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Ko Samui

$942+ Cheap flights from District of Columbia to Ko 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 6/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — USM
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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Cheap flight deals from District of Columbia to Ko Samui

Keep the following information in mind while searching for District of Columbia to Ko Samui flight deals. Data was last updated April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,441
(FlightHub)

One-way from

$942
(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 Ko Samui

Cheapest flights from District of Columbia to Ko Samui
Explore the most affordable flight options available from District of Columbia to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

This FlightHub deal was found by Cheapflights users on 4/17. 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 10/19:40 pmIAD - USM
2 stops23h 35mTurkish Airlines
Fri 10/316:05 pmUSM - IAD
2 stops29h 10mTurkish Airlines
Deal found 4/17$1,252
This FlightHub deal was found by Cheapflights users on 4/16. 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.
Sun 11/308:05 pmIAD - USM
2 stops26h 35mQatar Airways
Tue 2/106:15 pmUSM - IAD
2 stops33h 40mQatar Airways
Deal found 4/16$1,323
This Emirates deal was found by Cheapflights users on 4/16. 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 Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2710:30 amIAD - USM
2 stops43h 00mEmirates
Tue 2/105:40 pmUSM - IAD
2 stops26h 30mEmirates
Deal found 4/16$1,532
This oojo deal was found by Cheapflights users on 4/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/110:55 amIAD - USM
2 stops41h 15mMultiple Airlines
Fri 10/318:30 pmUSM - IAD
3 stops34h 35mMultiple Airlines
Deal found 4/17$1,569
This Gurufare deal was found by Cheapflights users on 4/17. 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.
Fri 8/156:59 amDCA - USM
2 stops24h 36mCathay Pacific
Tue 8/2610:55 amUSM - DCA
2 stops44h 49mCathay Pacific
Deal found 4/17$1,744
This British Airways deal was found by Cheapflights users on 4/16. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/19:55 pmIAD - USM
2 stops32h 20mBritish Airways
Thu 2/124:25 pmUSM - IAD
2 stops35h 10mBritish Airways
Deal found 4/16$2,069
This oojo deal was found by Cheapflights users on 4/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/49:59 amDCA - USM
3 stops48h 11mSingapore Airlines
Fri 7/111:30 pmUSM - DCA
2 stops43h 12mSingapore Airlines
Deal found 4/17$3,458
This oojo deal was found by Cheapflights users on 4/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/45:34 pmIAD - USM
2 stops37h 41mSingapore Airlines
Fri 7/114:25 pmUSM - IAD
3 stops59h 00mSingapore Airlines
Deal found 4/17$4,031

Cheapflights Fare Finder

Customize your flight search to find flights from District of Columbia to Ko 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 April 17, 2025.
Use the filters below to find and compare flights from District of Columbia to Ko Samui that are best for you.

Fly from

District of Columbia

Fly to

Ko Samui

Route

Depart

Return

Price

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Mon 5/26

1:30 pm-8:15 am

2 stops31h 45m

Ko Samui

Tue 6/10

3:50 pm-11:45 am

2 stops30h 55m

$1,441

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sun 6/8

1:30 pm-1:10 pm

2 stops36h 40m

Ko Samui

Sun 6/15

7:30 pm-11:45 am

2 stops27h 15m

$1,580

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Fri 8/15

6:59 am-6:35 pm

2 stops24h 36m

Ko Samui

Tue 8/26

10:55 am-8:44 pm

2 stops44h 49m

$1,744

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sat 5/31

10:55 am-11:40 am

2 stops61h 45m

Ko Samui

Sat 6/7

8:00 am-8:40 am

2 stops35h 40m

$2,478

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Fri 7/4

9:59 am-9:10 pm

3 stops48h 11m

Ko Samui

Fri 7/11

1:30 pm-9:42 pm

2 stops43h 12m

$3,458

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Fri 7/4

5:34 pm-6:15 pm

2 stops37h 41m

Ko Samui

Fri 7/11

4:25 pm-4:25 pm

3 stops59h 00m

$4,031

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sun 6/8

10:05 pm-7:50 am

3 stops46h 45m

$942

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Thu 8/14

9:59 am-6:15 pm

2 stops45h 16m

$1,050

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

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

Have a flexible travel schedule? Discover the best time to fly to Ko 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.

Cheapflights Insights

Everything you need to know about your flight from District of Columbia to Ko Samui

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

Find hourly flight availability from District of Columbia to Ko Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 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 Ko Samui as you normally would.

Rainfall in Ko Samui by month

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

In terms of precipitation, rainfall in Ko 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 Ko Samui when rainfall is around 2.3 in.

Temperature in Ko Samui by month

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

If weather is an important factor for your trip to Ko 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 Ko Samui

Get insights into the airlines that provide service to Ko 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 Ko Samui. Reviews last updated April 17, 2025.
Read through reviews of airlines operating flights from District of Columbia to Ko Samui, such as Singapore Airlines, Emirates and Cathay Pacific. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very good
1,288 reviews

Entertainment

8.0

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Boarding

8.2

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
Singapore Airlines
8.1
Very good
1,288 reviews
Singapore Airlines
8.1
Very good
1,288 reviews

Entertainment

8.0

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Boarding

8.2

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
Emirates
8.0
Very good
3,200 reviews
Singapore Airlines
8.1
Very good
1,288 reviews

Entertainment

8.0

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Boarding

8.2

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
Cathay Pacific
7.5
Good
849 reviews
Singapore Airlines
8.1
Very good
1,288 reviews

Entertainment

8.0

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Boarding

8.2

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
Turkish Airlines
7.3
Good
3,769 reviews
Singapore Airlines
8.1
Very good
1,288 reviews

Entertainment

8.0

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Boarding

8.2

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.

Related info for your journey

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

    For a flight from District of Columbia to Ko 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 Ko Samui that include hotel bookings?

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

  • How can I find direct flights from District of Columbia to Ko 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 Ko Samui.

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

    Yes. Cheapflights offers flight deals from District of Columbia to Ko 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 Tao
Ko Pha Ngan

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