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Koh Samui

$747+ Cheap flights from Reagan-National (DCA) to Koh Samui (USM)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — USM
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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Cheap flight deals from Reagan-National to Koh Samui

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) to Koh Samui (USM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,729
(Gurufare)

One-way from

$747
(Kiwi.com)
Provider with most accurate pricing for Washington, D.C. (WAS)-Ko Samui flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Ko Samui flights.
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From Washington, D.C. Reagan-National to Ko Samui
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One-way flight from Washington, D.C. Reagan-National to Ko Samui
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Find flight deals from Reagan-National to Koh Samui

Cheapest flights from Reagan-National to Koh Samui
Explore the most affordable flight options available from Reagan-National to Koh Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

This Gotogate deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/511:40 amDCA - USM
2 stops43h 55mCathay Pacific
Sat 4/1210:55 amUSM - DCA
2 stops33h 34mCathay Pacific
Deal found 2/19$1,856
This Expedia deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/312:29 pmDCA - USM
2 stops43h 06mMultiple Airlines
Thu 7/1710:55 amUSM - DCA
2 stops45h 00mMultiple Airlines
Deal found 2/19$2,131
This KAYAK deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/79:05 amDCA - USM
3 stops46h 10mSingapore Airlines
Thu 6/191:30 pmUSM - DCA
2 stops42h 25mSingapore Airlines
Deal found 2/20$3,110

Find flights from Reagan-National to Koh Samui within your budget

Customize your flight search to find flights from Reagan-National to Koh Samui that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 20, 2025.

Fly from

Reagan-National

Fly to

Koh Samui

Route

Depart

Return

Price

Washington, D.C.Koh Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Sat 4/5

11:40 am-6:35 pm

2 stops43h 55m

Ko Samui

Sat 4/12

10:55 am-9:29 am

2 stops33h 34m

$1,856

Washington, D.C.Koh Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Thu 7/3

12:29 pm-6:35 pm

2 stops43h 06m

Ko Samui

Thu 7/17

10:55 am-8:55 pm

2 stops45h 00m

$2,131

Washington, D.C.Koh Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Sat 6/7

9:05 am-6:15 pm

3 stops46h 10m

Ko Samui

Thu 6/19

1:30 pm-8:55 pm

2 stops42h 25m

$3,110

Washington, D.C.Koh Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Wed 2/26

9:00 am-8:20 am

3 stops35h 20m

$747

Washington, D.C.Koh Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Wed 2/26

9:29 am-7:35 pm

2 stops46h 06m

$976

Washington, D.C.Koh Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Tue 2/25

9:00 am-6:15 pm

2 stops45h 15m

$1,151

Washington, D.C.Koh Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Wed 2/26

7:05 pm-3:40 pm

3 stops32h 35m

$1,218

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Best time to book a flight from Reagan-National to Koh Samui

Have a flexible travel schedule? Discover the best time to fly to Koh Samui from Reagan-National with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Reagan-National to Koh Samui

Get recent, data-driven insights about flights from Reagan-National to Koh Samui including ideal travel times, pricing trends, and more.

What is the cheapest time of day to fly from DCA to USM?

Find hourly flight availability from Reagan-National to Koh Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 20, 2025.

One of the essential ways to save on airfare from Washington, D.C. Reagan-National Airport to Koh Samui is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 32% on airfare.

What is the cheapest day to fly from Washington, D.C. Reagan-National Airport to Koh Samui?

Use this chart to determine the cheapest time to fly round-trip from Reagan-National to Koh Samui. Price data was last updated on February 16, 2025.

Travelers seeking maximum savings on their Washington, D.C. Reagan-National Airport to Koh Samui flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Koh Samui by month

Plan your trip to Koh Samui by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Koh Samui ranges from 2.3 - 19.3 inches per month. November is typically the wettest month, when rainfall can reach 19.3 in. February is typically the driest time to visit Koh Samui when rainfall is around 2.3 in.

Temperature in Koh Samui by month

Plan your trip to Koh Samui by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Koh Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 80.6 F).

Reviews of airlines servicing Koh Samui

Get insights into the airlines that provide service to Koh Samui. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Koh Samui. Reviews last updated February 20, 2025.
Singapore Airlines
8.1
Very good
1,299 reviews

Crew

8.6

Boarding

8.2

Comfort

7.9

Food

7.7

Overall

8.1

Entertainment

8.0

Reviews

1 / 20

2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.

Singapore Airlines
8.1
Very good
1,299 reviews
Singapore Airlines
8.1
Very good
1,299 reviews

Crew

8.6

Boarding

8.2

Comfort

7.9

Food

7.7

Overall

8.1

Entertainment

8.0

Reviews

1 / 20

2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.

Cathay Pacific
7.5
Good
821 reviews
Singapore Airlines
8.1
Very good
1,299 reviews

Crew

8.6

Boarding

8.2

Comfort

7.9

Food

7.7

Overall

8.1

Entertainment

8.0

Reviews

1 / 20

2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.

Qatar Airways
7.4
Good
3,609 reviews
Singapore Airlines
8.1
Very good
1,299 reviews

Crew

8.6

Boarding

8.2

Comfort

7.9

Food

7.7

Overall

8.1

Entertainment

8.0

Reviews

1 / 20

2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to Koh Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Koh Samui from Washington, D.C. Reagan-National?

    Most people fly into Ko Samui (USM) if they book a flight to Koh Samui from Washington, D.C. Reagan-National. On average, Ko Samui has 0 inbound flights from Washington, D.C. Reagan-National per day from 0 airlines. Ko Samui is conveniently located just 2.1 mi from Koh Samui’s city center.

  • What are the cheapest airlines to fly from Washington, D.C. Reagan-National Airport to Koh Samui one-way?

    The cheapest airline one-way is Cathay Pacific, with whom users have recently found tickets for as low as $1,043. However, be on the lookout for offers from Singapore Airlines and Qatar Airways, as they are both options that can get you from Washington, D.C. Reagan-National Airport to Koh Samui for a low price.

  • Can I find deals for flights from Reagan-National to Koh Samui that include hotel bookings?

    Yes. In addition to deals on Reagan-National to Koh Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Reagan-National to Koh Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Reagan-National to Koh Samui.

  • Can I find deals for business class flights from Reagan-National to Koh Samui?

    Yes. Cheapflights offers flight deals from Reagan-National to Koh Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Washington, D.C. Reagan-National Airport?

Book flights to Washington, D.C. Reagan-National Airport if you plan to visit one of these locations
Ko Pha Ngan
Ko Tao

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