$695 CHEAP FLIGHTS from Reagan Washington to Ko Samui (DCA - USM) | KAYAK

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Flight Deals

Cheap Flights from Reagan-National to Ko Samui (DCA-USM)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Recent round-trip flight deals from Reagan-National to Ko Samui

Mon, Apr 5 - Fri, Apr 16

1:05 pm - 7:40 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

43h 35m2 stops Chicago O'Hare Intl Hong Kong Intl

11:55 am - 3:52 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

38h 57m2 stops Hong Kong Intl Los Angeles

$1,218Multiple Airlines

Sun, Nov 8 - Mon, Nov 16

10:11 am - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

45h 24m2 stops Chicago O'Hare Intl Hong Kong Intl

11:40 am - 9:59 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

46h 19m2 stops Hong Kong Intl Seattle/Tacoma Intl

$1,223Cathay Pacific

Sun, Nov 8 - Wed, Nov 18

10:11 am - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

45h 24m2 stops Chicago O'Hare Intl Hong Kong Intl

11:40 am - 6:04 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

42h 24m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,257Cathay Pacific

Mon, Nov 9 - Mon, Nov 16

10:11 am - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

45h 24m2 stops Chicago O'Hare Intl Hong Kong Intl

11:40 am - 6:04 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

42h 24m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,264Cathay Pacific

Sun, Nov 8 - Sun, Nov 15

10:11 am - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

45h 24m2 stops Chicago O'Hare Intl Hong Kong Intl

11:40 am - 6:04 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

42h 24m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,272Multiple Airlines

Sat, Nov 7 - Mon, Nov 16

10:11 am - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

45h 24m2 stops Chicago O'Hare Intl Hong Kong Intl

11:40 am - 9:59 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

46h 19m2 stops Hong Kong Intl Seattle/Tacoma Intl

$1,273Cathay Pacific

Mon, Nov 9 - Tue, Nov 17

10:11 am - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

45h 24m2 stops Chicago O'Hare Intl Hong Kong Intl

11:40 am - 6:04 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

42h 24m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,304Cathay Pacific

Sat, Mar 13 - Wed, Mar 24

10:19 am - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

45h 16m2 stops Chicago O'Hare Intl Hong Kong Intl

11:40 am - 7:18 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

42h 38m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,307Cathay Pacific

Wed, Mar 10 - Mon, Mar 22

10:19 am - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

45h 16m2 stops Chicago O'Hare Intl Hong Kong Intl

11:40 am - 9:59 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

45h 19m2 stops Hong Kong Intl Seattle/Tacoma Intl

$1,321Cathay Pacific

Fri, Jan 15 - Sun, Jan 24

6:00 am - 7:35 pmDCA Washington, D.C. Reagan-National-USM Ko Samui

25h 35m2 stops New York John F Kennedy Intl Hong Kong Intl

11:40 am - 6:03 pmUSM Ko Samui-DCA Washington, D.C. Reagan-National

42h 23m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,322Multiple Airlines

Booking Insights

Price, demand and travel trends for Washington, D.C. Reagan-National Airport to Ko Samui flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Which airline is the cheapest to fly from Washington, D.C. Reagan-National Airport to Ko Samui?: Cathay Pacific ($1,223) offered the cheapest round-trip ticket from Washington, D.C. Reagan-National Airport to Ko Samui in the last 5 days.

Expert advice

Our travel experts

Harriet Baskas

Harriet Baskas

Expert on American Airlines and JetBlue

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Stefanie Waldek

Stefanie Waldek

Expert on Delta

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.

Cheapest flight	$695

One-way flight from Washington, D.C. Reagan-National Airport to Ko Samui

When to book flights from Reagan-National to Ko Samui

Are your dates flexible? Find out the best times to travel from Reagan-National 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.

Do I need a passport to fly from Washington, D.C. Reagan-National Airport to Ko Samui?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
Have flight prices from Washington, D.C. Reagan-National Airport to Ko Samui changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,218 to $8,555. That means the highest observed fare was about 7x higher than the lowest one.
What car rental options are available at Ko Samui Airport (USM)?
Ko Samui Airport (USM) hosts 5 major car rental companies, with daily rates starting from around $13 for economy cars. Top options include:

• Drive Car Rental
• Alamo
• Sixt
• Enterprise Rent-A-Car
• Thai Rent
Which airports can I use when flying from Washington, D.C. Reagan-National Airport to Ko Samui?
Flights from Washington, D.C. Reagan-National Airport to Ko Samui usually depart from Washington, D.C. Reagan-National (DCA) and arrive at Ko Samui (USM).
What is the time difference between Washington, D.C. Reagan-National Airport and Ko Samui?
Ko Samui is 11 hours ahead of Washington, D.C. Reagan-National Airport (Indochina Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.
What popular places can I visit in Ko Samui?
Some of the most popular sights in Ko Samui are Lamai Beach, Chaweng Beach and Bophut Beach. These are among the most viewed places in Ko Samui on KAYAK.

If you're arriving late at night and need somewhere to stay, check out these hotels close to Ko Samui Airport.

• Ozo Chaweng Samui - Sha Extra Plus
• Melia Koh Samui
• Amari Koh Samui

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