Cheap flights from Washington, D.C. (WAS) to Koh Samui (USM) from $1,740

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 7/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
WAS — USM
May 27 — Jun 31

Cheap flight deals from Washington, D.C. to Koh Samui

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) 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 May 22, 2024.

Round-trip from

$1,045
From Washington, D.C. (WAS) to Ko Samui

What is the cheapest day to fly round-trip from Washington, D.C. to Koh Samui?

Flights from Washington, D.C. to Koh Samui are found to be more expensive on Friday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Koh Samui.

When is the cheapest time to fly from Washington, D.C. to Koh Samui (WAS - USM)?

One of the essential ways to save on airfare from Washington, D.C. to Koh Samui is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 17% on airfare.

Cheap Qatar Airways flights from Washington, D.C. to Koh Samui

Explore cheap flight options specifically provided by Qatar Airways for the route between Washington, D.C. and Koh Samui. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,730,072 searches. Data last updated May 22, 2024.
Consider these cheap Qatar Airways flights we've found departing from Washington, D.C. to Koh Samui. Make sure to check back often as deals are often changing.
Thu 8/89:05 pmIAD - USM
2 stops26h 40mQatar Airways
Fri 8/169:10 pmUSM - IAD
2 stops30h 00mQatar Airways
Deal found 5/20$1,859
Fri 8/99:05 pmIAD - USM
2 stops26h 05mQatar Airways
Fri 8/169:10 pmUSM - IAD
2 stops30h 00mQatar Airways
Deal found 5/20$1,881
Thu 6/202:00 pmDCA - USM
3 stops32h 20mQatar Airways
Sun 6/309:10 pmUSM - DCA
3 stops47h 07mQatar Airways
Deal found 5/22$2,333
Thu 8/87:45 pmDCA - USM
3 stops34h 20mQatar Airways
Fri 8/169:10 pmUSM - DCA
3 stops47h 06mQatar Airways
Deal found 5/20$2,510
Fri 8/97:45 pmDCA - USM
3 stops33h 50mQatar Airways
Fri 8/169:10 pmUSM - DCA
3 stops47h 06mQatar Airways
Deal found 5/20$2,519

Cheap Cathay Pacific flights from Washington, D.C. to Koh Samui

Explore cheap flight options specifically provided by Cathay Pacific for the route between Washington, D.C. and Koh Samui. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,730,072 searches. Data last updated May 22, 2024.
Some of the lowest-priced Cathay Pacific flights we've found at this time heading from Washington, D.C. to Koh Samui. Deals frequently update to provide users with more options.
Thu 6/2012:29 pmDCA - USM
2 stops43h 06mCathay Pacific
Sun 6/308:00 amUSM - DCA
3 stops43h 24mCathay Pacific
Deal found 5/22$2,680
Thu 6/2012:29 pmDCA - USM
2 stops43h 06mCathay Pacific
Sun 6/3010:55 amUSM - DCA
2 stops40h 29mCathay Pacific
Deal found 5/22$2,734
Fri 8/912:29 pmDCA - USM
2 stops43h 06mCathay Pacific
Fri 8/1610:55 amUSM - DCA
2 stops40h 22mCathay Pacific
Deal found 5/20$2,744

Cheap Washington, D.C. to Koh Samui flights in May & June 2024

Find cheap flight options from Washington, D.C. to Koh Samui specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,730,072 searches. Prices were last updated on May 22, 2024.
These are some of the best deals we've found on flights to Koh Samui in 2024 at this time. If these deals don't appeal to you, be sure to come back soon for more options.
Thu 6/209:50 pmIAD - USM
2 stops36h 25mTurkish Airlines
Sun 6/301:30 pmUSM - IAD
2 stops36h 15mTurkish Airlines
Deal found 5/22$1,755
Thu 6/202:00 pmDCA - USM
3 stops32h 20mQatar Airways
Sun 6/309:10 pmUSM - DCA
3 stops47h 07mQatar Airways
Deal found 5/22$2,333
Thu 6/204:00 pmIAD - USM
3 stops29h 15mMultiple Airlines
Sun 6/303:20 pmUSM - IAD
3 stops34h 20mMultiple Airlines
Deal found 5/22$2,459
Thu 6/2010:55 amIAD - USM
3 stops34h 10mMultiple Airlines
Sun 6/301:30 pmUSM - IAD
2 stops36h 15mMultiple Airlines
Deal found 5/22$2,601
Thu 6/2012:29 pmDCA - USM
2 stops43h 06mCathay Pacific
Sun 6/308:00 amUSM - DCA
3 stops43h 24mCathay Pacific
Deal found 5/22$2,680
Thu 6/2012:29 pmDCA - USM
2 stops43h 06mCathay Pacific
Sun 6/3010:55 amUSM - DCA
2 stops40h 29mCathay Pacific
Deal found 5/22$2,734
Thu 6/206:50 pmBWI - USM
3 stops26h 45mMultiple Airlines
Sun 6/307:30 pmUSM - BWI
3 stops33h 10mMultiple Airlines
Deal found 5/22$2,750
Thu 6/209:20 pmBWI - USM
2 stops58h 00mMultiple Airlines
Sun 6/304:25 pmUSM - BWI
2 stops38h 10mMultiple Airlines
Deal found 5/22$2,971
Thu 6/207:45 amBWI - USM
3 stops37h 30mMultiple Airlines
Sun 6/304:25 pmUSM - BWI
2 stops37h 20mMultiple Airlines
Deal found 5/22$4,938

