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Cheap flights from Washington, D.C. to Koh Samui from $1,176

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Koh Samui departing on 5/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. to Koh Samui

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.
3:00 pm - 10:35 amIAD-USM
32h 35m2 stops
7:10 pm - 1:15 pmUSM-IAD
29h 05m2 stops
$1,347Turkish Airlines
Find Deal
jue., mar. 20 - mié., mar. 26
10:25 pm - 3:35 pmIAD-USM
30h 10m2 stops
7:00 am - 10:50 amUSM-IAD
38h 50m2 stops
$1,360Turkish Airlines
Find Deal
sáb., mar. 22 - sáb., mar. 29
9:40 pm - 3:35 pmIAD-USM
30h 55m3 stops
9:05 pm - 7:50 pmUSM-IAD
33h 45m3 stops
$1,539
Find Deal
jue., mar. 20 - mié., mar. 26
11:00 am - 8:00 amIAD-USM
34h 00m3 stops
6:45 am - 3:45 pmUSM-IAD
44h 00m3 stops
$1,573
Find Deal
sáb., mar. 22 - sáb., mar. 29
11:00 am - 8:00 amIAD-USM
34h 00m3 stops
7:25 pm - 7:45 pmUSM-IAD
35h 20m2 stops
$1,730
Find Deal
sáb., mar. 22 - sáb., mar. 29
10:55 am - 9:20 amIAD-USM
59h 25m2 stops
5:55 pm - 8:40 amUSM-IAD
49h 45m2 stops
$1,733Emirates
Find Deal
vie., may. 9 - lun., jul. 7
7:50 pm - 7:35 pmDCA-USM
36h 45m2 stops
11:40 am - 9:59 amUSM-DCA
33h 19m2 stops
$1,909Cathay Pacific
Find Deal
sáb., mar. 22 - sáb., mar. 29
7:50 pm - 3:40 pmDCA-USM
32h 50m3 stops
11:40 am - 9:59 amUSM-DCA
33h 19m2 stops
$1,930Cathay Pacific
Find Deal
sáb., mar. 22 - sáb., mar. 29
7:00 am - 6:15 pmIAD-USM
48h 15m3 stops
1:25 pm - 5:55 amUSM-IAD
27h 30m2 stops
$2,751Singapore Airlines
Find Deal
jue., mar. 20 - mié., mar. 26
5:20 pm - 6:15 pmBWI-USM
37h 55m2 stops
1:25 pm - 6:46 amUSM-BWI
52h 21m3 stops
$3,100Singapore Airlines
Find Deal
sáb., mar. 22 - sáb., mar. 29
9:05 pm - 6:00 pmIAD-USM
33h 55m2 stops
$1,176Qatar Airways
Find Deal
jue., may. 8
5:50 pm - 6:20 pmBWI-USM
61h 30m3 stops
$1,349Singapore Airlines
Find Deal
jue., may. 8
5:50 pm - 9:15 pmBWI-USM
64h 25m3 stops
$1,357Singapore Airlines
Find Deal
jue., may. 8
9:30 am - 9:15 pmDCA-USM
48h 45m2 stops
$1,493Singapore Airlines
Find Deal
jue., may. 8
9:30 am - 6:20 pmDCA-USM
45h 50m2 stops
$1,503Singapore Airlines
Find Deal
jue., may. 8
7:00 am - 9:15 pmIAD-USM
51h 15m3 stops
$1,506Singapore Airlines
Find Deal
jue., may. 8
9:30 am - 6:20 pmDCA-USM
45h 50m3 stops
$1,506Singapore Airlines
Find Deal
jue., may. 8
7:00 am - 9:15 pmIAD-USM
51h 15m3 stops
$1,516Singapore Airlines
Find Deal
jue., may. 8
9:30 am - 6:20 pmDCA-USM
45h 50m3 stops
$1,516Singapore Airlines
Find Deal
jue., may. 8
5:50 pm - 6:20 pmBWI-USM
37h 30m2 stops
$1,548Singapore Airlines
Find Deal
jue., may. 8
9:44 am - 7:35 pmDCA-USM
45h 51m2 stops
11:40 am - 4:25 pmUSM-DCA
40h 45m2 stops
$2,903Cathay Pacific
Find Deal
vie., nov. 22 - lun., nov. 25
9:10 am - 6:15 pmDCA-USM
45h 05m2 stops
4:25 pm - 8:59 pmUSM-DCA
40h 34m3 stops
$4,282Singapore Airlines
Find Deal
vie., nov. 22 - lun., nov. 25
5:35 pm - 9:05 pmBWI-USM
39h 30m2 stops
1:25 pm - 4:26 pmUSM-BWI
39h 01m2 stops
$4,299Singapore Airlines
Find Deal
vie., nov. 22 - lun., nov. 25
5:35 pm - 6:15 pmBWI-USM
36h 40m2 stops
1:25 pm - 4:26 pmUSM-BWI
63h 01m3 stops
$4,610Singapore Airlines
Find Deal
vie., nov. 22 - lun., nov. 25

