 26m2 stops Hong Kong Intl Los Angeles

$1,424Cathay Pacific

Thu, Oct 1 - Sat, Oct 17

6:11 pm - 7:40 pmDEN Denver Intl-USM Ko Samui

60h 29m2 stops Los Angeles Hong Kong Intl

11:55 am - 11:21 amUSM Ko Samui-DEN Denver Intl

60h 26m2 stops Hong Kong Intl Los Angeles

$1,429Cathay Pacific

Thu, Oct 1 - Sat, Oct 17

6:11 pm - 7:40 pmDEN Denver Intl-USM Ko Samui

60h 29m2 stops Los Angeles Hong Kong Intl

11:55 am - 11:21 amUSM Ko Samui-DEN Denver Intl

60h 26m2 stops Hong Kong Intl Los Angeles

$1,476Cathay Pacific

Mon, Nov 16 - Sun, Nov 29

7:30 pm - 6:25 pmDEN Denver Intl-USM Ko Samui

32h 55m2 stops Istanbul Phuket City

7:00 am - 5:25 pmUSM Ko Samui-DEN Denver Intl

48h 25m2 stops Bangkok Suvarnabhumi Istanbul

$1,517Multiple Airlines

Sun, Nov 15 - Sun, Nov 29

6:30 pm - 7:35 pmDEN Denver Intl-USM Ko Samui

35h 05m2 stops Dallas/Fort Worth Hong Kong Intl

7:00 am - 5:25 pmUSM Ko Samui-DEN Denver Intl

48h 25m2 stops Bangkok Suvarnabhumi Istanbul

$1,615Multiple Airlines

Mon, Nov 16 - Sun, Nov 29

6:37 pm - 12:35 pmDEN Denver Intl-USM Ko Samui

27h 58m3 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl Bangkok Suvarnabhumi

4:25 pm - 5:25 pmUSM Ko Samui-DEN Denver Intl

39h 00m2 stops Singapore Changi Istanbul

$1,735Multiple Airlines

Sun, Nov 15 - Sun, Nov 29

6:37 pm - 4:15 pmDEN Denver Intl-USM Ko Samui

31h 38m3 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl Bangkok Suvarnabhumi

4:25 pm - 5:25 pmUSM Ko Samui-DEN Denver Intl

39h 00m2 stops Singapore Changi Istanbul

$1,851Multiple Airlines

Booking Insights

Price, demand and travel trends for Denver to Ko Samui flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Denver to Ko Samui with more confidence.

What is the cheapest airline to fly from Denver to Ko Samui?

Cathay Pacific ($1,424) and Qatar Airways ($2,021) are the cheapest airlines to fly round-trip from Denver to Ko Samui according to KAYAK data over the last 5 days.

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Expert advice

Our travel experts

Stefanie Waldek

Expert on Frontier, Delta and United Airlines

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Daniel Scheffler

Expert on Sun Country Air

Daniel Scheffler is a travel writer, podcaster, and producer. Born in Africa, bred in Europe and now living in America he has traveled to 140 countries (and all 50 U.S. states). Plus he has stayed at over 2500 hotels across the globe. His original shows Everywhere and Without Maps (available on Spotify) showcase his beliefs, travel is about humanity and sharing that beauty. And thus it reminds you that you shouldn’t believe everything you think.

When to book flights from Denver to Ko Samui

Are your dates flexible? Find out the best times to travel from Denver to Ko Samui based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Which airports can I use when flying from Denver to Ko Samui?
Flights from Denver to Ko Samui usually depart from Denver Intl (DEN) and arrive at Ko Samui (USM).
What cabin classes can I book on flights from Denver to Ko Samui?
Only Economy Class is available on flights from Denver to Ko Samui.
Can I save money by using flexible dates for flights from Denver to Ko Samui?
Yes. Being flexible with your travel dates can save you up to 30% on the Denver to Ko Samui route. Friday is the cheapest departure day at $1,764 round-trip on average, while Wednesday is the most expensive at $2,505, a difference of $741. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
What popular places can I visit in Ko Samui?
Some of the most popular sights in Ko Samui are Lamai Beach, Chaweng Beach and Fishermans Village. These are among the most viewed places in Ko Samui on KAYAK.
Do I need a passport to fly from Denver to Ko Samui?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
Have flight prices from Denver to Ko Samui changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,221 to $4,167. That means the highest observed fare was about 3x higher than the lowest one.
What is the time difference between Denver and Ko Samui?
Ko Samui is 13 hours ahead of Denver (Indochina Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.
What car rental options are available at Ko Samui Airport (USM)?
Ko Samui Airport (USM) hosts 5 major car rental companies, with daily rates starting from around $14 for economy cars. Top options include:
• Drive Car Rental
• Alamo
• Sixt
• Enterprise Rent-A-Car
• Hertz

If your dates can be flexible, aim for a Friday departure instead of Wednesday. On this route, Friday flights average $1,764 - about $741 less than Wednesday (30% savings) based on the last 12 months.
If you're arriving late at night and need somewhere to stay, check out these hotels close to Ko Samui Airport.
- Ozo Chaweng Samui - Sha Extra Plus
- Amari Koh Samui
- Cosi Samui Chaweng Beach

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DEN - USM

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Everything you should know

Cheap Flights from Denver to Ko Samui (DEN-USM)

Recent round-trip flight deals from Denver to Ko Samui

Recent one-way flight deals from Denver to Ko Samui

Price, demand and travel trends for Denver to Ko Samui flights

What is the cheapest airline to fly from Denver to Ko Samui?

Expert advice for your flight from Denver to Ko Samui

When to book flights from Denver to Ko Samui

Your Denver to Ko Samui flight questions, answered

Your guide to booking Denver to Ko Samui flights

More options for your flight from Denver to Ko Samui

Complete your trip to Ko Samui with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from Denver to Ko Samui

Find direct flights to and from Denver and Ko Samui

Flights from domestic origins to Ko Samui

Flights to other popular destinations