Which airports can I use when flying from Washington, D.C. to Ko Samui?

Flights from Washington, D.C. to Ko Samui may depart from several airports in Washington, D.C. area, including Washington, D.C. Reagan-National (DCA) and Washington, D.C. Dulles Intl (IAD). Flights usually arrive at Ko Samui (USM).

What cabin classes can I book on flights from Washington, D.C. to Ko Samui?

Only Economy Class is available on flights from Washington, D.C. to Ko Samui.

Can I save money by using flexible dates for flights from Washington, D.C. to Ko Samui?

Yes. Flexible dates can save you up to 30% on flights from Washington, D.C. to Ko Samui. Tuesday is the cheapest departure day at $1,150 round-trip on average, while Thursday is the most expensive at $1,636, a difference of $486. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in Ko Samui?

Some of the most popular sights in Ko Samui are Lamai Beach, Chaweng Beach and Bophut Beach. These are among the most viewed places in Ko Samui on KAYAK.

Do I need a passport to fly from Washington, D.C. to Ko Samui?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Have flight prices from Washington, D.C. to Ko Samui changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,167 to $9,591. That means the highest observed fare was about 8x higher than the lowest one.

How are flight prices from Washington, D.C. to Ko Samui looking right now?

One-way fares from Washington, D.C. to Ko Samui are currently higher than usual. Average one-way flight prices are about $798, which is 18% above the typical average for this route.

What is the time difference between Washington, D.C. and Ko Samui?

Ko Samui is 11 hours ahead of Washington, D.C. (Indochina Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at Ko Samui Airport (USM)?

Ko Samui Airport (USM) hosts 5 major car rental companies, with daily rates starting from around $13 for economy cars. Top options include: • Drive Car Rental • Alamo • Sixt • Enterprise Rent-A-Car • Thai Rent

How much should I expect to pay for a Washington, D.C. to Ko Samui flight?

Round-trip flights from Washington, D.C. to Ko Samui range from $1,235 to $1,650, with an average of $1,461 over the past 12 months. Anything below $1,235 counts as a good deal.

What is the cheapest Washington, D.C. to Ko Samui flight route?

There's little price difference between Washington, D.C. to Ko Samui routes. They average around $1,461 round-trip, based on KAYAK data over the past 12 months.

Which airline is the cheapest to fly from Washington, D.C. to Ko Samui?

Qatar Airways ($1,209) offered the cheapest round-trip ticket from Washington, D.C. to Ko Samui in the last 5 days.

$571 CHEAP FLIGHTS from Washington, D.C. to Ko Samui (WAS - USM)

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Cheapest round-trip

$1,167

Typical prices: $1,235-$1,650

Multiple Airlines

Thu 11/8Thu 11/15

IAD - USM • 2 stops

Cheapest one-way

$571

Typical prices: $675-$675

Etihad Airways

Sat 1/27

IAD - USM • 2 stops

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We hope you love your trip to Ko Samui!

Cheap Flights from Washington, D.C. to Ko Samui (WAS-USM)

Cheap flights from Washington, D.C. to Ko Samui with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Round-trip