Cathay Pacific flights from Washington, D.C. to Koh Samui

Our best Cathay Pacific deals on Washington, D.C. to Koh Samui flight tickets
Cathay Pacific
Mar 22
DCA7:50 pmWashington, D.C. Reagan-National
36h 45m
2 stops
USM7:35 pmKo Samui
Mar 29
USM11:40 amKo Samui
33h 19m
2 stops
DCA9:59 amWashington, D.C. Reagan-National
Cathay Pacific
Mar 22
DCA7:50 pmWashington, D.C. Reagan-National
32h 50m
3 stops
USM3:40 pmKo Samui
Mar 29
USM11:40 amKo Samui
33h 19m
2 stops
DCA9:59 amWashington, D.C. Reagan-National
Cathay Pacific
Mar 22
DCA12:30 pmWashington, D.C. Reagan-National
40h 10m
3 stops
USM3:40 pmKo Samui
Mar 29
USM8:20 amKo Samui
26h 09m
3 stops
DCA11:29 pmWashington, D.C. Reagan-National

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

Our best Turkish Airlines deals on Washington, D.C. to Koh Samui flight tickets
Turkish Airlines
Mar 20
IAD3:00 pmWashington, D.C. Dulles Intl
32h 35m
2 stops
USM10:35 amKo Samui
Mar 26
USM7:10 pmKo Samui
29h 05m
2 stops
IAD1:15 pmWashington, D.C. Dulles Intl
Turkish Airlines
Mar 22
IAD10:25 pmWashington, D.C. Dulles Intl
30h 10m
2 stops
USM3:35 pmKo Samui
Mar 29
USM7:00 amKo Samui
38h 50m
2 stops
IAD10:50 amWashington, D.C. Dulles Intl
Turkish Airlines
Dec 27
IAD2:00 pmWashington, D.C. Dulles Intl
43h 05m
2 stops
USM9:05 pmKo Samui
Jan 9
USM3:50 pmKo Samui
32h 25m
2 stops
IAD12:15 pmWashington, D.C. Dulles Intl

See travel insights to Koh Samui from

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

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

According to our data, Monday is the cheapest day to fly to Koh Samui from Washington, D.C.. The lowest ticket price found for a Monday departure recently was $0. 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 $2,149.

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 morning. momondo users have found flights departing from Washington, D.C. to Koh Samui in the morning for as low as $0. 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 $1,733. 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

$1,176

Fastest flight time

30h 10m

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 $1,176. The best round-trip flight deal from Washington, D.C. to Koh Samui found on momondo in the last 72 hours is $1,347.
The fastest flight from Washington, D.C. to Koh Samui takes 30h 10m
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)

  • 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 30h 10m.

  • 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?


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.


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