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Cheap flights from Dulles Intl (IAD) to Koh Samui (USM) from $943

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 7/16. 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.
IAD — USM
Jun 12 — Jun 191
From?
To?
Wed 6/12
Wed 6/19
1 adult, Economy
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Cheap flight deals from Dulles Intl to Koh Samui

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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 June 7, 2024.

Round-trip from

$1,173

One-way from

$943
From Washington, D.C. Dulles Intl to Ko Samui
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One-way flight from Washington, D.C. Dulles Intl to Ko Samui
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What is the cheapest day to fly round-trip from Washington, D.C. Dulles Intl Airport to Koh Samui?

Flights from Washington, D.C. Dulles Intl Airport 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.

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Dulles Intl Airport to Koh Samui as you normally would.

Dulles Intl to Koh Samui 2024 flight deals

Discover exclusive flight deals for travel between Dulles Intl and Koh Samui in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,045,324 searches. Data last updated June 7, 2024.
Sun 9/229:50 pmIAD - USM
2 stops25h 20mTurkish Airlines
Tue 10/15:50 pmUSM - IAD
2 stops31h 55mTurkish Airlines
Deal found 6/7$1,284
Sat 11/238:05 pmIAD - USM
2 stops47h 05mMultiple Airlines
Fri 2/711:35 amUSM - IAD
2 stops40h 20mMultiple Airlines
Deal found 6/6$1,462
Sun 9/225:40 pmIAD - USM
2 stops37h 40mMultiple Airlines
Tue 10/17:15 pmUSM - IAD
3 stops36h 03mMultiple Airlines
Deal found 6/7$1,712
Sat 11/238:05 pmIAD - USM
2 stops35h 30mMultiple Airlines
Fri 2/76:45 amUSM - IAD
3 stops45h 00mMultiple Airlines
Deal found 6/6$1,804
Sat 11/236:05 pmIAD - USM
3 stops27h 20mMultiple Airlines
Fri 2/76:45 amUSM - IAD
3 stops45h 00mMultiple Airlines
Deal found 6/6$1,848
Sat 8/244:40 pmIAD - USM
2 stops31h 05mTurkish Airlines
Sat 8/314:25 pmUSM - IAD
2 stops38h 30mTurkish Airlines
Deal found 6/6$1,870
Thu 11/2110:20 pmIAD - USM
2 stops34h 45mMultiple Airlines
Sun 12/18:40 pmUSM - IAD
2 stops55h 55mMultiple Airlines
Deal found 6/6$5,734
Wed 11/208:05 pmIAD - USM
2 stops26h 35mQatar Airways
Sat 11/303:50 pmUSM - IAD
2 stops28h 45mQatar Airways
Deal found 6/6$6,766
Wed 11/2010:30 amIAD - USM
2 stops36h 05mEmirates
Sun 12/13:05 pmUSM - IAD
2 stops29h 05mEmirates
Deal found 6/6$7,618

One-way flights to Koh Samui from Dulles Intl

Search for one-way flight options from Dulles Intl to Koh Samui. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,045,324 searches. Data last updated June 7, 2024.
Tue 7/1611:15 amIAD - USM
3 stops33h 50mMultiple Airlines
Deal found 6/6$943
Tue 7/1611:15 amIAD - USM
3 stops33h 50mMultiple Airlines
Deal found 6/6$944
Tue 7/169:50 pmIAD - USM
2 stops36h 10mTurkish Airlines
Deal found 6/6$1,018

Find flights from Dulles Intl to Koh Samui within your budget

Customize your flight search to find flights from Dulles Intl 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 3,045,324 searches. Data last updated June 7, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$1,284 - $7,618

Route

Depart

Return

Price

Washington, D.C. Dulles IntlKo Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sun 9/22

2 stops25h 20m

Ko Samui

Tue 10/1

2 stops31h 55m

$1,284

Washington, D.C. Dulles IntlKo Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sat 11/23

2 stops47h 05m

Ko Samui

Fri 2/7

2 stops40h 20m

$1,462

Washington, D.C. Dulles IntlKo Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sun 9/22

2 stops37h 40m

Ko Samui

Tue 10/1

3 stops36h 03m

$1,712

Washington, D.C. Dulles IntlKo Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sat 11/23

2 stops35h 30m

Ko Samui

Fri 2/7

3 stops45h 00m

$1,804

Washington, D.C. Dulles IntlKo Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sat 11/23

3 stops27h 20m

Ko Samui

Fri 2/7

3 stops45h 00m

$1,848

Washington, D.C. Dulles IntlKo Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sat 8/24

2 stops31h 05m

Ko Samui

Sat 8/31

2 stops38h 30m

$1,870

Washington, D.C. Dulles IntlKo Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Thu 11/21

2 stops34h 45m

Ko Samui

Sun 12/1

2 stops55h 55m

$5,734

Washington, D.C. Dulles IntlKo Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Wed 11/20

2 stops26h 35m

Ko Samui

Sat 11/30

2 stops28h 45m

$6,766

Washington, D.C. Dulles IntlKo Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Wed 11/20