Washington, D.C. to Koh Samui 2024 flight deals

Discover exclusive flight deals for travel between Washington, D.C. and Koh Samui in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,730,072 searches. Data last updated May 22, 2024.
These are some of the best deals we've found on flights to Koh Samui in 2024 at this time. If these deals don't appeal to you, be sure to come back soon for more options.
Mon 7/84:40 pmIAD - USM
2 stops29h 40mMultiple Airlines
Mon 7/155:55 pmUSM - IAD
2 stops31h 50mMultiple Airlines
Deal found 5/22$1,740
Thu 6/209:50 pmIAD - USM
2 stops36h 25mTurkish Airlines
Sun 6/301:30 pmUSM - IAD
2 stops36h 15mTurkish Airlines
Deal found 5/22$1,755
Thu 8/89:05 pmIAD - USM
2 stops26h 40mQatar Airways
Fri 8/169:10 pmUSM - IAD
2 stops30h 00mQatar Airways
Deal found 5/20$1,859
Fri 8/99:05 pmIAD - USM
2 stops26h 05mQatar Airways
Fri 8/169:10 pmUSM - IAD
2 stops30h 00mQatar Airways
Deal found 5/20$1,881
Thu 6/202:00 pmDCA - USM
3 stops32h 20mQatar Airways
Sun 6/309:10 pmUSM - DCA
3 stops47h 07mQatar Airways
Deal found 5/22$2,333
Mon 7/89:55 amIAD - USM
3 stops35h 10mMultiple Airlines
Mon 7/157:10 pmUSM - IAD
2 stops29h 20mMultiple Airlines
Deal found 5/22$2,369
Thu 6/204:00 pmIAD - USM
3 stops29h 15mMultiple Airlines
Sun 6/303:20 pmUSM - IAD
3 stops34h 20mMultiple Airlines
Deal found 5/22$2,459
Mon 7/87:45 pmDCA - USM
3 stops33h 00mQatar Airways
Mon 7/159:10 pmUSM - DCA
3 stops47h 06mQatar Airways
Deal found 5/22$2,486
Mon 7/87:45 pmDCA - USM
2 stops59h 50mCathay Pacific
Mon 7/1510:55 amUSM - DCA
2 stops46h 05mCathay Pacific
Deal found 5/22$2,497

Find flights from Washington, D.C. to Koh Samui within your budget

Customize your flight search to find flights from Washington, D.C. 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 2,730,072 searches. Data last updated May 22, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$1,755 - $2,734

Route

Depart

Return

Price

Washington, D.C. Dulles IntlKo Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Thu 6/20

2 stops36h 25m

Ko Samui

Sun 6/30

2 stops36h 15m

$1,755

Washington, D.C. Dulles IntlKo Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Thu 8/8

2 stops26h 40m

Ko Samui

Fri 8/16

2 stops30h 00m

$1,859

Washington, D.C. Dulles IntlKo Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Fri 8/9

2 stops26h 05m

Ko Samui

Fri 8/16

2 stops30h 00m

$1,881

Washington, D.C. Reagan-NationalKo Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Thu 6/20

3 stops32h 20m

Ko Samui

Sun 6/30

3 stops47h 07m

$2,333

Washington, D.C. Dulles IntlKo Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Thu 6/20

3 stops29h 15m

Ko Samui

Sun 6/30

3 stops34h 20m

$2,459

Washington, D.C. Dulles IntlKo Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Thu 8/8

2 stops46h 35m

Ko Samui

Fri 8/16

3 stops46h 45m

$2,501

Washington, D.C. Reagan-NationalKo Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Thu 6/20

2 stops43h 06m

Ko Samui

Sun 6/30

3 stops43h 24m

$2,680

Washington, D.C. Dulles IntlKo Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Fri 8/9

3 stops51h 05m

Ko Samui

Fri 8/16

3 stops62h 05m

$2,733

Washington, D.C. Reagan-NationalKo Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Thu 6/20

2 stops43h 06m

Ko Samui

Sun 6/30

2 stops40h 29m

$2,734

Flights are sorted by cheapest first

Deals found on 5/22

When is the cheapest time to fly from Washington, D.C. to Koh Samui?

Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to Koh Samui. Price data was last updated on May 19, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Washington, D.C. to Koh Samui flight should consider departing on Friday evenings when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from Washington, D.C. to Koh Samui

Have a flexible travel schedule? Discover the best time to fly to Koh Samui from Washington, D.C. 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.

