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

Flights from Washington, D.C. Dulles Intl Airport to Ko Samui usually depart from Washington, D.C. Dulles Intl (IAD) and arrive at Ko Samui (USM).

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

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

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

Yes. Flexible dates can save you up to 30% on flights from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport 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 are flight prices from Washington, D.C. Dulles Intl Airport to Ko Samui looking right now?

One-way fares from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport and Ko Samui?

Ko Samui is 11 hours ahead of Washington, D.C. Dulles Intl Airport (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. Dulles Intl Airport to Ko Samui flight?

Round-trip flights from Washington, D.C. Dulles Intl Airport 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.

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

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

$571 CHEAP FLIGHTS from Washington Dulles to Ko Samui (IAD - 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 Dulles Intl to Ko Samui (IAD-USM)

Cheap flights from Dulles Intl 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, Nov 21 - Sat, Nov 28

10:00 am - 3:35 pmIAD Washington, D.C. Dulles Intl-USM Ko Samui

41h 35m2 stops Addis Ababa Bole Bangkok Suvarnabhumi

8:20 pm - 8:00 amUSM Ko Samui-IAD Washington, D.C. Dulles Intl

47h 40m3 stops Bangkok Suvarnabhumi Addis Ababa Bole Rome Fiumicino

$1,174Multiple Airlines

Sat, Nov 21 - Sat, Nov 28

8:50 pm - 3:35 pmIAD Washington, D.C. Dulles Intl-USM Ko Samui

30h 45m3 stops Lome Addis Ababa Bole Bangkok Suvarnabhumi

9:30 pm - 8:00 amUSM Ko Samui-IAD Washington, D.C. Dulles Intl

46h 30m3 stops Bangkok Suvarnabhumi Addis Ababa Bole Rome Fiumicino

$1,174Multiple 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 - 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 - 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

Thu, Mar 11 - 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. Dulles Intl Airport to Ko Samui flights

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

Which airline is the cheapest to fly from Washington, D.C. Dulles Intl Airport to Ko Samui?: Qatar Airways ($1,209) offered the cheapest round-trip ticket from Washington, D.C. Dulles Intl Airport to Ko Samui in the last 5 days.

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Our travel experts

Daniel Scheffler

Expert on Sun Country Air

Daniel Scheffler is a travel writer, podcaster, and producer. Born in Africa, bred in Europe and now living in America he has traveled to 140 countries (and all 50 U.S. states). Plus he has stayed at over 2500 hotels across the globe. His original shows Everywhere and Without Maps (available on Spotify) showcase his beliefs, travel is about humanity and sharing that beauty. And thus it reminds you that you shouldn’t believe everything you think.

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Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Cheapest flight	$571

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

When to book flights from Dulles Intl to Ko Samui

Are your dates flexible? Find out the best times to travel from Dulles Intl 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. Dulles Intl Airport to Ko Samui?
Only Economy Class is available on flights from Washington, D.C. Dulles Intl Airport to Ko Samui.
Do I need a passport to fly from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport to Ko Samui flight?
Round-trip flights from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport 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 $9,806. That means the highest observed fare was about 8x higher than the lowest one.
How are flight prices from Washington, D.C. Dulles Intl Airport to Ko Samui looking right now?
One-way fares from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport to Ko Samui?
Flights from Washington, D.C. Dulles Intl Airport to Ko Samui usually depart from Washington, D.C. Dulles Intl (IAD) and arrive at Ko Samui (USM).
Can I save money by using flexible dates for flights from Washington, D.C. Dulles Intl Airport to Ko Samui?
Yes. Flexible dates can save you up to 30% on flights from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport and Ko Samui?
Ko Samui is 11 hours ahead of Washington, D.C. Dulles Intl Airport (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
• Lub d Koh Samui Chaweng Beach - Beachfront & Vibrant Social Vibe
• Amari Koh Samui

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IAD - USM

$571 Find Cheap Flights from Washington Dulles Airport to Ko Samui - Compare and Save

Everything you should know

Cheap Flights from Dulles Intl to Ko Samui (IAD-USM)

Cheap flights from Dulles Intl 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. Dulles Intl Airport to Ko Samui flights

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

Expert advice for your flight from Dulles Intl to Ko Samui

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

Cheapest flight

When to book flights from Dulles Intl to Ko Samui

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

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

More options for your flight from Dulles Intl 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 to Ko Samui

Find direct flights to and from Dulles Intl and Ko Samui

Flights from domestic origins to Ko Samui

Flights to other popular destinations