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Cheap flights from Seattle to Ko Samui from $491

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Seattle to Ko Samui

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:25 am - 6:55 amSEA  Seattle/Tacoma Intl-USM Ko Samui
53h 30m2 stops Hong Kong Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
2:05 pm - 8:45 amUSM  Ko Samui-SEA Seattle/Tacoma Intl
33h 40m2 stops Bangkok Suvarnabhumi Hong Kong Intl
$958Multiple Airlines
Thu, Jan 28 - Tue, Feb 16
Singapore Airlines Logo
8:40 am - 6:55 pmSEA  Seattle/Tacoma Intl-USM Ko Samui
43h 15m1 stop Singapore Changi
Singapore Airlines Logo
8:55 am - 7:05 amUSM  Ko Samui-SEA Seattle/Tacoma Intl
61h 10m1 stop Singapore Changi
$959Singapore Airlines
Tue, Feb 9 - Sun, Feb 28
Multiple Airlines Logo
10:25 am - 7:35 amSEA  Seattle/Tacoma Intl-USM Ko Samui
30h 10m2 stops Hong Kong Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
9:30 pm - 8:45 amUSM  Ko Samui-SEA Seattle/Tacoma Intl
26h 15m2 stops Bangkok Suvarnabhumi Hong Kong Intl
$989Multiple Airlines
Mon, Mar 1 - Tue, Mar 9
Multiple Airlines Logo
10:25 am - 6:55 amSEA  Seattle/Tacoma Intl-USM Ko Samui
29h 30m2 stops Hong Kong Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
4:30 pm - 8:45 amUSM  Ko Samui-SEA Seattle/Tacoma Intl
31h 15m2 stops Bangkok Suvarnabhumi Hong Kong Intl
$990Multiple Airlines
Tue, Feb 9 - Sun, Feb 28
Cathay Pacific Logo
8:00 am - 7:40 pmSEA  Seattle/Tacoma Intl-USM Ko Samui
45h 40m2 stops Los Angeles Hong Kong Intl
Cathay Pacific Logo
11:55 am - 10:05 amUSM  Ko Samui-SEA Seattle/Tacoma Intl
36h 10m1 stop Hong Kong Intl
$994Cathay Pacific
Sun, Mar 28 - Sun, Apr 11
Multiple Airlines Logo
11:45 am - 12:45 pmSEA  Seattle/Tacoma Intl-USM Ko Samui
35h 00m2 stops Hong Kong Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
11:55 am - 7:12 amUSM  Ko Samui-SEA Seattle/Tacoma Intl
33h 17m2 stops Hong Kong Intl Vancouver Intl
$1,001Multiple Airlines
Thu, Apr 1 - Sat, Apr 10
Multiple Airlines Logo
10:25 am - 6:55 amSEA  Seattle/Tacoma Intl-USM Ko Samui
53h 30m2 stops Hong Kong Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
2:05 pm - 8:45 amUSM  Ko Samui-SEA Seattle/Tacoma Intl
33h 40m2 stops Bangkok Suvarnabhumi Hong Kong Intl
$1,005Multiple Airlines
Wed, Jan 27 - Wed, Feb 24
Multiple Airlines Logo
10:25 am - 6:55 amSEA  Seattle/Tacoma Intl-USM Ko Samui
53h 30m2 stops Hong Kong Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
4:30 pm - 8:45 amUSM  Ko Samui-SEA Seattle/Tacoma Intl
31h 15m2 stops Bangkok Suvarnabhumi Hong Kong Intl
$1,005Multiple Airlines
Thu, Jan 21 - Wed, Jan 27
Multiple Airlines Logo
10:25 am - 7:10 amSEA  Seattle/Tacoma Intl-USM Ko Samui
29h 45m2 stops Hong Kong Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
7:10 pm - 8:45 amUSM  Ko Samui-SEA Seattle/Tacoma Intl
52h 35m2 stops Bangkok Suvarnabhumi Hong Kong Intl
$1,021Multiple Airlines
Mon, Mar 1 - Tue, Mar 9
Singapore Airlines Logo
10:15 am - 6:50 pmSEA  Seattle/Tacoma Intl-USM Ko Samui
42h 35m1 stop Singapore Changi
Singapore Airlines Logo
8:40 am - 8:45 amUSM  Ko Samui-SEA Seattle/Tacoma Intl
38h 05m1 stop Singapore Changi
$1,023Singapore Airlines
Sun, Mar 28 - Mon, Apr 5

