$809+ Cheap flights from Washington to Ko Samui (USM)
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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — USM
Mar 15 — Mar 221
1 adult, Economy
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Find cheap flights from Washington to Ko 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 to Ko Samui
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Best
Last-minute
Cheapest flights from Washington to Ko SamuiExplore the most affordable flight options available from Washington to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 13, 2026.
Explore the most affordable flight options available from Washington to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 13, 2026.
This Justfly.com deal was found by Cheapflights users on 2/12. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/310:15 am
SEA
- USM
1 stop31h 30m
Singapore Airlines
Wed 10/147:45 pm
USM
- SEA
1 stop27h 00m
Singapore Airlines
Deal found 2/12![Singapore Airlines logo]()
$809
This oojo deal was found by Cheapflights users on 2/11. 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.
Thu 4/161:15 am
SEA
- USM
2 stops23h 30m
Multiple Airlines
Wed 4/2210:05 am
USM
- SEA
2 stops20h 05m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$912
This FlightHub deal was found by Cheapflights users on 2/10. 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.
Mon 3/91:10 am
SEA
- USM
2 stops25h 50m
EVA Air
Tue 3/177:15 am
USM
- SEA
2 stops25h 55m
EVA Air
Deal found 2/10![EVA Air logo]()
$943
This Gotogate deal was found by Cheapflights users on 2/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1012:45 am
SEA
- USM
2 stops24h 50m
Multiple Airlines
Wed 3/189:20 am
USM
- SEA
2 stops20h 45m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$960
This KAYAK deal was found by Cheapflights users on 2/11. 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.
Fri 4/1710:15 am
SEA
- USM
1 stop31h 30m
Singapore Airlines
Wed 4/226:15 pm
USM
- SEA
1 stop28h 30m
Singapore Airlines
Deal found 2/11![Singapore Airlines logo]()
$963
This FlightHub deal was found by Cheapflights users on 2/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/21:30 am
SEA
- USM
2 stops30h 05m
EVA Air
Wed 10/148:45 am
USM
- SEA
2 stops24h 35m
EVA Air
Deal found 2/12![EVA Air logo]()
$982
This EVA Air deal was found by Cheapflights users on 2/9. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/161:30 am
SEA
- USM
2 stops23h 40m
EVA Air
Mon 9/212:00 pm
USM
- SEA
2 stops19h 40m
EVA Air
Deal found 2/9![EVA Air logo]()
$1,004
This oojo deal was found by Cheapflights users on 2/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/291:15 am
SEA
- USM
2 stops29h 15m
Multiple Airlines
Mon 4/68:10 am
USM
- SEA
2 stops22h 00m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$1,017
This oojo deal was found by Cheapflights users on 2/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/21:15 am
SEA
- USM
2 stops23h 30m
Multiple Airlines
Tue 8/1810:05 am
USM
- SEA
2 stops20h 30m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$1,036
This Singapore Airlines deal was found by Cheapflights users on 2/9. 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 Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1710:15 am
SEA
- USM
1 stop33h 55m
Singapore Airlines
Mon 9/217:45 pm
USM
- SEA
1 stop27h 00m
Singapore Airlines
Deal found 2/9![Singapore Airlines logo]()
$1,058
This Orbitz deal was found by Cheapflights users on 2/12. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/163:15 pm
PDX
- USM
2 stops31h 55m
Multiple Airlines
Wed 4/227:45 pm
USM
- PDX
2 stops27h 25m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$1,163
This Gotogate deal was found by Cheapflights users on 2/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/177:05 pm
PDX
- USM
2 stops33h 10m
Multiple Airlines
Wed 4/224:25 pm
USM
- PDX
2 stops30h 45m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$1,200
Best flights from Washington to Ko SamuiDiscover carefully curated flight deals from Washington to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
Discover carefully curated flight deals from Washington to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
This FlightHub deal was found by Cheapflights users on 2/10. 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.
