$1,012+ Cheap flights from Dulles Intl (IAD) 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — USM
Dec 17 — Dec 241
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Dulles Intl 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.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 December 12, 2024.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,349 (SmartFares) |
Find flight deals from Dulles Intl to Koh Samui
Cheapest flights from Dulles Intl to Koh SamuiExplore the most affordable flight options available from Dulles Intl to Koh Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2024.
Explore the most affordable flight options available from Dulles Intl to Koh Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2024.
This Mytrip deal was found by Cheapflights users on 12/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2710:35 amIAD - USM
3 stops32h 35mMultiple Airlines
Mon 1/277:00 pmUSM - IAD
2 stops31h 10mMultiple Airlines
Deal found 12/12![Multiple Airlines logo]()
$2,295
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 2,637,880 searches. Data last updated December 12, 2024.
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
Thu 3/20
3:00 pm-12:35 pm
2 stops34h 35m
Ko Samui
Wed 3/26
5:50 pm-1:15 pm
2 stops30h 25m
$1,311
Washington, D.C.Koh Samui
IAD - USM
IADUSM
Washington, D.C. Dulles Intl
Tue 2/25
8:05 pm-1:05 pm
2 stops29h 00m
Ko Samui
Tue 3/11
8:15 am-9:20 am
2 stops36h 05m
$1,349
Washington, D.C.Koh Samui
IAD - USM
IADUSM
Washington, D.C. Dulles Intl
Fri 5/9
9:05 pm-1:55 pm
2 stops29h 50m
Ko Samui
Mon 7/7
2:30 pm-8:45 am
2 stops29h 15m
$1,503
Washington, D.C.Koh Samui
IAD - USM
IADUSM
Washington, D.C. Dulles Intl
Thu 5/8
9:05 pm-10:30 am
2 stops26h 25m
$1,012
Washington, D.C.Koh Samui
IAD - USM
IADUSM
Washington, D.C. Dulles Intl
Thu 5/8
7:00 am-6:20 pm
3 stops48h 20m
$1,516
- Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Koh Samui flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Koh Samui flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Koh Samui flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Koh Samui flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Koh Samui flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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.
Travel insights for flights from Dulles Intl to Koh Samui
Get recent, data-driven insights about flights from Dulles Intl 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).