2 stops36h 05m

Ko Samui

Sun 12/1

2 stops29h 05m

$7,618

Flights are sorted by cheapest first

Deals found on 6/7

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Koh Samui?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Koh Samui. Price data was last updated on June 2, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Koh Samui flight should consider departing on Tuesday 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.
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Best time to book a flight from Dulles Intl to Koh Samui

Have a flexible travel schedule? Discover the best time to fly to Koh Samui from Dulles Intl 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

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 June 7, 2024.
Emirates
8.1
Very good
3,886 reviews

Food

7.9

Overall

8.1

Boarding

8.2

Entertainment

8.3

Crew

8.3

Comfort

8.1

Reviews

1 / 10

The seats were very uncomfortable. I along with maybe 4 other passengers were never given our breakfast meal. The attendant completely forgot about us. For such a long flight the seats should be made with more comfort in mind. Just because it is economy doesn’t mean we don’t deserve comfort.

Emirates
8.1
Very good
3,886 reviews
Emirates
8.1
Very good
3,886 reviews

Food

7.9

Overall

8.1

Boarding

8.2

Entertainment

8.3

Crew

8.3

Comfort

8.1

Reviews

1 / 10

The seats were very uncomfortable. I along with maybe 4 other passengers were never given our breakfast meal. The attendant completely forgot about us. For such a long flight the seats should be made with more comfort in mind. Just because it is economy doesn’t mean we don’t deserve comfort.

Qatar Airways
7.7
Good
4,312 reviews
Emirates
8.1
Very good
3,886 reviews

Food

7.9

Overall

8.1

Boarding

8.2

Entertainment

8.3

Crew

8.3

Comfort

8.1

Reviews

1 / 10

The seats were very uncomfortable. I along with maybe 4 other passengers were never given our breakfast meal. The attendant completely forgot about us. For such a long flight the seats should be made with more comfort in mind. Just because it is economy doesn’t mean we don’t deserve comfort.

Turkish Airlines
7.4
Good
3,718 reviews
Emirates
8.1
Very good
3,886 reviews

Food

7.9

Overall

8.1

Boarding

8.2

Entertainment

8.3

Crew

8.3

Comfort

8.1

Reviews

1 / 10

The seats were very uncomfortable. I along with maybe 4 other passengers were never given our breakfast meal. The attendant completely forgot about us. For such a long flight the seats should be made with more comfort in mind. Just because it is economy doesn’t mean we don’t deserve comfort.

Lufthansa
7.0
Good
7,518 reviews
Emirates
8.1
Very good
3,886 reviews

Food

7.9

Overall

8.1

Boarding

8.2

Entertainment

8.3

Crew

8.3

Comfort

8.1

Reviews

1 / 10

The seats were very uncomfortable. I along with maybe 4 other passengers were never given our breakfast meal. The attendant completely forgot about us. For such a long flight the seats should be made with more comfort in mind. Just because it is economy doesn’t mean we don’t deserve comfort.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl 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. Dulles Intl?

    Located just 2.1 mi from the city center, Ko Samui is the airport most travelers will use when flying to Koh Samui from Washington, D.C. Dulles Intl. Booking flights from Washington, D.C. Dulles Intl to Ko Samui (USM) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. Dulles Intl from 1 airline.

  • Can I find flights from Washington, D.C. Dulles Intl Airport to Koh Samui for under $1,300 on Cheapflights?

    Yes, there are multiple flights from Washington, D.C. Dulles Intl Airport to Koh Samui for under $1,300. The cheapest flight booked recently is on Turkish Airlines for just $1,284, but on average you can expect to pay $5,603.

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

    Cheapflights users have booked flights from Washington, D.C. Dulles Intl Airport to Koh Samui round-trip from $1,284. Other airlines that can offer you cheap pricing are Qatar Airways, from $6,766, and Emirates, from $7,618.

  • 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.

  • Can I find deals for flights from Dulles Intl to Koh Samui that include extra baggage allowance?

    The amount of baggage you can bring on your Dulles Intl 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 Dulles Intl to Koh Samui with specific airlines?

    Yes, Cheapflights allows you to browse and filter Dulles Intl 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 Dulles Intl to Koh Samui that include hotel bookings?

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

  • How can I find direct flights from Dulles Intl to Koh Samui?

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

  • Can I find deals for business class flights from Dulles Intl to Koh Samui?

    Yes. Cheapflights offers flight deals from Dulles Intl 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 Dulles Intl to Koh Samui that allow pets onboard?

    Many airlines flying from Dulles Intl 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 Dulles Intl to Koh Samui?

    Yes, you can often find last-minute deals on Dulles Intl 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. Dulles Intl Airport to Koh Samui flight deals updated?

    The Washington, D.C. Dulles Intl Airport to Koh Samui flight deals you see on this page were last updated on 6/7.

See more FAQs

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Alternative routes for Dulles Intl to Koh Samui
See prices for flight routes from nearby airports that may be better suited for you.

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Top airline flying from Dulles Intl to Koh Samui

Discover the top airline that operate flights from Dulles Intl 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 3,045,324 searches. Data last updated June 7, 2024.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$1,409Average$1,490FlexibilityNo cancel feeOn-time68%
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Search flights from Dulles Intl to Koh Samui by cabin class

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