IAD - USM

$709 Find Cheap Flights from Washington Dulles Airport to Ko Samui

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Ko Samui departing on 8/14. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Ko Samui

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Ko Samui, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Ko Samui, as well as popular online travel agencies
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Flights Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Ko Samui that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Dulles Intl to Ko Samui

Fri, Sep 5 - Fri, Sep 12
Turkish Airlines Logo
9:40 pm - 8:15 amIAD-USM
23h 35m2 stops
Turkish Airlines Logo
7:00 pm - 11:45 amUSM-IAD
27h 45m2 stops
$1,165Turkish Airlines
Find Deal
Sat, Nov 29 - Sun, Jan 25
Turkish Airlines Logo
12:55 pm - 6:25 pmIAD-USM
41h 30m2 stops
Turkish Airlines Logo
7:55 am - 11:10 amUSM-IAD
39h 15m2 stops
$1,243Turkish Airlines
Find Deal
Sat, Nov 29 - Mon, Jan 26
Logo
9:10 pm - 8:45 pmIAD-USM
35h 35m2 stops
Logo
7:00 am - 7:15 pmUSM-IAD
48h 15m2 stops
$1,249
Find Deal
Sat, Nov 29 - Mon, Jan 26
Logo
8:05 pm - 8:45 pmIAD-USM
36h 40m2 stops
Logo
7:00 am - 3:55 pmUSM-IAD
68h 55m2 stops
$1,308
Find Deal
Sat, Nov 29 - Mon, Jan 26
Turkish Airlines Logo
9:10 pm - 6:25 pmIAD-USM
33h 15m2 stops
Turkish Airlines Logo
2:05 pm - 11:10 amUSM-IAD
33h 05m2 stops
$1,311Turkish Airlines
Find Deal
Sat, Nov 29 - Mon, Jan 26
Turkish Airlines Logo
9:10 pm - 6:25 pmIAD-USM
33h 15m2 stops
Turkish Airlines Logo
2:05 pm - 11:10 amUSM-IAD
33h 05m2 stops
$1,322Turkish Airlines
Find Deal
Sat, Nov 29 - Fri, Jan 30
Emirates Logo
10:30 am - 2:55 pmIAD-USM
40h 25m2 stops
Emirates Logo
7:55 am - 8:10 amUSM-IAD
36h 15m2 stops
$1,480Emirates
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Thu, Oct 30 - Mon, Dec 29
Qatar Airways Logo
9:05 pm - 10:40 amIAD-USM
50h 35m2 stops
Qatar Airways Logo
12:30 pm - 3:55 pmUSM-IAD
39h 25m2 stops
$1,808Qatar Airways
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Sat, Jul 26 - Sat, Aug 2
Qatar Airways Logo
9:00 pm - 10:30 amIAD-USM
26h 30m2 stops
Qatar Airways Logo
6:55 pm - 3:40 pmUSM-IAD
31h 45m2 stops
$1,817Qatar Airways
Find Deal
Sat, Nov 29 - Sun, Jan 25
SWISS Logo
10:15 pm - 3:35 pmIAD-USM
29h 20m3 stops
SWISS Logo
4:25 pm - 3:30 pmUSM-IAD
35h 05m2 stops
$2,510SWISS
Find Deal
Expert advice

Expert advice for your flight from Dulles Intl to Ko Samui

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Sun Country Air

Sun Country's Best seats offer 34 inches of legroom and preferred boarding.


Sun Country's app provides easy check-in and mobile boarding passes for convenience.

Read more about Sun Country Airby Daniel Scheffler
Delta

Delta One offers lie-flat seats with privacy doors on select aircraft for enhanced comfort.


Delta passengers get free checked bags with premium cabin tickets or Delta credit cards.

Read more about Deltaby Stefanie Waldek
United Airlines

United Polaris offers lie-flat seats with aisle access for long-haul comfort.


United's Polaris Lounges offer a luxurious experience with restaurants and less crowding.

Read more about United Airlinesby Stefanie Waldek
Our travel experts
Daniel Scheffler

Daniel Scheffler

Expert on Sun Country Air

Daniel Scheffler

Daniel Scheffler

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.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on Delta and United Airlines

Stefanie Waldek

Stefanie Waldek

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.

Read more
Useful Info

KAYAK's insights & trends for Dulles Intl to Ko Samui flights

Get data-powered insights and trends into flights from Dulles Intl to Ko Samui to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Washington Dulles Airport to Ko Samui?

The average price of all round-trip flights from Washington, D.C. Dulles Intl Airport to Ko Samui clicked on KAYAK for each day over the last 12 months.

When flying from Washington Dulles Airport to Ko Samui, you should consider leaving on a Thursday and avoid Saturdays if you are looking for the best rates. For your return to Washington Dulles Airport, you’ll find the best rates on Wednesdays and the most expensive ones on Saturdays.

Find deals

Good to know

Cheapest flight$709
Flight from Washington Dulles 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.

FAQs for booking Washington Dulles Airport to Ko Samui flights

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to Ko Samui?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Ko Samui was $709 for a one-way ticket and $1,165 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Ko Samui?

    Yes

  • Which airports will I be using when flying from Washington Dulles Airport to Ko Samui?

    Washington Dulles Airport and Ko Samui are both served by 1 main airport. You will leave Washington Dulles Airport from Washington, D.C. Dulles Intl and will be arriving at Ko Samui.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Ko Samui?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington Dulles Airport to Ko Samui?

    oneworld, and Star Alliance are the airline alliances operating flights between Washington Dulles Airport and Ko Samui, with Star Alliance being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Ko Samui?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington Dulles Airport to Ko Samui.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to Ko Samui?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ko Samui from Washington Dulles Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington Dulles Airport to Ko Samui?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ko Samui with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and USM can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to Ko Samui?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ko Samui from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from Dulles Intl to Ko Samui

Information on your arrival and departure airports

Washington Dulles Airport (IAD)
Ko Samui (USM)

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