What is the cheapest airline that flies from Washington, D.C. to Ko Samui?

Japan Airlines is the most popular carrier operating from Washington, D.C. to Ko Samui

How long does it take to fly to Koh Samui?

Flight times vary depending on what airport in Washington, D.C. you fly out of and what airport in Koh Samui you fly into. For example, flying from Washington, D.C. to Koh Samui takes 30h 20m on average. On the other hand, flying from Baltimore to Koh Samui takes 33h 45m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

When did momondo last update prices for flights from Washington, D.C. to Ko Samui Airport?

Prices for flights from Washington, D.C. to Ko Samui Airport are updated daily.

How old do you have to be to fly from Washington, D.C. to Ko Samui Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. 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.

$146 Cheap Flights from Washington, D.C. to Koh Samui in 2025

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Find the cheapest flights from Washington, D.C. to Koh Samui

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Cheap round-trip flights

These are some of the best round-trip flight deals from Washington, D.C. to Koh Samui that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Washington, D.C. to Koh Samui.

Cheap last minute flights

Planning a quick getaway from Washington, D.C. to Koh Samui? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Koh Samui, so you can enjoy a seamless trip without layovers.

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 from Washington, D.C. to Koh Samui

The cheapest plane tickets from Washington, D.C. to Koh Samui found on KAYAK recently.

