Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Washington, D.C. Reagan-National Airport to Ko Samui from $1,209

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Washington, D.C. Reagan-National Airport to Ko Samui

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:59 pm - 7:40 pmDCA  Washington, D.C. Reagan-National-USM Ko Samui
43h 41m2 stops Chicago O'Hare Intl Hong Kong Intl
Multiple Airlines Logo
11:55 am - 7:59 pmUSM  Ko Samui-DCA Washington, D.C. Reagan-National
43h 04m2 stops Hong Kong Intl Chicago O'Hare Intl
$1,209Multiple Airlines
Sun, Oct 11 - Sun, Oct 18
Multiple Airlines Logo
11:31 am - 7:40 pmDCA  Washington, D.C. Reagan-National-USM Ko Samui
45h 09m2 stops Chicago O'Hare Intl Hong Kong Intl
Multiple Airlines Logo
11:55 am - 8:37 pmUSM  Ko Samui-DCA Washington, D.C. Reagan-National
43h 42m2 stops Hong Kong Intl Los Angeles
$1,310Multiple Airlines
Thu, Sep 10 - Sun, Sep 20
Multiple Airlines Logo
6:30 am - 7:40 pmDCA  Washington, D.C. Reagan-National-USM Ko Samui
26h 10m2 stops New York John F Kennedy Intl Hong Kong Intl
Multiple Airlines Logo
11:55 am - 8:06 pmUSM  Ko Samui-DCA Washington, D.C. Reagan-National
43h 11m2 stops Hong Kong Intl Chicago O'Hare Intl
$1,322Multiple Airlines
Thu, Sep 17 - Sun, Sep 20
Multiple Airlines Logo
6:30 am - 7:40 pmDCA  Washington, D.C. Reagan-National-USM Ko Samui
26h 10m2 stops New York John F Kennedy Intl Hong Kong Intl
Multiple Airlines Logo
11:55 am - 8:06 pmUSM  Ko Samui-DCA Washington, D.C. Reagan-National
43h 11m2 stops Hong Kong Intl Chicago O'Hare Intl
$1,377Multiple Airlines
Sat, Sep 12 - Tue, Sep 15
Multiple Airlines Logo
5:00 pm - 7:40 pmDCA  Washington, D.C. Reagan-National-USM Ko Samui
39h 40m2 stops Dallas/Fort Worth Hong Kong Intl
Multiple Airlines Logo
11:55 am - 7:59 pmUSM  Ko Samui-DCA Washington, D.C. Reagan-National
43h 04m2 stops Hong Kong Intl Chicago O'Hare Intl
$1,603Multiple Airlines
Mon, Oct 12 - Mon, Oct 19
Cathay Pacific Logo
11:31 am - 7:40 pmDCA  Washington, D.C. Reagan-National-USM Ko Samui
45h 09m2 stops Chicago O'Hare Intl Hong Kong Intl
Cathay Pacific Logo
11:55 am - 8:06 pmUSM  Ko Samui-DCA Washington, D.C. Reagan-National
43h 11m2 stops Hong Kong Intl Chicago O'Hare Intl
$1,617Cathay Pacific
Thu, Sep 17 - Sun, Sep 27
Multiple Airlines Logo
6:30 am - 7:40 pmDCA  Washington, D.C. Reagan-National-USM Ko Samui
26h 10m2 stops New York John F Kennedy Intl Hong Kong Intl
Multiple Airlines Logo
11:55 am - 8:06 pmUSM  Ko Samui-DCA Washington, D.C. Reagan-National
43h 11m2 stops Hong Kong Intl Chicago O'Hare Intl
$1,629Multiple Airlines
Fri, Sep 18 - Sun, Sep 27
Multiple Airlines Logo
6:59 pm - 6:15 pmDCA  Washington, D.C. Reagan-National-USM Ko Samui
59h 16m2 stops San Francisco Singapore Changi
Multiple Airlines Logo
1:25 pm - 10:52 pmUSM  Ko Samui-DCA Washington, D.C. Reagan-National
45h 27m3 stops Singapore Changi Frankfurt am Main New York John F Kennedy Intl
$2,201Multiple Airlines
Sun, Nov 8 - Wed, Nov 25
Multiple Airlines Logo
6:25 am - 9:05 pmDCA  Washington, D.C. Reagan-National-USM Ko Samui
50h 40m3 stops New York John F Kennedy Intl Frankfurt am Main Singapore Changi
Multiple Airlines Logo
1:25 pm - 10:52 pmUSM  Ko Samui-DCA Washington, D.C. Reagan-National
45h 27m3 stops Singapore Changi Frankfurt am Main New York John F Kennedy Intl
$2,211Multiple Airlines
Sun, Nov 8 - Wed, Nov 25
Multiple Airlines Logo
9:30 am - 6:15 pmDCA  Washington, D.C. Reagan-National-USM Ko Samui
44h 45m2 stops Los Angeles Singapore Changi
Multiple Airlines Logo
4:25 pm - 10:52 pmUSM  Ko Samui-DCA Washington, D.C. Reagan-National
42h 27m2 stops Singapore Changi New York John F Kennedy Intl
$2,288Multiple Airlines
Sun, Nov 8 - Wed, Nov 25

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

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

Trusted and free

Trusted and free

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

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

momondo Fare Finder

 
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Ko Samui that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Ko Samui

