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 16% of their flights experiencing any sort of delay.

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.

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 133 minutes.

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. Friday has historically seen more delays on average compared to the rest of the week.

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.

$581 Cheap Flights from Washington, D.C. Reagan-National Airport to Ko Samui in 2026/27

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

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:30 am - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

46h 05m2 stops Los Angeles Hong Kong Intl

11:40 am - 6:04 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

42h 24m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,243Multiple Airlines

Sat, Nov 14 - Mon, Nov 23

10:11 am - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

45h 24m2 stops Chicago O'Hare Intl Hong Kong Intl

11:40 am - 6:04 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

42h 24m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,307Cathay Pacific

Sun, Nov 8 - Thu, Nov 12

7:00 pm - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

36h 35m2 stops Dallas/Fort Worth Hong Kong Intl

11:40 am - 6:04 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

42h 24m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,323Cathay Pacific

Sat, Nov 14 - Mon, Nov 23

10:11 am - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

45h 24m2 stops Chicago O'Hare Intl Hong Kong Intl

11:40 am - 6:04 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

42h 24m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,354Cathay Pacific

Sun, Nov 8 - Thu, Nov 12

2:59 pm - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

40h 36m2 stops Dallas/Fort Worth Hong Kong Intl

11:40 am - 3:59 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

40h 19m2 stops Hong Kong Intl Los Angeles

$1,425Multiple Airlines

Sat, Jan 16 - Sat, Jan 30

6:59 pm - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

36h 36m2 stops Dallas/Fort Worth Hong Kong Intl

11:40 am - 9:59 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

46h 19m2 stops Hong Kong Intl Seattle/Tacoma Intl

$1,427Cathay Pacific

Sat, Jan 16 - Fri, Jan 29

10:10 am - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

45h 25m2 stops Chicago O'Hare Intl Hong Kong Intl

11:40 am - 9:59 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

46h 19m2 stops Hong Kong Intl Seattle/Tacoma Intl

$1,454Cathay Pacific

Sun, Jan 17 - Fri, Jan 29

10:10 am - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

45h 25m2 stops Chicago O'Hare Intl Hong Kong Intl

11:40 am - 6:03 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

42h 23m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,508Cathay Pacific

Sun, Jan 17 - Sat, Jan 30

10:10 am - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

45h 25m2 stops Chicago O'Hare Intl Hong Kong Intl

11:40 am - 9:59 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

46h 19m2 stops Hong Kong Intl Seattle/Tacoma Intl

$1,588Cathay Pacific

Sun, Jan 31 - Mon, Feb 8

3:30 pm - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

40h 05m2 stops Dallas/Fort Worth Hong Kong Intl

11:40 am - 3:59 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

40h 19m2 stops Hong Kong Intl Los Angeles

$1,602Multiple Airlines

Mon, Jan 25 - Sun, Feb 7

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Cathay Pacific flights from Washington, D.C. Reagan-National Airport to Ko Samui

Our best Cathay Pacific deals on Washington, D.C. Reagan-National Airport to Ko Samui flight tickets