3:00 pm - 7:40 amIAD-USM

29h 40m2 stops

8:20 am - 8:30 pmUSM-IAD

47h 10m2 stops

$1,345Turkish Airlines

Find Deal

Thu, Mar 20 - Wed, Mar 26

9:05 pm - 10:40 amIAD-USM

26h 35m2 stops

7:00 pm - 4:55 pmUSM-IAD

32h 55m2 stops

$1,346Qatar Airways

Find Deal

Sun, Mar 9 - Mon, Mar 17

9:05 pm - 5:30 pmIAD-USM

33h 25m2 stops

7:00 pm - 4:55 pmUSM-IAD

32h 55m2 stops

$1,352Qatar Airways

Find Deal

Mon, Mar 10 - Mon, Mar 17

12:35 pm - 6:00 pmIAD-USM

42h 25m2 stops

6:25 pm - 7:45 pmUSM-IAD

36h 20m2 stops

$1,567Turkish Airlines

Find Deal

Sat, Jun 21 - Sat, Jun 28

11:40 am - 7:35 pmDCA-USM

44h 55m2 stops

11:40 am - 9:29 amUSM-DCA

32h 49m2 stops

$1,943Cathay Pacific

Find Deal

Mon, Mar 10 - Mon, Mar 17

11:40 am - 7:35 pmDCA-USM

44h 55m2 stops

11:40 am - 4:29 pmUSM-DCA

39h 49m2 stops

$1,969Cathay Pacific

Find Deal

Sun, Mar 9 - Mon, Mar 17

5:50 pm - 6:15 pmBWI-USM

37h 25m2 stops

1:30 pm - 4:47 pmUSM-BWI

38h 17m2 stops

$2,459Singapore Airlines

Find Deal

Tue, Jun 17 - Fri, Jul 4

9:20 pm - 6:15 pmBWI-USM

33h 55m2 stops

1:30 pm - 7:35 pmUSM-BWI

41h 05m2 stops

$2,559British Airways

Find Deal

Fri, Apr 18 - Fri, May 2

9:00 am - 9:10 pmDCA-USM

49h 10m2 stops

1:30 pm - 8:59 pmUSM-DCA

42h 29m2 stops

$2,589Singapore Airlines

Find Deal

Fri, Mar 28 - Sat, Apr 5

1:50 pm - 6:15 pmBWI-USM

41h 25m3 stops

1:30 pm - 7:35 pmUSM-BWI

41h 05m2 stops

$2,811British Airways

Find Deal

Fri, Apr 18 - Fri, May 2

10:00 am - 6:30 pmIAD-USM

44h 30m3 stops

$601

Find Deal

Tue, Feb 25

10:00 am - 8:30 pmIAD-USM

46h 30m2 stops

$679

Find Deal

Tue, Feb 25

7:34 am - 8:10 amBWI-USM

36h 36m3 stops

$844Japan Airlines

Find Deal

Tue, Feb 25

5:15 pm - 7:35 pmDCA-USM

38h 20m2 stops

$947

Find Deal

Tue, Feb 25

6:32 am - 8:50 pmDCA-USM

26h 18m3 stops

$986

Find Deal

Tue, Feb 25

8:30 am - 1:05 pmBWI-USM

40h 35m2 stops

$1,281

Find Deal

Tue, Feb 25

British Airways flights from Washington, D.C. to Koh Samui

Our best British Airways deals on Washington, D.C. to Koh Samui flight tickets

British Airways

Apr 18

BWI9:20 pmBaltimore/Washington

33h 55m

2 stops

USM6:15 pmKo Samui

May 2

USM1:30 pmKo Samui

41h 05m

2 stops

BWI7:35 pmBaltimore/Washington

$2,559

Find similar

British Airways

Apr 18

BWI1:50 pmBaltimore/Washington

41h 25m

3 stops

USM6:15 pmKo Samui

May 2

USM1:30 pmKo Samui

41h 05m

2 stops

BWI7:35 pmBaltimore/Washington

$2,811

Find similar

British Airways

Jun 21

BWI9:20 pmBaltimore/Washington

33h 55m

2 stops

USM6:15 pmKo Samui

Jun 28

USM4:25 pmKo Samui

38h 10m

2 stops

BWI7:35 pmBaltimore/Washington

$2,844

Find similar

Qatar Airways flights from Washington, D.C. to Koh Samui

Our best Qatar Airways deals on Washington, D.C. to Koh Samui flight tickets

Qatar Airways

Mar 9

IAD9:05 pmWashington, D.C. Dulles Intl

26h 35m

2 stops

USM10:40 amKo Samui

Mar 17

USM7:00 pmKo Samui

32h 55m

2 stops

IAD4:55 pmWashington, D.C. Dulles Intl

$1,346

Find similar

Qatar Airways

Mar 10

IAD9:05 pmWashington, D.C. Dulles Intl

33h 25m

2 stops

USM5:30 pmKo Samui

Mar 17

USM7:00 pmKo Samui

32h 55m

2 stops

IAD4:55 pmWashington, D.C. Dulles Intl

$1,352

Find similar

Qatar Airways

Mar 28

IAD9:05 pmWashington, D.C. Dulles Intl

26h 25m

2 stops

USM10:30 amKo Samui

Apr 5

USM3:25 pmKo Samui

35h 45m

2 stops

IAD4:10 pmWashington, D.C. Dulles Intl

$1,405

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How to get the cheapest flight ticket from Washington, D.C. 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

Prices

Airlines

Other information

What is the cheapest day to depart on your flight to Koh Samui?

According to our data, Wednesday is the cheapest day to fly to Koh Samui from Washington, D.C.. The lowest ticket price found for a Wednesday departure recently was $343. 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, Sunday is the most expensive day to depart from Washington, D.C. because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $814.

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 evening. momondo users have found flights departing from Washington, D.C. to Koh Samui in the evening for as low as $281. 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 morning because they tend to be around $411. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to Koh Samui according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Washington, D.C. to Koh Samui (WAS to USM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Koh Samui

Best Price Found	$601
Fastest flight time	26h 18m
Direct flights	None
Airports in Koh Samui	1 airport

The best one-way flight to Koh Samui from Washington, D.C. in the past 72 hours is $601. The best round-trip flight deal from Washington, D.C. to Koh Samui found on momondo in the last 72 hours is $1,345.

The fastest flight from Washington, D.C. to Koh Samui takes 26h 18m

There are no direct flights from Washington, D.C. to Koh Samui. Popular non-direct routes for this connection are Washington, D.C. Reagan-National Airport - Ko Samui Airport, Baltimore/Washington Airport - Ko Samui Airport and Washington, D.C. Dulles Intl Airport - Ko Samui Airport.

There is 1 airport near Koh Samui: Ko Samui (USM)

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How far is Washington, D.C. to Ko Samui by plane?
Washington, D.C. and Ko Samui are 9079.2 mi apart from one another. A reasonable flight in good conditions will take 26h 25m.
When did momondo last update prices for flights from Washington, D.C. to Ko Samui Airport?
Prices for flights from Washington, D.C. to Ko Samui Airport are updated daily.
How old do you have to be to fly from Washington, D.C. to Ko Samui Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. 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 Washington, D.C. to Koh Samui?
Based on momondo bookings for flights between Washington, D.C. and Koh Samui, the leading airline is Turkish Airlines, making up 100% of the total bookings.

Ko Pha Ngan

Ko Tao

Khanom

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Koh Samui?

It is quick and easy to find Washington, D.C. to Koh Samui flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Koh Samui that suits you.

Can I find flights from Washington, D.C. to Koh Samui with flexible booking policies on momondo?

All flight searches from Washington, D.C. to Koh Samui on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Washington, D.C. to Koh Samui?

Once all potential Washington, D.C. to Koh Samui flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Washington, D.C. to Koh Samui right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Washington, D.C. to Koh Samui flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.