Cheap flights from Seattle to Koh Samui from $647
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Koh Samui departing on 3/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Seattle to Koh Samui
Cheap round-trip flights
Cheap one-way flights
EVA Air flights from Seattle to Koh Samui
Our best EVA Air deals on Seattle to Koh Samui flight tickets
Qatar Airways flights from Seattle to Koh Samui
Our best Qatar Airways deals on Seattle to Koh Samui flight tickets
See travel insights to Koh Samui from
How to get the cheapest flight ticket from Seattle to Koh 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
What is the cheapest day to depart on your flight to Koh Samui?
According to our data, Tuesday is the cheapest day to fly to Koh Samui from Seattle. The lowest ticket price found for a Tuesday departure recently was $282. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Monday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $546.
What is the cheapest time of day to depart on your flight to Koh Samui?
According to our data, the cheapest time of day to fly to Koh Samui is in the afternoon. momondo users have found flights departing from Seattle to Koh Samui in the afternoon for as low as $306. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets in the evening because they tend to be around $461. Of course, these prices can vary depending on the time of year and what airport you fly to.
When to book flights from Seattle to Koh Samui
Cheap Seattle to Koh Samui (SEA to USM) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Koh 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 20h 55m.
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 many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Ko Samui Airport?
As of February 2025, there is 1 operator available to choose from for flights from Seattle/Tacoma Intl Airport to Ko Samui Airport.
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.
What is the most popular airline from Seattle to Koh Samui?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Seattle to Koh Samui is EVA Air (100% of total bookings).
Best airlines flying from Seattle to Koh Samui
Compare and see reviews for airlines that fly from Seattle to Koh Samui with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $1,057 | Free Cancellation | Rating 8.4 1,198 reviews |
Traveling to a place near Koh Samui?
Book flights to Koh Samui if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Seattle to Koh Samui?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Koh Samui. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Seattle to Koh Samui with flexible booking policies on momondo?
momondo does allow users to show only those flights to Koh 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 Koh 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 Koh Samui.
I’m not ready to book a flight from Seattle to Koh Samui right now. Can momondo alert me if prices change?
Price alerts on flights to Koh 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.