DCA Washington, D.C. Reagan-National - USM Ko Samui

DCAUSM

Washington, D.C. Reagan-National

Sun 10/11

12:59 pm-7:40 pm

2 stops43h 41m

Ko Samui

Sun 10/18

11:55 am-7:59 pm

2 stops43h 04m

$1,209

Washington, D.C.Ko Samui

DCA Washington, D.C. Reagan-National - USM Ko Samui

DCAUSM

Washington, D.C. Reagan-National

Thu 9/10

11:31 am-7:40 pm

2 stops45h 09m

Ko Samui

Sun 9/20

11:55 am-8:37 pm

2 stops43h 42m

$1,310
Quickest round-trip

Washington, D.C.Ko Samui

DCA Washington, D.C. Reagan-National - USM Ko Samui

DCAUSM

Washington, D.C. Reagan-National

Thu 9/17

6:30 am-7:40 pm

2 stops26h 10m

Ko Samui

Sun 9/20

11:55 am-8:06 pm

2 stops43h 11m

$1,322

Washington, D.C.Ko Samui

DCA Washington, D.C. Reagan-National - USM Ko Samui

DCAUSM

Washington, D.C. Reagan-National

Sat 9/12

6:30 am-7:40 pm

2 stops26h 10m

Ko Samui

Tue 9/15

11:55 am-8:06 pm

2 stops43h 11m

$1,377

Washington, D.C.Ko Samui

DCA Washington, D.C. Reagan-National - USM Ko Samui

DCAUSM

Washington, D.C. Reagan-National

Mon 10/12

5:00 pm-7:40 pm

2 stops39h 40m

Ko Samui

Mon 10/19

11:55 am-7:59 pm

2 stops43h 04m

$1,603

Washington, D.C.Ko Samui

DCA Washington, D.C. Reagan-National - USM Ko Samui

DCAUSM

Washington, D.C. Reagan-National

Thu 9/17

11:31 am-7:40 pm

2 stops45h 09m

Ko Samui

Sun 9/27

11:55 am-8:06 pm

2 stops43h 11m

$1,617

Washington, D.C.Ko Samui

DCA Washington, D.C. Reagan-National - USM Ko Samui

DCAUSM

Washington, D.C. Reagan-National

Fri 9/18

6:30 am-7:40 pm

2 stops26h 10m

Ko Samui

Sun 9/27

11:55 am-8:06 pm

2 stops43h 11m

$1,629

Washington, D.C.Ko Samui

DCA Washington, D.C. Reagan-National - USM Ko Samui

DCAUSM

Washington, D.C. Reagan-National

Sun 11/8

6:59 pm-6:15 pm

2 stops59h 16m

Ko Samui

Wed 11/25

1:25 pm-10:52 pm

3 stops45h 27m

$2,201

Washington, D.C.Ko Samui

DCA Washington, D.C. Reagan-National - USM Ko Samui

DCAUSM

Washington, D.C. Reagan-National

Sun 11/8

6:25 am-9:05 pm

3 stops50h 40m

Ko Samui

Wed 11/25

1:25 pm-10:52 pm

3 stops45h 27m

$2,211

Washington, D.C.Ko Samui

DCA Washington, D.C. Reagan-National - USM Ko Samui

DCAUSM

Washington, D.C. Reagan-National

Sun 11/8

9:30 am-6:15 pm

2 stops44h 45m

Ko Samui

Wed 11/25

4:25 pm-10:52 pm

2 stops42h 27m

$2,288

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Ko Samui from

How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport to Ko 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

How often are flights from Washington, D.C. to Ko Samui delayed?

Historically, on average around 21% of flights between Washington, D.C. and Ko Samui have experienced a delay on any given week. The average delay length over the past 12 months has been 132 minutes.

What is the most punctual flight time for Washington, D.C. to Ko Samui flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Washington, D.C. to Ko Samui flights?

According to our data, Delta have had the least number of delays on this route over the last 12 months; with about 15% of their flights experiencing any sort of delay.

When to book flights from Washington, D.C. Reagan-National Airport to Ko Samui

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Reagan-National Airport to Ko Samui according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Reagan-National Airport to Ko Samui (DCA to USM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Reagan-National Airport to Ko Samui

Best Price Found

$1,209

Fastest flight time

43h 41m

Direct flights

None
The best flight deal from Washington, D.C. Reagan-National Airport to Ko Samui found on momondo in the last 72 hours is $1,209
The fastest flight from Washington, D.C. Reagan-National Airport to Ko Samui takes 43h 41m
There are no direct flights from Washington, D.C. Reagan-National Airport to Ko Samui. There are no popular flight routes from Washington, D.C. Reagan-National Airport to Ko Samui.
Search flight deals

Frequently asked questions about flying from Washington, D.C. Reagan-National Airport to Ko Samui

  • How far is Washington, D.C. Reagan-National to Ko Samui by plane?

    There are 9082.9 mi between Washington, D.C. Reagan-National and Ko Samui. 43h 41m is a normal flight duration for this route.

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

    Prices for flights from Washington, D.C. Reagan-National Airport to Ko Samui Airport were last updated today.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Reagan-National Airport to Ko Samui Airport.

  • What documentation or ID do you need to fly to Ko Samui Airport?

    The travel and health documents required for your trip to Ko Samui Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ko Samui Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Ko Samui?

Book flights to Ko Samui if you plan to visit one of these locations
Ko Pha Ngan
Ko Tao
Khanom

Why use momondo?

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

Finding the right flight to Ko Samui from Washington, D.C. is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ko Samui quick and easy, saving you time and money.

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

Flights from Washington, D.C. to Ko Samui with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ko Samui from Washington, D.C..

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

Price alerts on flights to Ko Samui from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Ko Samui trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 9/29
Tue 10/6
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Thailand