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$934 Find cheap flights from Washington to Koh Samui

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Koh Samui departing on 7/11. 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 7/11
Thu 7/18

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Cheapest flight

$934
Flight from Seattle to Koh Samui

FAQs for booking flights from Washington to Koh Samui

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Koh Samui from Washington 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 Washington 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 Washington with another airline.

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

See more FAQs

Prefer to fly non-stop from Washington to Koh Samui?

Find which airlines fly direct from Washington to Ko Samui, which days they fly and book direct flights.

Nonstop departures

Washington to Ko Samui

Monday

Air Astana, Air France, Austrian Airlines, +26 more

Air Astana, Air France, +27 more

Tuesday

Air Astana, Air France, Austrian Airlines, +26 more

Air Astana, Air France, +27 more

Wednesday

Air Astana, Air France, Austrian Airlines, +26 more

Air Astana, Air France, +27 more

Thursday

Air Astana, Air France, Austrian Airlines, +26 more

Air Astana, Air France, +27 more

Friday

Air Astana, Air France, Austrian Airlines, +26 more

Air Astana, Air France, +27 more

Saturday

Air Astana, Air France, Austrian Airlines, +26 more

Air Astana, Air France, +27 more

Sunday

Air Astana, Air France, Austrian Airlines, +26 more

Air Astana, Air France, +27 more

See more direct flights

Nonstop returns

Ko Samui to Washington

Monday

Air Astana, Air France, Austrian Airlines, +26 more

Air Astana, Air France, +27 more

Tuesday

Air Astana, Air France, Austrian Airlines, +26 more

Air Astana, Air France, +27 more

Wednesday

Air Astana, Air France, Austrian Airlines, +26 more

Air Astana, Air France, +27 more

Thursday

Air Astana, Air France, Austrian Airlines, +26 more

Air Astana, Air France, +27 more

Friday

Air Astana, Air France, Austrian Airlines, +26 more

Air Astana, Air France, +27 more

Saturday

Air Astana, Air France, Austrian Airlines, +26 more

Air Astana, Air France, +27 more

Sunday

Air Astana, Air France, Austrian Airlines, +26 more

Air Astana, Air France, +27 more

See more direct flights
See more direct flights

Book cheap flights from Washington to Koh Samui

Recent round-trip flight deals

7/17Wed
2 stops
33h 20mSEA-USM
7/31Wed
2 stops
62h 20mUSM-SEA
$1,771
7/16Tue
2 stops
23h 00mSEA-USM
7/31Wed
2 stops
24h 35mUSM-SEA
$1,797
8/3Sat
2 stops
25h 25mSEA-USM
8/10Sat
2 stops
24h 35mUSM-SEA
$1,856
7/17Wed
3 stops
27h 40mSEA-USM
7/31Wed
3 stops
33h 05mUSM-SEA
$1,865
8/4Sun
2 stops
27h 55mSEA-USM
8/10Sat
2 stops
29h 35mUSM-SEA
$1,887
8/4Sun
1 stop
31h 50mSEA-USM
8/10Sat
2 stops
24h 35mUSM-SEA
$2,121
7/17Wed
2 stopsSingapore Airlines
33h 08mSEA-USM
7/31Wed
1 stopSingapore Airlines
37h 45mUSM-SEA
$3,079
8/4Sun
1 stopSingapore Airlines
31h 50mSEA-USM
8/10Sat
1 stopSingapore Airlines
37h 45mUSM-SEA
$4,516
8/24Sat
2 stopsQatar Airways
33h 15mSEA-USM
9/1Sun
2 stopsQatar Airways
43h 30mUSM-SEA
$5,357
8/24Sat
2 stopsJapan Airlines
30h 40mSEA-USM
9/1Sun
3 stopsJapan Airlines
35h 50mUSM-SEA
$6,525

Search by stops

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Recent one-way flight deals

7/11Thu
1 stopSingapore Airlines
55h 50mSEA-USM
$934
7/11Thu
2 stops
33h 15mSEA-USM
$1,021
7/11Thu
2 stopsTurkish Airlines
36h 35mSEA-USM
$1,048
7/11Thu
3 stopsJapan Airlines
46h 00mSEA-USM
$1,058
7/10Wed
2 stopsEVA Air
25h 35mSEA-USM
$1,108
10/7Mon
3 stopsJapan Airlines
33h 55mPDX-USM
$3,247
10/7Mon
2 stopsCathay Pacific
31h 50mPDX-USM
$3,978

Search by stops

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Flights to Koh Samui

Destination:

Koh Samui (USM)Thailand

Cabin classes:

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