Koh Samui

$610+ Cheap flights from Dulles Intl (IAD) to Koh Samui (USM)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — USM
janv. 21 — janv. 281
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Cheap flight deals from Dulles Intl to Koh Samui

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Koh Samui (USM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated janvier 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,311
(FlightHub)

One-way from

$614
(Kiwi.com)
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Ko Samui flight deals.
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Ko Samui flights.
From Washington, D.C. Dulles Intl to Ko Samui
One-way flight from Washington, D.C. Dulles Intl to Ko Samui

Find flight deals from Dulles Intl to Koh Samui

Cheapest flights from Dulles Intl to Koh Samui
Explore the most affordable flight options available from Dulles Intl to Koh Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on janvier 16, 2025.

This FlightHub deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 3/239:05 pmIAD - USM
2 stops26h 35mQatar Airways
dim. 4/135:55 pmUSM - IAD
2 stops33h 15mQatar Airways
Deal found 1/15$1,311
This SmartFares deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 2/128:05 pmIAD - USM
2 stops35h 30mMultiple Airlines
mar. 2/188:15 amUSM - IAD
2 stops36h 05mMultiple Airlines
Deal found 1/15$1,361
This FlightHub deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/175:00 pmIAD - USM
3 stops65h 10mSingapore Airlines
ven. 7/44:25 pmUSM - IAD
2 stops42h 24mSingapore Airlines
Deal found 1/16$2,616
This Emirates deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 3/210:30 amIAD - USM
2 stops33h 40mEmirates
dim. 3/91:25 pmUSM - IAD
2 stops30h 35mEmirates
Deal found 1/16$3,248

Find flights from Dulles Intl to Koh Samui within your budget

Customize your flight search to find flights from Dulles Intl to Koh Samui that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated janvier 16, 2025.

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Route

Depart

Return

Price

Washington, D.C.Koh Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

dim. 3/23

9:05 pm-10:40 am

2 stops26h 35m

Ko Samui

dim. 4/13

5:55 pm-4:10 pm

2 stops33h 15m

$1,311

Washington, D.C.Koh Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

mer. 2/12

8:05 pm-7:35 pm

2 stops35h 30m

Ko Samui

mar. 2/18

8:15 am-8:20 am

2 stops36h 05m

$1,361

Washington, D.C.Koh Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

mar. 6/17

5:00 pm-9:10 pm

3 stops65h 10m

Ko Samui

ven. 7/4

4:25 pm-11:49 pm

2 stops42h 24m

$2,616

Washington, D.C.Koh Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

dim. 3/2

10:30 am-8:10 am

2 stops33h 40m

Ko Samui

dim. 3/9

1:25 pm-8:00 am

2 stops30h 35m

$3,248

Washington, D.C.Koh Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

dim. 3/2

9:30 pm-8:00 am

3 stops46h 30m

$610

Washington, D.C.Koh Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

jeu. 2/27

8:05 pm-6:25 pm

2 stops34h 20m

$729

Washington, D.C.Koh Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

jeu. 2/27

10:30 am-6:15 pm

2 stops43h 45m

$1,531

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

Compare providers for flights from Dulles Intl to Koh Samui

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Koh Samui in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Koh Samui flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Koh Samui flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Koh Samui flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Koh Samui flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Koh Samui flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to Koh Samui

Have a flexible travel schedule? Discover the best time to fly to Koh Samui from Dulles Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Dulles Intl to Koh Samui

Get recent, data-driven insights about flights from Dulles Intl to Koh Samui including ideal travel times, pricing trends, and more.

Rainfall in Koh Samui by month

Plan your trip to Koh Samui by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Koh Samui ranges from 2.3 - 19.3 inches per month. November is typically the wettest month, when rainfall can reach 19.3 in. February is typically the driest time to visit Koh Samui when rainfall is around 2.3 in.

Temperature in Koh Samui by month

Plan your trip to Koh Samui by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Koh Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 80.6 F).

Reviews of airlines servicing Koh Samui

Get insights into the airlines that provide service to Koh Samui. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Koh Samui. Reviews last updated janvier 16, 2025.
8.1
Very good
3,350 reviews

Entertainment

8.2

Food

7.9

Overall

8.1

Comfort

8.0

Crew

8.3

Boarding

8.1

Reviews

1 / 10

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.

8.1
Very good
3,350 reviews
8.1
Very good
3,350 reviews

Entertainment

8.2

Food

7.9

Overall

8.1

Comfort

8.0

Crew

8.3

Boarding

8.1

Reviews

1 / 10

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.

8.1
Very good
1,327 reviews
8.1
Very good
3,350 reviews

Entertainment

8.2

Food

7.9

Overall

8.1

Comfort

8.0

Crew

8.3

Boarding

8.1

Reviews

1 / 10

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.

7.5
Good
3,752 reviews
8.1
Very good
3,350 reviews

Entertainment

8.2

Food

7.9

Overall

8.1

Comfort

8.0

Crew

8.3

Boarding

8.1

Reviews

1 / 10

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Koh Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly into for flights to Koh Samui from Washington, D.C. Dulles Intl?

    Located just 2.1 mi from the city center, Ko Samui is the airport most travelers will use when flying to Koh Samui from Washington, D.C. Dulles Intl. Booking flights from Washington, D.C. Dulles Intl to Ko Samui (USM) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. Dulles Intl from 0 different airlines.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Koh Samui round-trip?

    Cheapflights users have booked flights from Washington, D.C. Dulles Intl Airport to Koh Samui round-trip from $1,311. Other airlines that can offer you cheap pricing are Singapore Airlines, from $2,821, and Emirates, from $3,248.

  • Can I find deals for flights from Dulles Intl to Koh Samui that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Koh Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Koh Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Koh Samui.

  • Can I find deals for business class flights from Dulles Intl to Koh Samui?

    Yes. Cheapflights offers flight deals from Dulles Intl to Koh Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Ko Pha Ngan
Ko Tao

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