Cheap Flights from Washington, D.C. to Samui International

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Flight deals from Washington, D.C. to Samui International Airport

Looking for a cheap last-minute deal or the best round-trip flight from Washington, D.C. to Samui International Airport? If you want to travel next month, round-trip fares start from $1,642. Find the lowest prices on one-way and round-trip tickets right here.

Koh Samui.$1,043 per passenger.Departing Tue, May 5, returning Tue, May 12.Round-trip flight with Etihad Airways and Bangkok Airways.Outbound indirect flight with Etihad Airways, departing from Washington Dulles on Tue, May 5, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departing from Samui International on Tue, May 12, arriving in Washington Dulles.Price includes taxes and charges.From $1,043, select.

Koh Samui.$1,650 per passenger.Departing Sun, Apr 5, returning Sat, Apr 11.Round-trip flight with Emirates and Bangkok Airways.Outbound indirect flight with Emirates, departing from Washington Dulles on Sun, Apr 5, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departing from Samui International on Sat, Apr 11, arriving in Washington Dulles.Price includes taxes and charges.From $1,650, select.

Koh Samui.$2,338 per passenger.Departing Sat, Mar 21, returning Wed, Apr 22.Round-trip flight with SWISS and Bangkok Airways.Outbound indirect flight with SWISS, departing from Washington Dulles on Sat, Mar 21, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departing from Samui International on Wed, Apr 22, arriving in Washington Dulles.Price includes taxes and charges.From $2,338, select.

Koh Samui.$4,128 per passenger.Departing Fri, Oct 9, returning Fri, Oct 30.Round-trip flight with Emirates.Outbound indirect flight with Emirates, departing from Washington Dulles on Fri, Oct 9, arriving in Samui International.Inbound indirect flight with Emirates, departing from Samui International on Fri, Oct 30, arriving in Washington Dulles.Price includes taxes and charges.From $4,128, select.

Find the cheapest month to fly from Washington, D.C. to Samui International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington, D.C. to Samui International flights are currently cheapest in May.

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Washington, D.C. to Samui International: Alternative routes

Compare routes from Washington, D.C. to Koh Samui below. You may find an airport to fly into that's cheaper, faster, or easier than Samui International.

Samui International

5km from central Koh Samui

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from $1,043

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Finding cheap flights from Washington, D.C. to Samui International: Frequently asked questions

How much are round-trip flights from Washington, D.C. to Samui International?

The best price we found for a round-trip flight from Washington, D.C. to Samui International is $1,043. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which airlines fly direct from Washington, D.C. to Samui International?

Currently, there are no airlines that fly direct from Washington, D.C. to Samui International. But we found flights with one stop from $1,043.

How many flights are there a week from Washington, D.C. to Samui International?

There are no flights flying from Washington, D.C. to Samui International, as of March 2026.

When is the cheapest time to fly from Washington, D.C. to Samui International?

The cheapest month to fly from Washington, D.C. to Samui International is usually May.

Which upcoming date is cheapest to fly from Washington, D.C. to Samui International Airport on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Washington, D.C. to Samui International Airport on Tuesday, May 5, 2026.

Can I get a direct flight from Washington, D.C. to Samui International Airport?

No airlines currently offer direct flights between Washington, D.C. and Samui International Airport. Most routes have one or more stops.

How can I find the best flight deal to Samui International?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Samui International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Koh Samui?

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Koh Samui is around 40 days in advance, so don’t leave your flight to the last minute.

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

The cheapest airline that flies to Samui International is Etihad Airways.

Traveling from Washington DC to Koh Samui Airport (USM): What you need to know

When planning your flight from Washington DC to Koh Samui Airport (USM), there's a good range of airports you can jet off from. Ronald Reagan National Airport (DCA), Washington Dulles International Airport (IAD) and Baltimore/Wash International Thurgood Marshall Airport (BWI) are Washington DC's main terminals.
The timezone in Koh Samui is UTC+7, which is 11 hours ahead of Washington DC. Koh Samui Airport is located in Koh Samui.
Arriving two hours before an international flight and one hour ahead of a domestic departure are tried-and-true travel tips. Be at the airport on time to board your flight from Washington DC to USM.
High season means busier airports, so show up even earlier. Give yourself at least two hours before a domestic flight and four hours for an international journey to stick to your schedule.

Airports in Washington DC

Ronald Reagan National Airport (DCA)

DCA is around 8 kilometers from central Washington DC. If you're ride-sharing, catching a cab or driving from the center, it'll take 15 minutes or so to get there, depending on traffic conditions. If you're taking public transport, expect the travel time to be around 45 minutes.
Booked an early flight from Washington DC to Koh Samui Airport? Avoid the stress of rushing to the terminal (and enjoy a few extra z's) by picking one of these stays near Ronald Reagan National Airport:
When it comes to Ronald Reagan National Airport's on-time performance, 76.44% of flights meet their scheduled arrival time.
You'll find DCA at 1 Aviation Circle.

Washington Dulles International Airport (IAD)

IAD is around 56 kilometers from central Washington DC. It'll take you 50 minutes or so to get to the airport by car from the city center. Public transport takes roughly 1 hour 10 minutes.
Want to treat yourself to an extra night away before boarding your Washington DC to USM flight? Check in to a hotel near Washington Dulles International Airport before your adventure officially begins. These stays have your key waiting:
Washington Dulles International Airport has an on-time performance of 74.39%. This figure sheds light on how frequently flights that take off from this airport land on time.
The street address for IAD is 1 Saarinen Circle.

Baltimore/Wash International Thurgood Marshall Airport (BWI)

BWI is around 48 kilometers from central Washington DC. Driving from the city center to the airport takes about 50 minutes. If you're considering public transport, you can expect a journey of around 1 hour 30 minutes.
Wake up, take it easy and still make your Washington DC to Koh Samui Airport flight with plenty of time to spare. These hotels near Baltimore/Wash International Thurgood Marshall Airport make it a breeze to get to the terminal if you're flying out early:
Flights that leave from BWI arrive at their final stop on schedule 77.13% of the time.

About Koh Samui Airport (USM)

If you're coming in on a late flight from Washington DC to Koh Samui Airport, few things beat the convenience of staying close to the terminal. Pick up your bags from the carousel and then be showered and sleeping soon after at one of these hotels near USM:
Grab a Koh Samui Airport rental car and explore Koh Samui and beyond with your own set of wheels. Asap car rental, Hertz and Drive Car Rental are leading providers to choose from here.
Lock in the lowest price by booking your ride around four weeks ahead of your Washington DC to Koh Samui Airport flight.

How to find the cheapest flights from Washington DC to Koh Samui Airport (USM)

$585 is the best price for a one-way ticket from Washington DC to Koh Samui Airport. Return flights start at $1,043. These prices may change based on availability.
To find cheap flights from Washington DC to USM, book early. Airlines typically offer lower fares when flights are first released.
Cheap Washington DC to Koh Samui Airport tickets are easier to find if you're not locked into specific dates. Use the 'Whole month' search function to compare fares across each month and then choose the cheapest day.
Spend less time searching for cheap plane tickets from Washington DC to USM by creating a Price Alert. We'll send you an email or notification through the app when a lower fare becomes available.
Lock in a cheap flight from Washington DC to Koh Samui Airport by using filters. Select your ideal times, number of stops and airlines, then sort the results by 'Cheapest' for the best deals.

Explore more of Thailand

You've done Koh Samui, now it's time to explore other corners of Thailand. Journey around 129 kilometers south to Nakhon Si Thammarat to tick off its must-visit sights. From Wat Phra Phrom to Wat Pho Sadet and Wat Yai Chai Mongkol, you'll have a packed itinerary ahead.
Around 257 kilometers south-west of Koh Samui, Phuket is another favorite stop in Thailand. Experience this destination's highlights firsthand at V.MarineTour- Phi Phi Islands Day Trip - Private Boat Charters, Sunrise Beach and Paradise Beach.