Mon 3/91:10 am
SEA
- USM
2 stops25h 50m
EVA Air
Tue 3/177:15 am
USM
- SEA
2 stops25h 55m
EVA Air
Deal found 2/10![EVA Air logo]()
$943
This Gotogate deal was found by Cheapflights users on 2/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1012:45 am
SEA
- USM
2 stops24h 50m
Multiple Airlines
Wed 3/189:20 am
USM
- SEA
2 stops20h 45m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$960
This KAYAK deal was found by Cheapflights users on 2/12. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1710:15 am
SEA
- USM
1 stop31h 30m
Singapore Airlines
Wed 4/226:15 pm
USM
- SEA
1 stop28h 30m
Singapore Airlines
Deal found 2/12![Singapore Airlines logo]()
$963
This oojo deal was found by Cheapflights users on 2/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/21:15 am
SEA
- USM
2 stops23h 30m
Multiple Airlines
Tue 8/1810:05 am
USM
- SEA
2 stops20h 30m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$1,036
This IEagle deal was found by Cheapflights users on 2/10. 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 IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/261:10 am
SEA
- USM
2 stops25h 50m
EVA Air
Fri 4/39:00 pm
USM
- SEA
2 stops36h 30m
EVA Air
Deal found 2/10![EVA Air logo]()
$1,208
This Ovago deal was found by Cheapflights users on 2/10. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/279:45 am
SEA
- USM
1 stop32h 00m
Singapore Airlines
Fri 4/38:40 am
USM
- SEA
1 stop38h 05m
Singapore Airlines
Deal found 2/10![Singapore Airlines logo]()
$1,211
This Gotogate deal was found by Cheapflights users on 2/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/177:05 pm
PDX
- USM
2 stops33h 10m
Multiple Airlines
Wed 4/224:25 pm
USM
- PDX
2 stops30h 45m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$1,200
This SmartFares deal was found by Cheapflights users on 2/11. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/2811:50 pm
SEA
- USM
2 stops26h 40m
EVA Air
Sat 4/48:45 am
USM
- SEA
2 stops24h 05m
EVA Air
Deal found 2/11![EVA Air logo]()
$1,250
This SmartFares deal was found by Cheapflights users on 2/10. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/109:45 am
SEA
- USM
1 stop32h 15m
Multiple Airlines
Tue 3/177:00 pm
USM
- SEA
2 stops51h 10m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$1,206
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1710:15 am
SEA
- USM
1 stop31h 30m
Multiple Airlines
Wed 4/2211:55 am
USM
- SEA
2 stops21h 35m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$1,230
This SmartFares deal was found by Cheapflights users on 2/11. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/2811:50 pm
SEA
- USM
2 stops25h 35m
Multiple Airlines
Sat 4/48:10 am
USM
- SEA
2 stops25h 20m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$1,250
This Gotogate deal was found by Cheapflights users on 2/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/53:15 pm
PDX
- USM
2 stops28h 20m
Multiple Airlines
Sun 3/159:40 pm
USM
- PDX
2 stops25h 35m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$1,296
This Gurufare deal was found by Cheapflights users on 2/12. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/167:27 pm
PDX
- USM
3 stops28h 18m
Multiple Airlines
Wed 4/222:00 pm
USM
- PDX
3 stops22h 53m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$1,339
Last-minute flights from Washington to Ko SamuiDiscover last-minute flight deals from Washington to Ko Samui. Data last updated February 13, 2026 and is based on user searches.
Discover last-minute flight deals from Washington to Ko Samui. Data last updated February 13, 2026 and is based on user searches.
This oojo deal was found by Cheapflights users on 2/9. 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.
Sun 2/1511:45 pm
SEA
- USM
2 stops41h 00m
Multiple Airlines
Tue 2/248:15 am
USM
- SEA
2 stops21h 50m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$1,282
This Gotogate deal was found by Cheapflights users on 2/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/53:15 pm
PDX
- USM
2 stops28h 20m
Multiple Airlines
Sun 3/159:40 pm
USM
- PDX
2 stops25h 35m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$1,296
This FlightHub deal was found by Cheapflights users on 2/10. 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.
