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Find cheap flights from Seattle to Koh Samui from $812

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Koh Samui departing on 7/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Thu 5/23
Thu 5/30

Search hundreds of travel sites at once for deals on flights to Koh Samui

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Koh Samui, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Koh Samui, as well as popular online travel agencies
In the last 7 days travelers have searched 44,632,927 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

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

Bundle and saveSave money when you bundle your flight + hotel.

Good to know

Low season

November

High season

July

Cheapest flight

$812
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 46% increase in price.
Flight from Seattle to Koh Samui

When to book flights from Seattle to Koh Samui

Are your dates flexible? Find out the best times to travel from Seattle to Koh Samui based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Koh Samui

  • What is the cheapest flight from Seattle to Koh Samui?

    In the last 3 days, the lowest price for a flight from Seattle to Koh Samui was $812 for a one-way ticket.

  • Do I need a passport to fly between Seattle and Koh Samui?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Seattle and on arrival in Koh Samui.

  • Which aircraft models fly most regularly from Seattle to Koh Samui?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Koh Samui?

    Star Alliance, and oneworld are the airline alliances operating flights between Seattle and Koh Samui, with Star Alliance being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Seattle to Koh 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 Seattle to Koh Samui.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Koh Samui from Seattle 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 Seattle to Koh 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 Koh Samui with an airline and back to Seattle with another airline. Booking your flights between Seattle and USM can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Koh 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 Koh Samui from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airline flying from Seattle to Koh Samui

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Koh Samui. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Koh Samui? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.3
EVA AirOverall score based on 1557 reviews
8.2comfort
8.4boarding
8.0entertainment
8.6crew
7.9food
Airline reviews

Fast and efficient boarding. Flight was on time. Service was very good for our long flight. First time flying with this airline and I would highly recommend.

10.0 ExcellentDamian, Mar 2024LAX - TPE
Read more about EVA Air reviews

Fast and efficient boarding. Flight was on time. Service was very good for our long flight. First time flying with this airline and I would highly recommend.

Eva Air's Business Class is pretty decent. With the given price, I think that the food can be better.

Pleasant, comfortable, and entertaining. All told, ZERO issues with it. And sadly, so far the flight was WAY more comfortable than the hellhole that is "Lambug Beach Resort" at Badian Beach!

It was a pleasant fly with Eva Air from NYC to Taipei. The crew were friendly and the food was exceeded my expectation.

Eva air is a good airline. The seats on the way to Taipei could have certainly been more comfortable, but all in all it was a pretty good experience.

Boarding is fast and easy for economy class, food was ok baggage policies are good

Overall the flight was what might be expected for a long haul flight to Asia in economy class. The cabin crew was attentive and the food was good. Boarding was fairly fast and easy. The one thing I found frustrating was the EVA app. It is terrible. Trying to do anything on it was almost impossible.

EVA would not help with ticket issue since they were purchased through a travel agency. Even though it was EVA ticket stock. Travel agency Budget Air didn't reissue ticket after airline change which I didn’t learn until trying to checkin on Christmas Day and there was no contact number for the agency to help. I will never use Budget Air to purchase flight again and disappointed in EVA’s refusal to help. Thankfully just under 12 hrs before departure someone from the agency was available to reissue tickets. I was starting to think we would not be flying and the stress trying to resolve was completely unacceptable.

seamless check in/ friendly staff, food is good, always love flying Eva Air

Very uncomfortable and crowded seats in economy. Flight attendant refused request to move to nearby unused seat with more legroom because “It was more money for that seat”. It was also near impossible to reach airline directly by phone. Waits upwards of an hour and not very helpful customer service representatives after long wait. Cannot recommend this airline.

Book cheap flights from Seattle to Koh Samui

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Seattle to Koh Samui found on KAYAK in the last 72 hours.
7/10Wed
2 stopsEVA Air
22h 35mSEA-USM
$812
7/9Tue
2 stopsEVA Air
26h 20mSEA-USM
$826
7/12Fri
3 stops
48h 20mSEA-USM
$850
7/10Wed
2 stops
39h 10mSEA-USM
$928
7/8Mon
2 stopsEVA Air
22h 35mSEA-USM
$1,080
7/13Sat
1 stopSingapore Airlines
35h 00mSEA-USM
$1,104
7/13Sat
3 stops
29h 15mSEA-USM
$1,161
7/14Sun
1 stopSingapore Airlines
31h 50mSEA-USM
$1,177
7/11Thu
3 stops
29h 05mSEA-USM
$1,242
7/12Fri
2 stopsQatar Airways
28h 00mSEA-USM
$1,262

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Seattle - Koh Samui Flights

Departure:

Seattle (SEA)United States

Destination:

Koh Samui (USM)Thailand

Cabin classes:

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