$650+ Cheap flights from Washington, D.C. (WAS) 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 2/8. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Washington, D.C. 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 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 January 21, 2025.
Most accurate provider | AranGrant 3 stars |
|---|---|
Most trusted provider | AranGrant 3 stars |
Round-trip from | $1,311 (FlightHub) |
One-way from | $650 (Kiwi.com) |
Find flight deals from Washington, D.C. to Koh Samui
Cheapest flights from Washington, D.C. to Koh SamuiExplore the most affordable flight options available from Washington, D.C. to Koh Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.
Explore the most affordable flight options available from Washington, D.C. to Koh Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.
This FlightHub deal was found by Cheapflights users on 1/21. 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.
This FlightHub deal was found by Cheapflights users on 1/21. 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.
This Mytrip deal was found by Cheapflights users on 1/21. 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.
This Emirates deal was found by Cheapflights users on 1/21. 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.
This Gurufare deal was found by Cheapflights users on 1/21. 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.
This British Airways deal was found by Cheapflights users on 1/21. 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.
This KAYAK deal was found by Cheapflights users on 1/21. 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.
This CheapOair deal was found by Cheapflights users on 1/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This FlightHub deal was found by Cheapflights users on 1/21. 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.
This CheapOair deal was found by Cheapflights users on 1/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
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 2,558,603 searches. Data last updated January 21, 2025.
Fly from
Fly to
Route
Depart
Return
Price
Washington, D.C.Koh Samui
IAD - USM
IADUSM
Washington, D.C. Dulles Intl
Thu 3/20
3:00 pm-8:10 am
2 stops30h 10m
Ko Samui
Wed 3/26
8:30 am-8:30 pm
2 stops47h 00m
Washington, D.C.Koh Samui
IAD - USM
IADUSM
Washington, D.C. Dulles Intl
Tue 2/18
8:05 pm-6:15 pm
2 stops34h 10m
Ko Samui
Tue 2/25
8:15 am-3:55 pm
2 stops67h 40m
Washington, D.C.Koh Samui
IAD - USM
IADUSM
Washington, D.C. Dulles Intl
Thu 3/20
9:05 pm-10:40 am
2 stops26h 35m
Ko Samui
Wed 3/26
7:00 pm-4:55 pm
2 stops32h 55m
Washington, D.C.Koh Samui
IAD - USM
IADUSM
Washington, D.C. Dulles Intl
Tue 6/17
10:55 am-4:55 pm
2 stops43h 00m
Ko Samui
Fri 7/4
5:55 pm-8:40 am
2 stops49h 45m
Washington, D.C.Koh Samui
DCA - USM
DCAUSM
Washington, D.C. Reagan-National
Wed 3/5
9:29 am-7:35 pm
2 stops46h 06m
Ko Samui
Wed 3/12
11:40 am-9:29 am
2 stops32h 49m
BaltimoreKoh Samui
BWI - USM
BWIUSM
Baltimore/Washington
Wed 3/5
8:30 pm-9:05 pm
2 stops36h 35m
Ko Samui
Wed 3/12
1:25 pm-7:45 pm
2 stops41h 20m
Washington, D.C.Koh Samui
DCA - USM
DCAUSM
Washington, D.C. Reagan-National
Sat 6/21
9:30 am-9:10 pm
2 stops48h 40m
Ko Samui
Sat 6/28
4:25 pm-8:55 pm
2 stops63h 30m
Washington, D.C.Koh Samui
DCA - USM
DCAUSM
Washington, D.C. Reagan-National
Tue 6/17
12:29 pm-7:35 am
3 stops32h 06m
Ko Samui
Fri 7/4
2:35 pm-9:16 am
3 stops29h 41m
BaltimoreKoh Samui
BWI - USM
BWIUSM
Baltimore/Washington
Tue 6/17
5:50 pm-6:15 pm
2 stops37h 25m
Ko Samui
Fri 7/4
1:30 pm-4:47 pm
2 stops38h 17m
BaltimoreKoh Samui
BWI - USM
BWIUSM
Baltimore/Washington
Tue 6/17
7:51 am-10:10 am
3 stops39h 19m
Ko Samui
Fri 7/4
7:15 pm-9:30 pm
3 stops37h 15m
Compare providers for flights from Washington, D.C. to Koh Samui
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to Koh Samui in January.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Washington, D.C.-Koh Samui flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Washington, D.C.-Koh Samui flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Koh Samui flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Washington, D.C.-Koh Samui flights, Cheapflights users trust AranGrant the most. AranGrant 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.-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 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.
Travel insights for flights from Washington, D.C. to Koh Samui
Get recent, data-driven insights about flights from Washington, D.C. 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).
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 21, 2025.
Entertainment
Overall
Food
Crew
Boarding
Comfort
Reviews
Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
Entertainment
Overall
Food
Crew
Boarding
Comfort
Reviews
Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
Entertainment
Overall
Food
Crew
Boarding
Comfort
Reviews
Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
Entertainment
Overall
Food
Crew
Boarding
Comfort
Reviews
Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
Entertainment
Overall
Food
Crew
Boarding
Comfort
Reviews
Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
Entertainment
Overall
Food
Crew
Boarding
Comfort
Reviews
Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles