How does KAYAK find such low prices on flights from Washington to Ko Samui?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Ko Samui. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Ko Samui?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ko Samui from Washington is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Washington to Ko Samui?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ko Samui with an airline and back to Washington with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Ko Samui?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ko Samui from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$620 CHEAP FLIGHTS from Washington to Ko Samui

USM

KAYAK searches hundreds of travel sites at once for deals on flights to Ko Samui

...and more

Travelers love KAYAK

41,299,237 searches in the past 7 days on KAYAK

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Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$1,008

EVA Air

Mon 1/26Tue 2/3

SEA - USM • 2 stops

Cheapest one-way

$620

Multiple Airlines

Tue 6/2

SEA - USM • 3 stops

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Ko Samui!

Flight Deals

Cheap Flights from Washington to Ko Samui

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington to Ko Samui that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

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

Round-trip

One-way

Recent round-trip flight deals from Washington to Ko Samui

Mon, Jan 26 - Tue, Feb 3

12:10 am - 5:40 pm

SEA

USM

26h 30m2 stops

2:05 pm - 6:10 pm

USM

SEA

19h 05m2 stops

$1,008EVA Air

Sat, May 2 - Thu, May 7

12:50 am - 2:45 pm

SEA

USM

23h 55m2 stops

11:45 am - 6:50 pm

USM

SEA

21h 05m2 stops

$1,043EVA Air

Mon, Jan 26 - Tue, Feb 3

12:10 am - 5:50 pm

SEA

USM

26h 40m2 stops

1:45 pm - 5:30 pm

USM

SEA

18h 45m2 stops

$1,049EVA Air

Sat, Feb 14 - Tue, Feb 24

12:10 am - 3:40 pm

SEA

USM

24h 30m2 stops

2:05 pm - 5:30 pm

USM

SEA

18h 25m2 stops

$1,088EVA Air

Sun, May 3 - Thu, May 7

10:15 am - 7:50 am

SEA

USM

31h 35m1 stop

7:45 pm - 8:45 am

USM

SEA

27h 00m1 stop

$1,104Singapore Airlines

Tue, Jan 27 - Tue, Feb 3

8:45 am - 8:00 am

SEA

USM

32h 15m1 stop

8:30 pm - 9:15 am

USM

SEA

27h 45m2 stops

$1,139Multiple Airlines

Tue, Jan 27 - Tue, Feb 3

8:45 am - 8:00 am

SEA

USM

32h 15m1 stop

7:35 pm - 9:15 am

USM

SEA

28h 40m2 stops

$1,169Multiple Airlines

Tue, Jan 27 - Tue, Feb 3

5:50 am - 7:45 am

SEA

USM

34h 55m3 stops

6:40 pm - 9:15 am

USM

SEA

29h 35m2 stops

$1,186Multiple Airlines

Sun, Feb 15 - Tue, Feb 24

8:45 am - 8:00 am

SEA

USM

32h 15m1 stop

6:05 pm - 7:10 am

USM

SEA

52h 05m1 stop

$1,258Singapore Airlines

Thu, Jan 22 - Tue, Jan 27

9:30 pm - 7:35 pm

PDX

USM

55h 05m2 stops

11:40 am - 1:41 pm

USM

PDX

41h 01m2 stops

$1,390Cathay Pacific

Useful Info

Cheapest flight	$620

Flight from Seattle to Ko Samui

How does KAYAK find such low prices on flights from Washington to Ko Samui?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Ko Samui.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Ko Samui?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ko Samui from Washington is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Washington to Ko Samui?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ko Samui with an airline and back to Washington with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Ko Samui?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ko Samui from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight to Ko Samui

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Information on the airport you'll fly into in Ko Samui

Ko Samui (USM)

USM

$620 Find Cheap Flights from Washington to Ko Samui

KAYAK searches hundreds of travel sites at once for deals on flights to Ko Samui

Everything you should know

Cheap Flights from Washington to Ko Samui

Recent round-trip flight deals from Washington to Ko Samui

Recent one-way flight deals from Washington to Ko Samui

Good to know

FAQs for booking flights from Washington to Ko Samui

How does KAYAK find such low prices on flights from Washington to Ko Samui?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Ko Samui.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Ko Samui?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ko Samui from Washington is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Washington to Ko Samui?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ko Samui with an airline and back to Washington with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Ko Samui?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ko Samui from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight to Ko Samui

Information on the airport you'll fly into in Ko Samui

Cabin class types available on flights to Washington

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

Find direct flights for Ko Samui

Flights to other popular destinations

Flights from domestic origins to Ko Samui

Choose which airport to fly into in Ko Samui