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WAS - USM

$1,740 Find cheap flights from Washington, D.C. to Koh Samui

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Koh Samui departing on 7/8. 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
Sat 6/22
Sat 6/29

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 Washington, D.C. 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 Washington, D.C. to Koh Samui, as well as popular online travel agencies
In the last 7 days travelers have searched 43,800,826 times on KAYAK, and here is why:

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Cheap flight deals from Washington, D.C. to Koh Samui (WAS-USM)

 
These are the cheapest deals for flights from Washington, D.C. to Koh Samui currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Washington, D.C. to Koh Samui

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Washington, D.C. to Koh Samui.

Recent one-way flight deals from Washington, D.C. to Koh Samui

Only flying one-way? Below are some of the best one-way flight deals from Washington, D.C. to Koh Samui found on KAYAK recently.

Recent last minute flight deals from Washington, D.C. to Koh Samui

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from Washington, D.C. to Koh Samui.

Recent direct flight deals from Washington, D.C. to Koh Samui

The latest deals for direct flights from Washington, D.C. to Koh Samui so you can sit back and relax without the need for a layover.

Cheap bus & train deals from Washington, D.C. to Koh Samui

Find recent round-trip train or bus tickets from Washington, D.C. to Koh Samui.

All round-trip flight deals to Koh Samui

The cheapest plane tickets to Koh Samui found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
4:40 pm - 9:20 amIAD-USM
29h 40m2 stops
5:55 pm - 2:45 pmUSM-IAD
31h 50m2 stops
$1,740
Find Deal
Mon, Jul 8 - Mon, Jul 15
9:50 pm - 9:15 pmIAD-USM
36h 25m2 stops
1:30 pm - 2:45 pmUSM-IAD
36h 15m2 stops
$1,755Turkish Airlines
Find Deal
Thu, Jun 20 - Sun, Jun 30
2:00 pm - 9:20 amDCA-USM
32h 20m3 stops
9:10 pm - 9:17 amUSM-DCA
47h 07m3 stops
$2,333Qatar Airways
Find Deal
Thu, Jun 20 - Sun, Jun 30
9:55 am - 8:05 amIAD-USM
35h 10m3 stops
7:10 pm - 1:30 pmUSM-IAD
29h 20m2 stops
$2,369
Find Deal
Mon, Jul 8 - Mon, Jul 15
4:00 pm - 8:15 amIAD-USM
29h 15m3 stops
3:20 pm - 2:40 pmUSM-IAD
34h 20m3 stops
$2,459
Find Deal
Thu, Jun 20 - Sun, Jun 30
7:45 pm - 3:45 pmDCA-USM
33h 00m3 stops
9:10 pm - 9:16 amUSM-DCA
47h 06m3 stops
$2,486Qatar Airways
Find Deal
Mon, Jul 8 - Mon, Jul 15
7:45 pm - 6:35 pmDCA-USM
59h 50m2 stops
10:55 am - 10:00 pmUSM-DCA
46h 05m2 stops
$2,497Cathay Pacific
Find Deal
Mon, Jul 8 - Mon, Jul 15
10:55 am - 8:05 amIAD-USM
34h 10m3 stops
1:30 pm - 2:45 pmUSM-IAD
36h 15m2 stops
$2,601
Find Deal
Thu, Jun 20 - Sun, Jun 30
12:29 pm - 6:35 pmDCA-USM
43h 06m2 stops
8:00 am - 4:24 pmUSM-DCA
43h 24m3 stops
$2,680Cathay Pacific
Find Deal
Thu, Jun 20 - Sun, Jun 30
5:43 pm - 9:15 pmIAD-USM
64h 32m3 stops
4:25 pm - 4:35 pmUSM-IAD
59h 10m3 stops
$3,830Singapore Airlines
Find Deal
Mon, Jul 8 - Mon, Jul 15

Good to know

Cheapest flight

$1,740
Flight from Washington Dulles Airport to Koh Samui

When to book flights from Washington, D.C. to Koh Samui

Are your dates flexible? Find out the best times to travel from Washington, D.C. 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 Washington, D.C. to Koh Samui

  • What is the cheapest flight from Washington, D.C. to Koh Samui?

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Koh Samui was $1,740 for a round-trip ticket.

  • Do I need a passport to fly between Washington, D.C. and Koh Samui?

    Yes

  • Which airports will I be using when flying from Washington, D.C. to Koh Samui?

    On your way to Koh Samui, you’ll fly out from one of these Washington, D.C. airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You’ll be landing at Ko Samui.

  • Which aircraft models fly most regularly from Washington, D.C. to Koh Samui?

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

  • Which airline alliances offer flights from Washington, D.C. to Koh Samui?

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

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

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. 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, D.C. 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, D.C. 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, D.C. with another airline.

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

See more FAQs

Flights to Koh Samui

Destination:

Koh Samui (USM)Thailand

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