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

Qatar Airways and Singapore Airlines are the most popular carriers operating from Washington, D.C. to Ko Samui

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.

$1,012 Cheap Flights from Washington, D.C. to Koh Samui in 2024/25

1 adult

0 bags

"This year, momondo is the #1 place for airfares on the internet."

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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

Round-tripOne-way

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 to Koh Samui

The cheapest plane tickets to Koh Samui found on KAYAK recently.

1:30 pm - 8:10 amIAD-USM

30h 40m2 stops

9:15 pm - 7:45 pmUSM-IAD

33h 30m2 stops

$1,317Turkish Airlines

Find Deal

Wed, Mar 5 - Wed, Apr 30

9:05 pm - 6:15 pmIAD-USM

34h 10m2 stops

8:15 am - 4:55 pmUSM-IAD

67h 40m2 stops

$1,405

Find Deal

Sun, Mar 9 - Thu, Mar 13

8:05 pm - 7:35 pmIAD-USM

59h 30m2 stops

8:15 am - 3:55 pmUSM-IAD

67h 40m2 stops

$1,411

Find Deal

Tue, Jan 14 - Thu, Jan 23

9:05 pm - 1:55 pmIAD-USM

29h 50m2 stops

8:00 am - 8:45 amUSM-IAD

35h 45m2 stops

$1,502Qatar Airways

Find Deal

Fri, May 9 - Mon, Jul 7

9:40 pm - 3:35 pmIAD-USM

30h 55m3 stops

9:30 pm - 7:50 pmUSM-IAD

33h 20m3 stops

$1,554

Find Deal

Thu, Mar 20 - Wed, Mar 26

9:29 am - 7:35 pmDCA-USM

46h 06m2 stops

11:40 am - 6:57 pmUSM-DCA

43h 17m2 stops

$1,858Cathay Pacific

Find Deal

Tue, Jan 14 - Thu, Jan 23

9:00 am - 6:15 pmDCA-USM

45h 15m2 stops

4:25 pm - 8:55 pmUSM-DCA

63h 30m3 stops

$1,966Singapore Airlines

Find Deal

Wed, Mar 5 - Wed, Apr 30

5:00 pm - 6:20 pmIAD-USM

38h 20m2 stops

4:25 pm - 4:50 pmUSM-IAD

59h 25m3 stops

$2,106Singapore Airlines

Find Deal

Fri, May 9 - Mon, Jul 7

11:51 am - 7:35 pmBWI-USM

44h 44m2 stops

11:40 am - 9:47 pmUSM-BWI

45h 07m2 stops

$2,121Cathay Pacific

Find Deal

Sun, Mar 9 - Thu, Mar 13

9:00 am - 6:15 pmDCA-USM

45h 15m2 stops

1:30 pm - 8:55 pmUSM-DCA

42h 25m2 stops

$2,159Singapore Airlines

Find Deal

Wed, Mar 5 - Wed, Apr 30

9:05 pm - 6:00 pmIAD-USM

33h 55m2 stops

$1,012Qatar Airways

Find Deal

Thu, May 8

9:30 am - 6:20 pmDCA-USM

45h 50m2 stops

$1,503Singapore Airlines

Find Deal

Thu, May 8

9:30 am - 6:20 pmDCA-USM

45h 50m3 stops

$1,516Singapore Airlines

Find Deal

Thu, May 8

6:54 pm - 6:20 pmBWI-USM

36h 26m2 stops

$1,558Singapore Airlines

Find Deal

Thu, May 8

Singapore Airlines flights from Washington, D.C. to Koh Samui

Our best Singapore Airlines deals on Washington, D.C. to Koh Samui flight tickets

Singapore Airlines

Mar 5

DCA9:00 amWashington, D.C. Reagan-National

45h 15m

2 stops

USM6:15 pmKo Samui

Apr 30

USM4:25 pmKo Samui

63h 30m

3 stops

DCA8:55 pmWashington, D.C. Reagan-National

$1,966

Find similar

Singapore Airlines

May 9

IAD5:00 pmWashington, D.C. Dulles Intl

38h 20m

2 stops

USM6:20 pmKo Samui

Jul 7

USM4:25 pmKo Samui

59h 25m

3 stops

IAD4:50 pmWashington, D.C. Dulles Intl

$2,106

Find similar

Singapore Airlines

Mar 5

DCA9:00 amWashington, D.C. Reagan-National

45h 15m

2 stops

USM6:15 pmKo Samui

Apr 30

USM1:30 pmKo Samui

42h 25m

2 stops

DCA8:55 pmWashington, D.C. Reagan-National

$2,159

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

May 9

IAD9:05 pmWashington, D.C. Dulles Intl

29h 50m

2 stops

USM1:55 pmKo Samui

Jul 7

USM8:00 amKo Samui

35h 45m

2 stops

IAD8:45 amWashington, D.C. Dulles Intl

$1,502

Find similar

Qatar Airways

Jan 1

IAD8:05 pmWashington, D.C. Dulles Intl

25h 15m

2 stops

USM9:20 amKo Samui

Feb 3

USM9:05 pmKo Samui

30h 50m

2 stops

IAD3:55 pmWashington, D.C. Dulles Intl

$6,774

Find similar

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

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

According to our data, Thursday is the cheapest day to fly to Koh Samui from Washington, D.C.. The lowest ticket price found for a Thursday departure recently was $1,288. 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, Tuesday 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 $2,091.

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 afternoon. momondo users have found flights departing from Washington, D.C. to Koh Samui in the afternoon for as low as $1,694. 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 evening because they tend to be around $1,834. 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	$1,012
Fastest flight time	26h 35m
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 $1,012. The best round-trip flight deal from Washington, D.C. to Koh Samui found on momondo in the last 72 hours is $1,317.

The fastest flight from Washington, D.C. to Koh Samui takes 26h 35m

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)

Search flight deals

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 35m.
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.

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.