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 popular places can I visit in Ko Samui?

Some of the most popular sights in Ko Samui are Chaweng Beach, Lamai Beach, and Maenam Beach. These are among the most viewed places in Ko Samui on KAYAK.

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.

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.

Which car hire options are available at Ko Samui Airport (USM)?

Ko Samui Airport (USM) hosts 5 major car rental companies, with daily rates starting from around ฿427 for economy cars. Top options include: • Drive Car Rental • Alamo • Sixt • Enterprise Rent-A-Car • Thai Rent

Which airline is the cheapest to fly from Washington, D.C. Reagan-National Airport to Ko Samui?

Cathay Pacific (฿40,992) offered the cheapest return ticket from Washington, D.C. Reagan-National Airport to Ko Samui in the last 5 days.

฿23,295 CHEAP FLIGHTS from Reagan Washington to Ko Samui (DCA - USM)

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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.

Return

One-way

Recent return flight deals from Reagan-National to Ko Samui

Mon 5 Apr - Fri 16 Apr

13:05 - 19:40DCA Washington, D.C. Reagan-National-USM Ko Samui

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

11:55 - 15:52USM Ko Samui-DCA Washington, D.C. Reagan-National

38h 57m2 stops Hong Kong Intl Los Angeles

฿40,824Multiple Airlines

3+ days ago

Sun 8 Nov - Mon 16 Nov

10:11 - 19:35DCA Washington, D.C. Reagan-National-USM Ko Samui

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

11:40 - 21:59USM Ko Samui-DCA Washington, D.C. Reagan-National

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

฿40,992Cathay Pacific

3+ days ago

Sun 8 Nov - Wed 18 Nov

10:11 - 19:35DCA Washington, D.C. Reagan-National-USM Ko Samui

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

11:40 - 18:04USM Ko Samui-DCA Washington, D.C. Reagan-National

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

฿42,131Cathay Pacific

3+ days ago

Mon 9 Nov - Mon 16 Nov

10:11 - 19:35DCA Washington, D.C. Reagan-National-USM Ko Samui

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

11:40 - 18:04USM Ko Samui-DCA Washington, D.C. Reagan-National

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

฿42,366Cathay Pacific

3+ days ago

Sun 8 Nov - Sun 15 Nov

10:11 - 19:35DCA Washington, D.C. Reagan-National-USM Ko Samui

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

11:40 - 18:04USM Ko Samui-DCA Washington, D.C. Reagan-National

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

฿42,634Multiple Airlines

3+ days ago

Sat 7 Nov - Mon 16 Nov

10:11 - 19:35DCA Washington, D.C. Reagan-National-USM Ko Samui

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

11:40 - 21:59USM Ko Samui-DCA Washington, D.C. Reagan-National

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

฿42,668Cathay Pacific

3+ days ago

Mon 9 Nov - Tue 17 Nov

10:11 - 19:35DCA Washington, D.C. Reagan-National-USM Ko Samui

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

11:40 - 18:04USM Ko Samui-DCA Washington, D.C. Reagan-National

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

฿43,707Cathay Pacific

3+ days ago

Sat 13 Mar - Wed 24 Mar

10:19 - 19:35DCA Washington, D.C. Reagan-National-USM Ko Samui

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

11:40 - 19:18USM Ko Samui-DCA Washington, D.C. Reagan-National

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

฿43,807Cathay Pacific

3+ days ago

Wed 10 Mar - Mon 22 Mar

10:19 - 19:35DCA Washington, D.C. Reagan-National-USM Ko Samui

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

11:40 - 21:59USM Ko Samui-DCA Washington, D.C. Reagan-National

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

฿44,276Cathay Pacific

3+ days ago

Fri 15 Jan - Sun 24 Jan

06:00 - 19:35DCA Washington, D.C. Reagan-National-USM Ko Samui

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

11:40 - 18:03USM Ko Samui-DCA Washington, D.C. Reagan-National

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

฿44,310Multiple Airlines

3+ days ago

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 (฿40,992) offered the cheapest return ticket from Washington, D.C. Reagan-National Airport to Ko Samui in the last 5 days.

Find deals

Cheapest flight	฿23,295

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 return price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns 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, return flight prices on this route showed a wide range, from about ฿40,824 to ฿300,625. That means the highest observed fare was about 7x higher than the lowest one.
Which car hire options are available at Ko Samui Airport (USM)?
Ko Samui Airport (USM) hosts 5 major car rental companies, with daily rates starting from around ฿427 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 Chaweng Beach, Lamai Beach, and Maenam 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
• Royal Muang Samui Villas

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DCA - USM

฿23,295 Find Cheap Flights from Reagan Washington National Airport to Ko Samui – Compare and Save

Everything you should know

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

Recent return flight deals from Reagan-National to Ko Samui

Recent one-way flight deals from Reagan-National to Ko Samui

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

Which airline is the cheapest to fly from Washington, D.C. Reagan-National Airport to Ko Samui?

Key details for Washington, D.C. Reagan-National Airport to Ko Samui flights

Cheapest flight

When to book flights from Reagan-National to Ko Samui

Your Washington, D.C. Reagan-National Airport to Ko Samui flight questions, answered

Your guide to booking Washington, D.C. Reagan-National Airport to Ko Samui flights

More options for your flight from Reagan-National to Ko Samui

Complete your trip to Ko Samui with a hotel stay or car hire

Information on your arrival and departure airports

Cabin class types available on flights to Ko Samui

Flights from domestic origins to Ko Samui

Flights to other popular destinations