Cathay Pacific

Nov 8

DCA10:11 amWashington, D.C. Reagan-National

45h 24m

2 stops

USM7:35 pmKo Samui

Nov 12

USM11:40 amKo Samui

42h 24m

2 stops

DCA6:04 pmWashington, D.C. Reagan-National

$1,307

Cathay Pacific

Nov 14

DCA7:00 pmWashington, D.C. Reagan-National

36h 35m

2 stops

USM7:35 pmKo Samui

Nov 23

USM11:40 amKo Samui

42h 24m

2 stops

DCA6:04 pmWashington, D.C. Reagan-National

$1,323

Cathay Pacific

Nov 8

DCA10:11 amWashington, D.C. Reagan-National

45h 24m

2 stops

USM7:35 pmKo Samui

Nov 12

USM11:40 amKo Samui

42h 24m

2 stops

DCA6:04 pmWashington, D.C. Reagan-National

$1,354

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

Sat 11/14

9:30 am-7:35 pm

2 stops46h 05m

Ko Samui

Mon 11/23

11:40 am-6:04 pm

2 stops42h 24m

$1,243

Washington, D.C.Ko Samui

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

DCAUSM

Washington, D.C. Reagan-National

Sun 11/8

10:11 am-7:35 pm

2 stops45h 24m

Ko Samui

Thu 11/12

11:40 am-6:04 pm

2 stops42h 24m

$1,307

Quickest round-trip

Washington, D.C.Ko Samui

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

DCAUSM

Washington, D.C. Reagan-National

Sat 11/14

7:00 pm-7:35 pm

2 stops36h 35m

Ko Samui

Mon 11/23

11:40 am-6:04 pm

2 stops42h 24m

$1,323

Washington, D.C.Ko Samui

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

DCAUSM

Washington, D.C. Reagan-National

Sun 11/8

10:11 am-7:35 pm

2 stops45h 24m

Ko Samui

Thu 11/12

11:40 am-6:04 pm

2 stops42h 24m

$1,354

Washington, D.C.Ko Samui

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

DCAUSM

Washington, D.C. Reagan-National

Sat 1/16

2:59 pm-7:35 pm

2 stops40h 36m

Ko Samui

Sat 1/30

11:40 am-3:59 pm

2 stops40h 19m

$1,425

Washington, D.C.Ko Samui

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

DCAUSM

Washington, D.C. Reagan-National

Sat 1/16

6:59 pm-7:35 pm

2 stops36h 36m

Ko Samui

Fri 1/29

11:40 am-9:59 pm

2 stops46h 19m

$1,427

Washington, D.C.Ko Samui

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

DCAUSM

Washington, D.C. Reagan-National

Sun 1/17

10:10 am-7:35 pm

2 stops45h 25m

Ko Samui

Fri 1/29

11:40 am-9:59 pm

2 stops46h 19m

$1,454

Washington, D.C.Ko Samui

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

DCAUSM

Washington, D.C. Reagan-National

Sun 1/17

10:10 am-7:35 pm

2 stops45h 25m

Ko Samui

Sat 1/30

11:40 am-6:03 pm

2 stops42h 23m

$1,508

Washington, D.C.Ko Samui

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

DCAUSM

Washington, D.C. Reagan-National

Sun 1/31

10:10 am-7:35 pm

2 stops45h 25m

Ko Samui

Mon 2/8

11:40 am-9:59 pm

2 stops46h 19m

$1,588

Washington, D.C.Ko Samui

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

DCAUSM

Washington, D.C. Reagan-National

Mon 1/25

3:30 pm-7:35 pm

2 stops40h 05m

Ko Samui

Sun 2/7

11:40 am-3:59 pm

2 stops40h 19m

$1,602

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Airlines

Delays

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

Cathay Pacific is the most popular carrier operating from Washington, D.C. Reagan-National to Ko Samui

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	$581
Fastest flight time	25h 20m
Direct flights	None

The best one-way flight to Ko Samui from Washington, D.C. Reagan-National Airport in the past 72 hours is $581. The best round-trip flight deal from Washington, D.C. Reagan-National Airport to Ko Samui found on momondo in the last 72 hours is $1,243.

The fastest flight from Washington, D.C. Reagan-National Airport to Ko Samui takes 25h 20m

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.

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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. 25h 20m 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.

Ko Tao

Ko Pha Ngan

Khanom

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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.

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Cheap flights from Washington, D.C. Reagan-National Airport to Ko Samui from $581

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Cathay Pacific flights from Washington, D.C. Reagan-National Airport to Ko Samui

Our best Cathay Pacific deals on Washington, D.C. Reagan-National Airport to Ko Samui flight tickets

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

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

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

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

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

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

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

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

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List of cabin classes available on flights landing in Ko Samui. Availability may vary depending on flight origin and airline.

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