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Koh Samui

$531+ Cheap flights from District of Columbia 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 3/16. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — USM
Feb 4 — Feb 111
Tue 2/4
Tue 2/11
1 adult, Economy
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Cheap flight deals from District of Columbia to Koh Samui

Discover tips and strategies to find the most affordable flight options for your journey from District of Columbia (USDC) 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 January 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,290
(FlightHub)

One-way from

$531
(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 District of Columbia to Ko Samui
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One-way flight from District of Columbia to Ko Samui
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Find flight deals from District of Columbia to Koh Samui

Cheapest flights from District of Columbia to Koh Samui
Explore the most affordable flight options available from District of Columbia to Koh Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 30, 2025.

This FlightHub deal was found by Cheapflights users on 1/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/193:00 pmIAD - USM
2 stops29h 40mTurkish Airlines
Wed 4/27:10 pmUSM - IAD
2 stops26h 40mTurkish Airlines
Deal found 1/30$1,290
This Gotogate deal was found by Cheapflights users on 1/30. 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.
Sun 3/169:05 pmIAD - USM
2 stops31h 05mQatar Airways
Sun 3/233:50 pmUSM - IAD
2 stops36h 05mQatar Airways
Deal found 1/30$1,365
This Gotogate deal was found by Cheapflights users on 1/30. 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.
Sun 3/1611:00 amIAD - USM
2 stops41h 35mMultiple Airlines
Sun 3/239:30 pmUSM - IAD
3 stops33h 20mMultiple Airlines
Deal found 1/30$1,467
This Gurufare deal was found by Cheapflights users on 1/29. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/1611:40 amDCA - USM
2 stops44h 55mCathay Pacific
Sun 3/2311:40 amUSM - DCA
2 stops39h 49mCathay Pacific
Deal found 1/29$1,943
This KAYAK deal was found by Cheapflights users on 1/28. 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.
Sun 9/79:30 amDCA - USM
2 stops45h 45mSingapore Airlines
Sun 9/211:30 pmUSM - DCA
2 stops42h 25mSingapore Airlines
Deal found 1/28$2,217
This Gurufare deal was found by Cheapflights users on 1/29. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/175:00 pmIAD - USM
3 stops62h 15mSingapore Airlines
Fri 7/44:25 pmUSM - IAD
2 stops48h 30mSingapore Airlines
Deal found 1/29$2,403
This StudentUniverse deal was found by Cheapflights users on 1/30. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/19:05 amDCA - USM
3 stops43h 20mMultiple Airlines
Sat 3/88:30 amUSM - DCA
3 stops26h 46mMultiple Airlines
Deal found 1/30$2,838

Find flights from District of Columbia to Koh Samui within your budget

Customize your flight search to find flights from District of Columbia 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 January 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.Koh Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Wed 3/19

3:00 pm-7:40 am

2 stops29h 40m

Ko Samui

Wed 4/2

7:10 pm-10:50 am

2 stops26h 40m

$1,290

Washington, D.C.Koh Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Wed 3/19

9:05 pm-10:40 am

2 stops26h 35m

Ko Samui

Wed 4/2

7:00 pm-4:10 pm

2 stops32h 10m

$1,340

Washington, D.C.Koh Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sat 3/1

8:05 pm-6:15 pm

2 stops34h 10m

Ko Samui

Sat 3/8

8:15 am-3:55 pm

2 stops43h 40m

$1,412

Washington, D.C.Koh Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Sun 3/16

11:40 am-7:35 pm

2 stops44h 55m

Ko Samui

Sun 3/23

11:40 am-4:29 pm

2 stops39h 49m

$1,943

Washington, D.C.Koh Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Sat 5/31

9:05 am-6:15 pm

3 stops46h 10m

Ko Samui

Sat 6/7

1:30 pm-8:59 pm

2 stops42h 29m

$2,694

Washington, D.C.Koh Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Sat 3/1

9:05 am-4:25 pm

3 stops43h 20m

Ko Samui

Sat 3/8

8:30 am-11:16 pm

3 stops26h 46m

$2,838

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/30

Best time to book a flight from District of Columbia to Koh Samui

Have a flexible travel schedule? Discover the best time to fly to Koh Samui from District of Columbia 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 District of Columbia to Koh Samui

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

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

Find hourly flight availability from District of Columbia 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 January 30, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from District of Columbia to Koh Samui as you normally would.

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 January 30, 2025.
Singapore Airlines
8.1
Very good
1,318 reviews

Food

7.7

Crew

8.6

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Ketan,Nov 2024

SIN - AMD

Food was not good. It was like few days old.

Singapore Airlines
8.1
Very good
1,318 reviews
Singapore Airlines
8.1
Very good
1,318 reviews

Food

7.7

Crew

8.6

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Ketan,Nov 2024

SIN - AMD

Food was not good. It was like few days old.

Qatar Airways
7.5
Good
3,715 reviews
Singapore Airlines
8.1
Very good
1,318 reviews

Food

7.7

Crew

8.6

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Ketan,Nov 2024

SIN - AMD

Food was not good. It was like few days old.

Cathay Pacific
7.5
Good
820 reviews
Singapore Airlines
8.1
Very good
1,318 reviews

Food

7.7

Crew

8.6

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Ketan,Nov 2024

SIN - AMD

Food was not good. It was like few days old.

Turkish Airlines
7.3
Good
3,903 reviews
Singapore Airlines
8.1
Very good
1,318 reviews

Food

7.7

Crew

8.6

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Ketan,Nov 2024

SIN - AMD

Food was not good. It was like few days old.

Related info for your journey

Find useful and relevant information for your journey from District of Columbia 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 District of Columbia?

    For a flight from District of Columbia to Koh Samui, you will be flying into Ko Samui. Ko Samui (USM) is just 2.1 mi from the center of the city.

  • Can I find deals for flights from District of Columbia to Koh Samui that include hotel bookings?

    Yes. In addition to deals on District of Columbia to Koh Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from District of Columbia to Koh Samui?

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

  • Can I find deals for business class flights from District of Columbia to Koh Samui?

    Yes. Cheapflights offers flight deals from District of Columbia 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 District of Columbia?

Book flights to District of Columbia if you plan to visit one of these locations
Ko Pha Ngan
Ko Tao

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Alternative routes for District of Columbia to Koh Samui

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