Cheap flights from Seattle (SEA) to Koh Samui (USM)

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How to find the cheapest flight from
Seattle (SEA) to Koh Samui (USM)

All the information you need to plan the best SEA to USM flight in 2022: compare Seattle to Koh Samui flight prices with the expected peak season, weather and rainfall in Koh Samui.
When is the cheapest time to fly from Seattle to Koh Samui (SEA - USM)?

When flying from Seattle to Koh Samui, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 28% versus a flight at noon.

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

Our data shows that February tends to be the cheapest month to fly to Koh Samui from Seattle. Users have commonly found prices around $1,051 for the month, but tickets can be as low as $793. Due to multiple factors, prepare for potentially higher prices in October.

What is the cheapest day to fly round-trip from Seattle to Koh Samui?

Departing on a Thursday is a good option for securing a great price. You can expect to save up to 26% when planning your travel around this day of the week.

Cheap flights from Seattle to Koh Samui in July, August 2022

The best prices found for SEA to USM flights for July, August
2 Aug - 17 Aug
$1,948pp
SEA
Seattle/Tacoma Intl
EVA Air
   
2 STOPS
USM
Ko Samui
USM
Ko Samui
EVA Air
   
2 STOPS
SEA
Seattle/Tacoma Intl
3 Aug - 17 Aug
$2,205pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
     
3 STOPS
USM
Ko Samui
USM
Ko Samui
Multiple Airlines
     
3 STOPS
SEA
Seattle/Tacoma Intl
3 Aug - 17 Aug
$2,508pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
     
3 STOPS
USM
Ko Samui
USM
Ko Samui
Emirates
   
2 STOPS
SEA
Seattle/Tacoma Intl

Seattle/Tacoma Intl to Koh Samui 2022 flight deals

Cheap flights to Koh Samui from Seattle found for this year
9 Nov - 9 Feb
$1,175pp
SEA
Seattle/Tacoma Intl
EVA Air
   
2 STOPS
USM
Ko Samui
USM
Ko Samui
EVA Air
   
2 STOPS
SEA
Seattle/Tacoma Intl
9 Nov - 9 Feb
$1,176pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
USM
Ko Samui
USM
Ko Samui
EVA Air
   
2 STOPS
SEA
Seattle/Tacoma Intl
10 Nov - 9 Feb
$1,188pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
USM
Ko Samui
USM
Ko Samui
Multiple Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl

Cheap Japan Airlines flights from Seattle to Koh Samui

10 Nov - 9 Feb
$1,206pp
SEA
Seattle/Tacoma Intl
Japan Airlines
   
2 STOPS
USM
Ko Samui
USM
Ko Samui
Japan Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
31 Dec - 14 Jan
$1,266pp
SEA
Seattle/Tacoma Intl
Japan Airlines
   
2 STOPS
USM
Ko Samui
USM
Ko Samui
Japan Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
18 Nov - 24 Nov
$1,318pp
SEA
Seattle/Tacoma Intl
Japan Airlines
     
3 STOPS
USM
Ko Samui
USM
Ko Samui
Japan Airlines
     
3 STOPS
SEA
Seattle/Tacoma Intl

Cheap Qatar Airways flights from Seattle to Koh Samui

3 Aug - 17 Aug
$2,901pp
SEA
Seattle/Tacoma Intl
Qatar Airways
   
2 STOPS
USM
Ko Samui
USM
Ko Samui
Qatar Airways
   
2 STOPS
SEA
Seattle/Tacoma Intl

One-way flights to Ko Samui from Seattle

The cheapest one-way flights from Seattle to Koh Samui
6:20 am - 2:50 pm
Multiple Airlines
2 Stops
42h 30m
SEA - USM
Multiple Airlines
$591
Kiwi.com
9:00 am - 2:50 pm
Multiple Airlines
3 Stops
39h 50m
SEA - USM
Multiple Airlines
$692
Kiwi.com
5:30 am - 9:45 am
Multiple Airlines
4 Stops
38h 15m
SEA - USM
Multiple Airlines
$1,394
Jetabroad

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Seattle</span> to <span class="emphasized">Koh Samui</span> flights.

Flight FAQs

From Seattle to Koh Samui

Which airlines flying from Seattle/Tacoma Intl to Ko Samui have flexible cancellations due to COVID-19?

Some of the carriers operating flights from Seattle/Tacoma Intl to Ko Samui that may be offering flexible cancellation policies are Singapore Airlines, Cathay Pacific, and Japan Airlines. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

Can I find flights from Seattle to Koh Samui for under $1,200 on Cheapflights?

Yes, there are multiple flights from Seattle to Koh Samui for under $1,200. The cheapest flight booked recently is on EVA Air for just $1,175, but on average you can expect to pay $1,355.

What are the cheapest airlines flying from Seattle to Koh Samui round-trip?

According to our current data, EVA Air ($1,175), and Japan Airlines ($1,206) offers the cheapest pricing from Seattle to Koh Samui.

What are the cheapest flights from Seattle to Koh Samui?

On average you can expect to pay $1,145 for a flight from Seattle to Koh Samui. The cheapest flight overall is $1,071 while the most popular route, (Seattle/Tacoma Intl - Ko Samui) is currently priced at $1,188.

What are the most popular airlines that fly from Seattle to Koh Samui?

When booking a flight from Seattle to Koh Samui, you may want to consider flying on EVA Air, Cathay Pacific or Japan Airlines as they are the most popular for this route.

COVID Restrictions

View COVID Travel Restrictions for Koh Samui, Thailand

Do I need a COVID test to fly to Koh Samui from Seattle?

Information is based on travel restrictions from Seattle/Tacoma Intl to Ko Samui

Most visitors from Seattle/Tacoma Intl can enter Ko Samui without restrictions.

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl are not required to present a negative COVID-19 PCR test or antigen result upon entering Ko Samui.

Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering Ko Samui.

Do I need a test to fly back to Seattle from Koh Samui?

Returning to Seattle/Tacoma Intl from Ko Samui

COVID-19 testing requirements
Visitors from Ko Samui are not required to present a negative COVID-19 PCR test or antigen result upon entering Seattle/Tacoma Intl.

Quarantine requirements
Visitors from Ko Samui are not required to quarantine after entering Seattle/Tacoma Intl.

Hide COVID Travel Restrictions for Koh Samui, Thailand

Top 3 airlines flying from Seattle/Tacoma Intl to Ko Samui

The chart below displays the airlines Cheapflights users traveling from Seattle to Koh Samui choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Japan Airlines
$734 $890 No cancel fee 79%

We couldn't confirm the COVID-19 safety measures taken by Japan Airlines. Please check directly on their website for additional information.

Singapore Airlines
$859 $1,138 No cancel fee 81%
Cathay Pacific
$1,114 $1,493 No cancel fee 72%
Home Asia Thailand Koh Samui Cheap flights from Seattle to Koh Samui