Cheap flights from Seattle to Ko Samui from $573
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 Ko Samui departing on 10/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
What is the cheapest day to depart on your flight to Ko Samui?
Our data shows that Tuesday is the least expensive day to fly to Ko Samui. Tickets to fly out on this day can be as low as $275. Flights from Seattle to Ko Samui on a Sunday will generally be more expensive and average around $548. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Ko Samui?
Our data shows that the cheapest Seattle to Ko Samui flights are usually those with departure times in the afternoon. Our users have found flights to Ko Samui in the afternoon for as low as $304. In the evening is when there is more demand to fly to Ko Samui, so prices are often more expensive at around $454 per ticket.
When to book flights from Seattle to Ko Samui
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
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 23h 50m.
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 June 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 Ko Samui?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Seattle to Ko Samui is EVA Air (100% of total bookings).
Best airlines flying from Seattle to Ko Samui
Compare and see reviews for airlines that fly from Seattle to Ko Samui with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $999 | Free Cancellation | Rating 8.4 1,202 reviews |
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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.