CA $906 Cheap Flights from Washington (IAD) to Samui Intl. Airport (USM)

View CA $906 flight on Tue, Oct. 21, 2025Opens in a new window

Popular airlines from Washington Dulles International Airport (IAD) to Samui Intl. Airport (USM)

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Cheap flights from Washington (IAD) to Samui Intl. Airport (USM)

Prices were available within the past 7 days and start at CA $906 for one-way flights and CA $1,833 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Turkish Airlines
Tue, Oct. 21 - Tue, Oct. 28
IAD
Washington
USM
Koh Samui
CA $1,833 Roundtrip, found 2 hours ago
CA $1,833
Roundtrip
found 2 hours ago
Select Turkish Airlines flight, departing Tue, Oct. 21 from Washington to Koh Samui, returning Tue, Oct. 28, priced at CA $1,833 found 2 hours ago
Turkish Airlines
Tue, Oct. 21 - Tue, Oct. 28
IAD
Washington
USM
Koh Samui
CA $1,914 Roundtrip, found 2 hours ago
CA $1,914
Roundtrip
found 2 hours ago
Select Turkish Airlines flight, departing Tue, Oct. 21 from Washington to Koh Samui, returning Tue, Oct. 28, priced at CA $1,914 found 2 hours ago
Qatar Airways
Tue, Oct. 21 - Tue, Oct. 28
IAD
Washington
USM
Koh Samui
CA $1,919 Roundtrip, found 2 hours ago
CA $1,919
Roundtrip
found 2 hours ago
Select Qatar Airways flight, departing Tue, Oct. 21 from Washington to Koh Samui, returning Tue, Oct. 28, priced at CA $1,919 found 2 hours ago
Turkish Airlines
Tue, Oct. 21 - Tue, Oct. 28
IAD
Washington
USM
Koh Samui
CA $1,923 Roundtrip, found 2 hours ago
CA $1,923
Roundtrip
found 2 hours ago
Select Turkish Airlines flight, departing Tue, Oct. 21 from Washington to Koh Samui, returning Tue, Oct. 28, priced at CA $1,923 found 2 hours ago
Qatar Airways
Tue, Oct. 21 - Tue, Oct. 28
IAD
Washington
USM
Koh Samui
CA $1,949 Roundtrip, found 2 hours ago
CA $1,949
Roundtrip
found 2 hours ago
Select Qatar Airways flight, departing Tue, Oct. 21 from Washington to Koh Samui, returning Tue, Oct. 28, priced at CA $1,949 found 2 hours ago
Turkish Airlines
Tue, Oct. 21 - Tue, Oct. 28
IAD
Washington
USM
Koh Samui
CA $1,984 Roundtrip, found 2 hours ago
CA $1,984
Roundtrip
found 2 hours ago
Select Turkish Airlines flight, departing Tue, Oct. 21 from Washington to Koh Samui, returning Tue, Oct. 28, priced at CA $1,984 found 2 hours ago
Turkish Airlines
Tue, Oct. 21 - Tue, Oct. 28
IAD
Washington
USM
Koh Samui
CA $2,003 Roundtrip, found 2 hours ago
CA $2,003
Roundtrip
found 2 hours ago
Select Turkish Airlines flight, departing Tue, Oct. 21 from Washington to Koh Samui, returning Tue, Oct. 28, priced at CA $2,003 found 2 hours ago
Qatar Airways
Tue, Oct. 21 - Tue, Oct. 28
IAD
Washington
USM
Koh Samui
CA $2,009 Roundtrip, found 2 hours ago
CA $2,009
Roundtrip
found 2 hours ago
Select Qatar Airways flight, departing Tue, Oct. 21 from Washington to Koh Samui, returning Tue, Oct. 28, priced at CA $2,009 found 2 hours ago
Turkish Airlines
Tue, Oct. 21 - Tue, Oct. 28
IAD
Washington
USM
Koh Samui
CA $2,023 Roundtrip, found 2 hours ago
CA $2,023
Roundtrip
found 2 hours ago
Select Turkish Airlines flight, departing Tue, Oct. 21 from Washington to Koh Samui, returning Tue, Oct. 28, priced at CA $2,023 found 2 hours ago
Etihad Airways
Tue, Oct. 21 - Tue, Oct. 28
IAD
Washington
USM
Koh Samui
CA $2,084 Roundtrip, found 2 hours ago
CA $2,084
Roundtrip
found 2 hours ago
Select Etihad Airways flight, departing Tue, Oct. 21 from Washington to Koh Samui, returning Tue, Oct. 28, priced at CA $2,084 found 2 hours ago
Emirates
Tue, Oct. 21 - Tue, Oct. 28
IAD
Washington
USM
Koh Samui
CA $2,175 Roundtrip, found 2 hours ago
CA $2,175
Roundtrip
found 2 hours ago
Select Emirates flight, departing Tue, Oct. 21 from Washington to Koh Samui, returning Tue, Oct. 28, priced at CA $2,175 found 2 hours ago
Ethiopian Airlines
Tue, Oct. 21 - Tue, Oct. 28
IAD
Washington
USM
Koh Samui
CA $2,218 Roundtrip, found 2 hours ago
CA $2,218
Roundtrip
found 2 hours ago
Select Ethiopian Airlines flight, departing Tue, Oct. 21 from Washington to Koh Samui, returning Tue, Oct. 28, priced at CA $2,218 found 2 hours ago
Flight from Washington to Samui Intl. Airport (IAD - USM) route information
Origin airport
Washington Dulles Intl.
Destination airport
Samui Intl. Airport
Roundtrip price
CA $1,832
Distance
14530 km

