HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Koh Samui

$1,936+ Cheap flights from Reagan-National (DCA) to Koh Samui (USM)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — USM
Nov 5 — Nov 121
1 adult
Tue 11/5
Tue 11/12
We work with more than 300 partners to bring you better travel deals

...and more

Find cheap flights from Reagan-National to Koh Samui with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 2,570,725 searches. Data last updated October 31, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.Koh Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Mon 2/10

9:29 am-7:35 pm

2 stops46h 06m

Ko Samui

Sun 2/16

11:40 am-10:02 am

2 stops34h 22m

$1,936

Washington, D.C.Koh Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Mon 2/10

9:00 am-6:15 pm

2 stops45h 15m

Ko Samui

Sun 2/16

1:25 pm-8:59 pm

3 stops43h 34m

$2,947

Washington, D.C.Koh Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Fri 12/20

6:38 am-7:40 am

3 stops37h 02m

Ko Samui

Mon 12/30

7:10 pm-7:59 pm

3 stops36h 49m

$5,541

Washington, D.C.Koh Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Fri 12/20

8:40 pm-7:35 pm

2 stops34h 55m

Ko Samui

Mon 12/30

8:20 pm-10:37 pm

3 stops38h 17m

$5,602

Flights are sorted by cheapest first

Deals found on 10/31

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.

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).

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 does DCA to USM mean?

    This is defined as Washington, D.C. Reagan-National Airport (DCA) and Ko Samui Airport (USM). Codes like Ko Samui Airport are often used to just call airports uniquely.

  • Can I find deals for flights from Reagan-National to Koh Samui that include extra baggage allowance?

    The amount of baggage you can bring on your Reagan-National to Koh Samui flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Reagan-National to Koh Samui with specific airlines?

    Yes, Cheapflights allows you to browse and filter Reagan-National to Koh Samui flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • 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.

  • Can I find deals for flights from Reagan-National to Koh Samui that allow pets onboard?

    Many airlines flying from Reagan-National to Koh Samui offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Reagan-National to Koh Samui?

    Yes, you can often find last-minute deals on Reagan-National to Koh Samui flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines