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

According to our data, American Airlines have had the least number of delays on this route over the last 12 months; with about 22% of their flights experiencing any sort of delay.

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.

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

Historically, on average around 24% 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 131 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.

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.

$1,774 Cheap Flights from Washington, D.C. Reagan-National Airport to Ko Samui in 2026

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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.

8:40 pm - 12:45 pm

DCA

USM

29h 05m

3 stops

11:55 am - 8:52 am

USM

DCA

31h 57m

2 stops

$1,925Multiple Airlines

Thu, Jun 11 - Wed, Jun 17

8:40 pm - 12:45 pm

DCA

USM

29h 05m

3 stops

11:55 am - 8:53 am

USM

DCA

31h 58m

2 stops

$1,928Multiple Airlines

Sun, Jun 7 - Sat, Jun 13

8:40 pm - 7:40 pm

DCA

USM

36h 00m

2 stops

11:55 am - 8:53 am

USM

DCA

31h 58m

2 stops

$1,929Multiple Airlines

Sun, Jun 7 - Sat, Jun 13

8:40 pm - 12:45 pm

DCA

USM

29h 05m

3 stops

6:00 am - 10:28 pm

USM

DCA

27h 28m

3 stops

$2,028Multiple Airlines

Thu, Jun 11 - Wed, Jun 17

8:40 pm - 7:40 pm

DCA

USM

36h 00m

2 stops

11:55 am - 8:52 am

USM

DCA

31h 57m

2 stops

$2,081Multiple Airlines

Thu, Jun 11 - Wed, Jun 17

11:35 am - 7:40 pm

DCA

USM

45h 05m

2 stops

11:55 am - 8:59 pm

USM

DCA

44h 04m

2 stops

$2,108Cathay Pacific

Sat, Jun 27 - Wed, Jul 8

10:14 am - 7:40 pm

DCA

USM

46h 26m

2 stops

11:55 am - 9:00 pm

USM

DCA

44h 05m

2 stops

$2,117Cathay Pacific

Sat, May 30 - Fri, Jun 5

2:59 pm - 7:40 pm

DCA

USM

41h 41m

2 stops

11:55 am - 12:44 pm

USM

DCA

35h 49m

2 stops

$2,251Cathay Pacific

Sat, May 30 - Fri, Jun 5

8:40 pm - 7:40 pm

DCA

USM

36h 00m

2 stops

9:15 am - 8:52 am

USM

DCA

34h 37m

3 stops

$2,329Multiple Airlines

Fri, Jul 3 - Fri, Jul 10

6:59 pm - 7:40 pm

DCA

USM

61h 41m

2 stops

11:55 am - 4:29 pm

USM

DCA

39h 34m

2 stops

$2,461Cathay Pacific

Fri, Jul 3 - Fri, Jul 10

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

Sep 8

DCA6:59 pmWashington, D.C. Reagan-National

37h 41m

2 stops

USM7:40 pmKo Samui

Sep 12

USM11:55 amKo Samui

41h 04m

2 stops

DCA5:59 pmWashington, D.C. Reagan-National

$1,774

Cathay Pacific

Jun 27

DCA11:35 amWashington, D.C. Reagan-National

45h 05m

2 stops

USM7:40 pmKo Samui

Jul 8

USM11:55 amKo Samui

44h 04m

2 stops

DCA8:59 pmWashington, D.C. Reagan-National

$2,108

Cathay Pacific

May 30

DCA10:14 amWashington, D.C. Reagan-National

46h 26m

2 stops

USM7:40 pmKo Samui

Jun 5

USM11:55 amKo Samui

44h 05m

2 stops

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

$2,117

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 - USM

DCAUSM

Washington, D.C. Reagan-National

Thu 6/11

8:40 pm-12:45 pm

3 stops29h 05m

Ko Samui

Wed 6/17

11:55 am-8:52 am

2 stops31h 57m

$1,925

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Sun 6/7

8:40 pm-12:45 pm

3 stops29h 05m

Ko Samui

Sat 6/13

11:55 am-8:53 am

2 stops31h 58m

$1,928

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Sun 6/7

8:40 pm-7:40 pm

2 stops36h 00m

Ko Samui

Sat 6/13

11:55 am-8:53 am

2 stops31h 58m

$1,929

Quickest round-trip

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Thu 6/11

8:40 pm-12:45 pm

3 stops29h 05m

Ko Samui

Wed 6/17

6:00 am-10:28 pm

3 stops27h 28m

$2,028

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Thu 6/11

8:40 pm-7:40 pm

2 stops36h 00m

Ko Samui

Wed 6/17

11:55 am-8:52 am

2 stops31h 57m

$2,081

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Sat 6/27

11:35 am-7:40 pm

2 stops45h 05m

Ko Samui

Wed 7/8

11:55 am-8:59 pm

2 stops44h 04m

$2,108

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Sat 5/30

10:14 am-7:40 pm

2 stops46h 26m

Ko Samui

Fri 6/5

11:55 am-9:00 pm

2 stops44h 05m

$2,117

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Sat 5/30

2:59 pm-7:40 pm

2 stops41h 41m

Ko Samui

Fri 6/5

11:55 am-12:44 pm

2 stops35h 49m

$2,251

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Fri 7/3

8:40 pm-7:40 pm

2 stops36h 00m

Ko Samui

Fri 7/10

9:15 am-8:52 am

3 stops34h 37m

$2,329

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Fri 7/3

6:59 pm-7:40 pm

2 stops61h 41m

Ko Samui

Fri 7/10

11:55 am-4:29 pm

2 stops39h 34m

$2,461

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 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

Fastest flight time	36h 00m
Direct flights	None

The fastest flight from Washington, D.C. Reagan-National Airport to Ko Samui takes 36h 00m

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. 36h 00m 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 Pha Ngan

Ko Tao

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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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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