Chantilly to Koh Samui Flights

The easy way to book your flights from Washington to Samui Intl. Airport 

With Expedia, it’s simple to find and book flights to Samui Intl. Airport from Washington whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Samui Intl. Airport, too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Washington to Samui Intl. Airport today, tomorrow, or this week.  

 

Save dollars with cheap flights from Washington Dulles Intl., IAD to Samui Intl. Airport, USM 

Sort your search results by price to find great deals on your flight from Washington to Samui Intl. Airport—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Samui Intl. Airport from Washington currently is just CA $1,833 rising to CA $2,218.  

Here are more money-saving tips: 

  • Fly in October when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Samui Intl. Airport  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Samui Intl. Airport from Washington 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Samui Intl. Airport with Expedia today.

Frequently asked questions

How much is a flight from Washington Dulles Intl. Airport (IAD) to USM?
Start packing your bags, because round-trip flights between IAD and Ko Samui Airport start from CA $1,833. That's based on fares listed within the last 7 days on Expedia for flights departing within the next year. Prices can increase quickly, so book now to lock in the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Dulles Intl. Airport to Ko Samui Airport (USM)?
The majority of flights can be cancelled online, but every airline has its own terms and conditions. If you do need to cancel your flight, check out our Customer Service Portal and follow the instructions.
How do I find cheap flights from Washington Dulles Intl. Airport (IAD) to Ko Samui Airport that have flexible change policies?
Plenty of airlines offer the option to reschedule your flight at no extra charge. All you pay is the fare difference. When looking for Washington Dulles Intl. Airport (IAD) to Ko Samui Airport (USM) flights, you'll see a "No change fees" box for you to select.
How far is the flight from Dulles Intl. Airport to Ko Samui Airport (USM)?
The distance is around 14,600 kilometres, so fill your carry-on bag with everything you need to make your journey comfortable. Wondering what to take on board your Chantilly to Koh Samui flight? A sleep mask, earplugs and a neck pillow are among the essentials.
Which airlines fly direct from Dulles Intl. Airport to USM?
At the moment, no airlines offer direct flights from Dulles Intl. Airport to USM. You'll need to book a flight with one or more stops. To get the best price and connections, lock in your airfare ahead of time.
Are Dulles Intl. Airport to USM flight tickets cheaper when they're purchased at the last minute?
Flight prices are constantly going up and down, so not always. While last-minute flight deals between Washington Dulles Intl. Airport (IAD) and Ko Samui Airport are possible, it's also a good idea to keep track of prices well before you fly. In fact, some carriers publish their prices up to a year before the departure date. Expedia is constantly updating the biggest bargains around, so keep checking and be ready to grab your seat when the fares dip.

Explore a world of travel with Expedia

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