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Singapore Airlines flights from Seattle to Ko Samui

Our best Singapore Airlines deals on Seattle to Ko Samui flight tickets
Singapore Airlines
Nov 4
SEA8:40 amSeattle/Tacoma Intl
65h 30m
1 stop
USM5:10 pmKo Samui
Nov 16
USM6:05 pmKo Samui
52h 00m
1 stop
SEA7:05 amSeattle/Tacoma Intl
$863
Singapore Airlines
Nov 4
SEA8:40 amSeattle/Tacoma Intl
41h 30m
1 stop
USM5:10 pmKo Samui
Nov 16
USM6:05 pmKo Samui
52h 00m
1 stop
SEA7:05 amSeattle/Tacoma Intl
$914
Singapore Airlines
Feb 9
SEA8:40 amSeattle/Tacoma Intl
43h 15m
1 stop
USM6:55 pmKo Samui
Feb 28
USM8:55 amKo Samui
61h 10m
1 stop
SEA7:05 amSeattle/Tacoma Intl
$959

EVA Air flights from Seattle to Ko Samui

Our best EVA Air deals on Seattle to Ko Samui flight tickets
EVA Air
Jan 26
SEA12:10 amSeattle/Tacoma Intl
23h 45m
2 stops
USM2:55 pmKo Samui
Feb 16
USM2:05 pmKo Samui
19h 05m
2 stops
SEA6:10 pmSeattle/Tacoma Intl
$1,207
EVA Air
Jan 28
SEA11:30 pmSeattle/Tacoma Intl
25h 05m
2 stops
USM3:35 pmKo Samui
Feb 17
USM2:05 pmKo Samui
19h 05m
2 stops
SEA6:10 pmSeattle/Tacoma Intl
$1,208
EVA Air
Nov 3
SEA12:10 amSeattle/Tacoma Intl
24h 25m
2 stops
USM3:35 pmKo Samui
Nov 5
USM9:10 pmKo Samui
36h 00m
2 stops
SEA6:10 pmSeattle/Tacoma Intl
$1,267

momondo Fare Finder

 
Use the filters below to find and compare flights from Seattle to Ko Samui that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleKo Samui

