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Koh Samui

$1,012+ 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — USM
Dec 25 — Jan 11
Wed 12/25
Wed 1/1
1 adult, Economy
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Find cheap flights from Dulles Intl to Koh Samui with Cheapflights

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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 December 20, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,361
(SmartFares)
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Ko Samui flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Ko Samui flights.
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From Washington, D.C. Dulles Intl to Ko Samui
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Find flight deals from Dulles Intl to Koh Samui

Best flights from Dulles Intl to Koh Samui
Discover carefully curated flight deals from Dulles Intl to Koh Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 20, 2024.

This SmartFares deal was found by Cheapflights users on 12/19. 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.
Wed 1/158:05 pmIAD - USM
2 stops35h 30mMultiple Airlines
Tue 1/218:15 amUSM - IAD
2 stops67h 40mMultiple Airlines
Deal found 12/19$1,361

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 December 20, 2024.

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Depart

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Price

Washington, D.C.Koh Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Thu 3/20

3:00 pm-7:40 am

2 stops29h 40m

Ko Samui

Wed 3/26

9:25 pm-8:30 pm

2 stops34h 05m

$1,318

Washington, D.C.Koh Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Wed 1/15

8:05 pm-7:35 pm

2 stops35h 30m

Ko Samui

Tue 1/21

8:15 am-3:55 pm

2 stops67h 40m

$1,361

Washington, D.C.Koh Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Fri 5/9

9:05 pm-1:55 pm

2 stops29h 50m

Ko Samui

Mon 7/7

8:00 am-8:45 am

2 stops35h 45m

$1,503

Washington, D.C.Koh Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Tue 6/17

10:55 am-4:55 pm

2 stops43h 00m

Ko Samui

Fri 7/4

5:55 pm-8:40 am

2 stops49h 45m

$1,888

Washington, D.C.Koh Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Thu 5/8

9:05 pm-2:40 pm

2 stops30h 35m

$1,012

Washington, D.C.Koh Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Thu 5/8

7:00 am-6:20 pm

3 stops48h 20m

$1,516

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/19

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 December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*2 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).

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.

  • 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.

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