One-way

Sun, Nov 8 - Sun, Nov 15

2:25 pm - 6:25 pmIAD Washington, D.C. Dulles Intl-USM Ko Samui

40h 00m2 stops Abu Dhabi Zayed Intl Phuket City

10:20 am - 9:00 amUSM Ko Samui-IAD Washington, D.C. Dulles Intl

34h 40m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl

$1,167Multiple Airlines

Sat, Mar 13 - Sun, Mar 21

2:25 pm - 7:10 amIAD Washington, D.C. Dulles Intl-USM Ko Samui

28h 45m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi

3:35 pm - 10:00 amUSM Ko Samui-IAD Washington, D.C. Dulles Intl

29h 25m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl

$1,193Multiple Airlines

Thu, Mar 11 - Mon, Mar 22

2:25 pm - 7:10 amIAD Washington, D.C. Dulles Intl-USM Ko Samui

28h 45m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi

3:35 pm - 10:00 amUSM Ko Samui-IAD Washington, D.C. Dulles Intl

29h 25m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl

$1,198Multiple Airlines

Mon, Nov 9 - Mon, Nov 16

8:05 pm - 10:35 amIAD Washington, D.C. Dulles Intl-USM Ko Samui

26h 30m2 stops Doha Hamad Intl Bangkok Suvarnabhumi

8:30 pm - 3:55 pmUSM Ko Samui-IAD Washington, D.C. Dulles Intl

31h 25m2 stops Bangkok Suvarnabhumi Doha Hamad Intl

$1,209Qatar Airways

Wed, Mar 10 - Mon, Mar 22

8:05 pm - 10:35 amIAD Washington, D.C. Dulles Intl-USM Ko Samui

26h 30m2 stops Doha Hamad Intl Bangkok Suvarnabhumi

7:00 pm - 4:55 pmUSM Ko Samui-IAD Washington, D.C. Dulles Intl

32h 55m2 stops Phuket City Doha Hamad Intl

$1,209Multiple Airlines

Thu, Mar 11 - Tue, Mar 23

8:05 pm - 10:35 amIAD Washington, D.C. Dulles Intl-USM Ko Samui

26h 30m2 stops Doha Hamad Intl Bangkok Suvarnabhumi

7:00 pm - 4:55 pmUSM Ko Samui-IAD Washington, D.C. Dulles Intl

32h 55m2 stops Phuket City Doha Hamad Intl

$1,209Multiple Airlines

Wed, Mar 10 - Tue, Mar 23

8:05 pm - 10:35 amIAD Washington, D.C. Dulles Intl-USM Ko Samui

26h 30m2 stops Doha Hamad Intl Bangkok Suvarnabhumi

7:00 pm - 4:55 pmUSM Ko Samui-IAD Washington, D.C. Dulles Intl

32h 55m2 stops Phuket City Doha Hamad Intl

$1,209Multiple Airlines

Tue, Mar 9 - Mon, Mar 22

8:05 pm - 5:40 pmIAD Washington, D.C. Dulles Intl-USM Ko Samui

33h 35m2 stops Doha Hamad Intl Bangkok Suvarnabhumi

7:00 am - 4:55 pmUSM Ko Samui-IAD Washington, D.C. Dulles Intl

44h 55m2 stops Bangkok Suvarnabhumi Doha Hamad Intl

$1,215Qatar Airways

Tue, Mar 9 - Tue, Mar 23

8:05 pm - 5:40 pmIAD Washington, D.C. Dulles Intl-USM Ko Samui

33h 35m2 stops Doha Hamad Intl Bangkok Suvarnabhumi

7:00 am - 4:55 pmUSM Ko Samui-IAD Washington, D.C. Dulles Intl

44h 55m2 stops Bangkok Suvarnabhumi Doha Hamad Intl

$1,215Qatar Airways

Wed, Mar 10 - Fri, Mar 19

8:05 pm - 9:20 pmIAD Washington, D.C. Dulles Intl-USM Ko Samui

37h 15m2 stops Doha Hamad Intl Bangkok Suvarnabhumi

7:00 am - 4:55 pmUSM Ko Samui-IAD Washington, D.C. Dulles Intl

44h 55m2 stops Bangkok Suvarnabhumi Doha Hamad Intl

$1,215Qatar Airways

Price, demand and travel trends for Washington, D.C. to Ko Samui flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Prices

Airlines

What is the cheapest Washington, D.C. to Ko Samui flight route? KAYAK tracks online flight deals over the last 12 months and analyzes pricing trends to identify the best available fares.: There's little price difference between Washington, D.C. to Ko Samui routes. They average around $1,461 round-trip, based on KAYAK data over the past 12 months.

Find deals

Cheapest flight	$571

One-way flight from Washington, D.C. Dulles Intl Airport to Ko Samui

When to book flights from Washington, D.C. to Ko Samui

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Ko Samui based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

What cabin classes can I book on flights from Washington, D.C. to Ko Samui?
Only Economy Class is available on flights from Washington, D.C. to Ko Samui.
Do I need a passport to fly from Washington, D.C. to Ko Samui?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
How much should I expect to pay for a Washington, D.C. to Ko Samui flight?
Round-trip flights from Washington, D.C. to Ko Samui range from $1,235 to $1,650, with an average of $1,461 over the past 12 months. Anything below $1,235 counts as a good deal.
Have flight prices from Washington, D.C. to Ko Samui changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,167 to $9,591. That means the highest observed fare was about 8x higher than the lowest one.
How are flight prices from Washington, D.C. to Ko Samui looking right now?
One-way fares from Washington, D.C. to Ko Samui are currently higher than usual. Average one-way flight prices are about $798, which is 18% above the typical average for this route.
What car rental options are available at Ko Samui Airport (USM)?
Ko Samui Airport (USM) hosts 5 major car rental companies, with daily rates starting from around $13 for economy cars. Top options include:

• Drive Car Rental
• Alamo
• Sixt
• Enterprise Rent-A-Car
• Thai Rent
Which airports can I use when flying from Washington, D.C. to Ko Samui?
Flights from Washington, D.C. to Ko Samui may depart from several airports in Washington, D.C. area, including Washington, D.C. Reagan-National (DCA) and Washington, D.C. Dulles Intl (IAD). Flights usually arrive at Ko Samui (USM).
Can I save money by using flexible dates for flights from Washington, D.C. to Ko Samui?
Yes. Flexible dates can save you up to 30% on flights from Washington, D.C. to Ko Samui. Tuesday is the cheapest departure day at $1,150 round-trip on average, while Thursday is the most expensive at $1,636, a difference of $486.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
What is the time difference between Washington, D.C. and Ko Samui?
Ko Samui is 11 hours ahead of Washington, D.C. (Indochina Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.
What popular places can I visit in Ko Samui?
Some of the most popular sights in Ko Samui are Lamai Beach, Chaweng Beach and Bophut Beach. These are among the most viewed places in Ko Samui on KAYAK.

If your dates are flexible, aim for a Tuesday departure and avoid flying on Thursday. On this route, Tuesday flights average $1,150, about $486 less than Thursday fares (30% savings) based on the last 12 months.
If you're arriving late at night and need somewhere to stay, check out these hotels close to Ko Samui Airport.

• Ozo Chaweng Samui - Sha Extra Plus
• Amari Koh Samui
• Lub d Koh Samui Chaweng Beach - Beachfront & Vibrant Social Vibe

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WAS - USM

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Everything you should know

Cheap Flights from Washington, D.C. to Ko Samui (WAS-USM)

Cheap flights from Washington, D.C. to Ko Samui with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Price, demand and travel trends for Washington, D.C. to Ko Samui flights

What is the cheapest Washington, D.C. to Ko Samui flight route?

Which airline is the cheapest to fly from Washington, D.C. to Ko Samui?

Key details for Washington, D.C. to Ko Samui flights

Cheapest flight

When to book flights from Washington, D.C. to Ko Samui

Your Washington, D.C. to Ko Samui flight questions, answered

Your guide to booking Washington, D.C. to Ko Samui flights

More options for your flight from Washington, D.C. to Ko Samui

Complete your trip to Ko Samui with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from Washington, D.C. to Ko Samui

Find direct flights to and from Washington, D.C. and Ko Samui

Flights from domestic origins to Ko Samui

Flights to other popular destinations