Temperature and rainfall in Koh Samui by month

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

USM

Temperature

80.6 - 84.2 °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 May 22, 2024.
To help decide which airline to fly from Washington, D.C. to Koh Samui, see what other customers have to say about Qatar Airways, Cathay Pacific and Singapore Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.2
Very good
1,436 reviews

Boarding

8.4

Food

7.8

Comfort

8.1

Crew

8.7

Entertainment

8.1

Overall

8.2

Reviews

1 / 10

They changed my flight but didn't notify the other carrier. I can't do online check-in and had to wait 30 min to get it all sort out at the counter.

8.2
Very good
1,436 reviews
8.2
Very good
1,436 reviews

Boarding

8.4

Food

7.8

Comfort

8.1

Crew

8.7

Entertainment

8.1

Overall

8.2

Reviews

1 / 10

They changed my flight but didn't notify the other carrier. I can't do online check-in and had to wait 30 min to get it all sort out at the counter.

7.8
Good
1,074 reviews
8.2
Very good
1,436 reviews

Boarding

8.4

Food

7.8

Comfort

8.1

Crew

8.7

Entertainment

8.1

Overall

8.2

Reviews

1 / 10

They changed my flight but didn't notify the other carrier. I can't do online check-in and had to wait 30 min to get it all sort out at the counter.

7.7
Good
4,365 reviews
8.2
Very good
1,436 reviews

Boarding

8.4

Food

7.8

Comfort

8.1

Crew

8.7

Entertainment

8.1

Overall

8.2

Reviews

1 / 10

They changed my flight but didn't notify the other carrier. I can't do online check-in and had to wait 30 min to get it all sort out at the counter.

7.4
Good
3,712 reviews
8.2
Very good
1,436 reviews

Boarding

8.4

Food

7.8

Comfort

8.1

Crew

8.7

Entertainment

8.1

Overall

8.2

Reviews

1 / 10

They changed my flight but didn't notify the other carrier. I can't do online check-in and had to wait 30 min to get it all sort out at the counter.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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.?

    For a flight from Washington, D.C. to Koh Samui, you will be flying into Ko Samui. Ko Samui (USM) is just 2.1 mi from the center of the city. Ko Samui is the only Koh Samui airport and it handles 0 inbound flights from Washington, D.C. per day. 1 airline has flights to Ko Samui from Washington, D.C. on a regular basis.

  • Can I find flights from Washington, D.C. to Koh Samui for under $1,800 on Cheapflights?

    Yes, there are multiple flights from Washington, D.C. to Koh Samui for under $1,800. The cheapest flight booked recently is on Turkish Airlines for just $1,755, but on average you can expect to pay $2,531.

  • What are the cheapest airlines flying from Washington, D.C. to Koh Samui round-trip?

    According to our current data, Turkish Airlines ($1,755), Qatar Airways ($1,859), and Cathay Pacific ($2,680) offers the cheapest pricing from Washington, D.C. to Koh Samui.

  • What are the most popular routes from Washington, D.C. to Koh Samui?

  • What does IAD to USM mean?

    Washington, D.C. Dulles Intl Airport is IAD and Ko Samui Airport is USM. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service. Baltimore/Washington Airport (BWI), Washington, D.C. Reagan-National Airport (DCA) are other airports near this flight route and their unique identifiers/IATA codes.

  • Can I find deals for flights from Washington, D.C. to Koh Samui that include extra baggage allowance?

    The amount of baggage you can bring on your Washington, D.C. 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 Washington, D.C. to Koh Samui with specific airlines?

    Yes, Cheapflights allows you to browse and filter Washington, D.C. 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 Washington, D.C. to Koh Samui that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Koh Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Koh Samui?

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

  • Can I find deals for business class flights from Washington, D.C. to Koh Samui?

    Yes. Cheapflights offers flight deals from Washington, D.C. 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 Washington, D.C. to Koh Samui that allow pets onboard?

    Many airlines flying from Washington, D.C. 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 Washington, D.C. to Koh Samui?

    Yes, you can often find last-minute deals on Washington, D.C. 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.

  • How recently were the Washington, D.C. to Koh Samui flight deals updated?

    The Washington, D.C. to Koh Samui flight deals you see on this page were last updated on 5/22.

See more FAQs

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Top airline flying from Washington, D.C. to Koh Samui

Discover the top airline that operate flights from Washington, D.C. to Koh Samui. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,730,072 searches. Data last updated May 22, 2024.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$1,409Average$1,490FlexibilityNo cancel feeOn-time68%
Search Qatar Airways flights

Search flights from Washington, D.C. to Koh Samui by cabin class

Find flights from Washington, D.C. to Koh Samui, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Washington, D.C. to Koh Samui?

Deals for Washington, D.C. to Koh Samui flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Washington, D.C. to Koh Samui?

Cheapflights simply makes it quick and affordable to book flights from Washington, D.C. to Koh Samui by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Washington, D.C. to Koh Samui with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Washington, D.C. to Koh Samui, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Washington, D.C. to Koh Samui become cheaper?

Yes, Cheapflights offers price alerts on Washington, D.C. to Koh Samui flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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