SEA Seattle/Tacoma Intl - USM Ko Samui

SEAUSM

Seattle/Tacoma Intl

Thu 1/28

10:25 am-6:55 am

2 stops53h 30m

Ko Samui

Tue 2/16

2:05 pm-8:45 am

2 stops33h 40m

$958

SeattleKo Samui

SEA Seattle/Tacoma Intl - USM Ko Samui

SEAUSM

Seattle/Tacoma Intl

Tue 2/9

8:40 am-6:55 pm

1 stop43h 15m

Ko Samui

Sun 2/28

8:55 am-7:05 am

1 stop61h 10m

$959
Quickest round-trip

SeattleKo Samui

SEA Seattle/Tacoma Intl - USM Ko Samui

SEAUSM

Seattle/Tacoma Intl

Mon 3/1

10:25 am-7:35 am

2 stops30h 10m

Ko Samui

Tue 3/9

9:30 pm-8:45 am

2 stops26h 15m

$989

SeattleKo Samui

SEA Seattle/Tacoma Intl - USM Ko Samui

SEAUSM

Seattle/Tacoma Intl

Tue 2/9

10:25 am-6:55 am

2 stops29h 30m

Ko Samui

Sun 2/28

4:30 pm-8:45 am

2 stops31h 15m

$990

SeattleKo Samui

SEA Seattle/Tacoma Intl - USM Ko Samui

SEAUSM

Seattle/Tacoma Intl

Sun 3/28

8:00 am-7:40 pm

2 stops45h 40m

Ko Samui

Sun 4/11

11:55 am-10:05 am

1 stop36h 10m

$994

SeattleKo Samui

SEA Seattle/Tacoma Intl - USM Ko Samui

SEAUSM

Seattle/Tacoma Intl

Thu 4/1

11:45 am-12:45 pm

2 stops35h 00m

Ko Samui

Sat 4/10

11:55 am-7:12 am

2 stops33h 17m

$1,001

SeattleKo Samui

SEA Seattle/Tacoma Intl - USM Ko Samui

SEAUSM

Seattle/Tacoma Intl

Wed 1/27

10:25 am-6:55 am

2 stops53h 30m

Ko Samui

Wed 2/24

2:05 pm-8:45 am

2 stops33h 40m

$1,005

SeattleKo Samui

SEA Seattle/Tacoma Intl - USM Ko Samui

SEAUSM

Seattle/Tacoma Intl

Thu 1/21

10:25 am-6:55 am

2 stops53h 30m

Ko Samui

Wed 1/27

4:30 pm-8:45 am

2 stops31h 15m

$1,005

SeattleKo Samui

SEA Seattle/Tacoma Intl - USM Ko Samui

SEAUSM

Seattle/Tacoma Intl

Mon 3/1

10:25 am-7:10 am

2 stops29h 45m

Ko Samui

Tue 3/9

7:10 pm-8:45 am

2 stops52h 35m

$1,021

SeattleKo Samui

SEA Seattle/Tacoma Intl - USM Ko Samui

SEAUSM

Seattle/Tacoma Intl

Sun 3/28

10:15 am-6:50 pm

1 stop42h 35m

Ko Samui

Mon 4/5

8:40 am-8:45 am

1 stop38h 05m

$1,023

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Ko Samui from

How to get the cheapest flight ticket from Seattle to Ko Samui

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Can stopping save me money on Seattle to Ko Samui flights?

You could potentially save up to 26% on your flight if you consider stops on a Seattle to Ko Samui flight.

When to book flights from Seattle to Ko Samui

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Ko Samui according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Ko Samui (SEA to USM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Ko Samui

Best Price Found

$491

Fastest flight time

24h 25m

Direct flights

None
The best one-way flight to Ko Samui from Seattle in the past 72 hours is $491. The best round-trip flight deal from Seattle to Ko Samui found on momondo in the last 72 hours is $958.
The fastest flight from Seattle to Ko Samui takes 24h 25m
There are no direct flights from Seattle to Ko Samui. There are no popular flight routes from Seattle to Ko Samui.
Search flight deals

Frequently asked questions about flying from Seattle to Ko Samui

  • How far is Seattle/Tacoma Intl to Ko Samui by plane?

    The distance between Seattle/Tacoma Intl and Ko Samui is about 7708.5 mi. A reasonable flight in good conditions will take 24h 25m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Ko Samui Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Ko Samui Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Ko Samui Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Ko Samui Airport.

  • What documentation or ID do you need to fly to Ko Samui Airport?

    The required travel and health documents for your Ko Samui Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ko Samui Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near Ko Samui?

Book flights to Ko Samui if you plan to visit one of these locations
Ko Pha Ngan
Ko Tao
Khanom

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Ko Samui?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Ko Samui. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Seattle to Ko Samui with flexible booking policies on momondo?

momondo does allow users to show only those flights to Ko Samui from Seattle which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Seattle to Ko Samui?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Ko Samui.

I’m not ready to book a flight from Seattle to Ko Samui right now. Can momondo alert me if prices change?

Price alerts on flights to Ko Samui from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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