Mon 3/91:10 am
SEA
- USM
2 stops25h 50m
EVA Air
Tue 3/177:15 am
USM
- SEA
2 stops25h 55m
EVA Air
Deal found 2/10![EVA Air logo]()
$943
This Gotogate deal was found by Cheapflights users on 2/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1012:45 am
SEA
- USM
2 stops24h 50m
Multiple Airlines
Wed 3/189:20 am
USM
- SEA
2 stops20h 45m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$960
This SmartFares deal was found by Cheapflights users on 2/10. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/109:45 am
SEA
- USM
1 stop32h 15m
Multiple Airlines
Tue 3/177:00 pm
USM
- SEA
2 stops51h 10m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$1,206
This IEagle deal was found by Cheapflights users on 2/10. 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 IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/261:10 am
SEA
- USM
2 stops25h 50m
EVA Air
Fri 4/39:00 pm
USM
- SEA
2 stops36h 30m
EVA Air
Deal found 2/10![EVA Air logo]()
$1,208
This Ovago deal was found by Cheapflights users on 2/10. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/279:45 am
SEA
- USM
1 stop32h 00m
Singapore Airlines
Fri 4/38:40 am
USM
- SEA
1 stop38h 05m
Singapore Airlines
Deal found 2/10![Singapore Airlines logo]()
$1,211
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/279:45 am
SEA
- USM
1 stop32h 00m
Multiple Airlines
Fri 4/38:35 pm
USM
- SEA
2 stops26h 25m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$1,294
This SmartFares deal was found by Cheapflights users on 2/11. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/2811:50 pm
SEA
- USM
2 stops26h 40m
EVA Air
Sat 4/48:45 am
USM
- SEA
2 stops24h 05m
EVA Air
Deal found 2/11![EVA Air logo]()
$1,250
Find flight deals from Washington to Ko Samui
Keep the following information in mind while searching for Washington to Ko Samui flight deals. Data was last updated February 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $912 (oojo) |
Cheapflights Fare Finder
Customize your flight search to find flights from Washington 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 February 13, 2026.
Use the filters below to find and compare flights from Washington to Ko Samui that are best for you.
Fly from
Washington
Fly to
Ko Samui
Route
Depart
Return
Price
SeattleKo Samui
SEA - USM
SEAUSM
Seattle/Tacoma Intl
Mon 3/9
1:10 am-5:00 pm
2 stops25h 50m
Ko Samui
Tue 3/17
7:15 am-7:10 pm
2 stops25h 55m
$943
SeattleKo Samui
SEA - USM
SEAUSM
Seattle/Tacoma Intl
Tue 3/10
12:45 am-3:35 pm
2 stops24h 50m
Ko Samui
Wed 3/18
9:20 am-4:05 pm
2 stops20h 45m
$960
SeattleKo Samui
SEA - USM
SEAUSM
Seattle/Tacoma Intl
Fri 4/17
10:15 am-7:45 am
1 stop31h 30m
Ko Samui
Wed 4/22
6:15 pm-8:45 am
1 stop28h 30m
$963
SeattleKo Samui
SEA - USM
SEAUSM
Seattle/Tacoma Intl
Sun 8/2
1:15 am-2:45 pm
2 stops23h 30m
Ko Samui
Tue 8/18
10:05 am-4:35 pm
2 stops20h 30m
$1,036
PortlandKo Samui
PDX - USM
PDXUSM
Portland
Fri 4/17
7:05 pm-6:15 pm
2 stops33h 10m
Ko Samui
Wed 4/22
4:25 pm-9:10 am
2 stops30h 45m
$1,200
SeattleKo Samui
SEA - USM
SEAUSM
Seattle/Tacoma Intl
Tue 3/10
9:45 am-8:00 am
1 stop32h 15m
Ko Samui
Tue 3/17
7:00 pm-8:10 am
2 stops51h 10m
$1,206
SeattleKo Samui
SEA - USM
SEAUSM
Seattle/Tacoma Intl
Thu 3/26
1:10 am-5:00 pm
2 stops25h 50m
Ko Samui
Fri 4/3
9:00 pm-7:30 pm
2 stops36h 30m
$1,208
SeattleKo Samui
SEA - USM
SEAUSM
Seattle/Tacoma Intl
Fri 3/27
9:45 am-7:45 am
1 stop32h 00m
Ko Samui
Fri 4/3
8:40 am-8:45 am
1 stop38h 05m
$1,211
SeattleKo Samui
SEA - USM
SEAUSM
Seattle/Tacoma Intl
Fri 4/17
10:15 am-7:45 am
1 stop31h 30m
Ko Samui
Wed 4/22
11:55 am-7:30 pm
2 stops21h 35m
$1,230
SeattleKo Samui
SEA - USM
SEAUSM
Seattle/Tacoma Intl
Sat 3/28
11:50 pm-4:30 pm
2 stops26h 40m
Ko Samui
Sat 4/4
8:45 am-6:50 pm
2 stops24h 05m
$1,250
Showing 1-10 of 13 results
Best time to book a flight from Washington to Ko Samui
Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Washington with our price prediction graph.
SEA-USM
PDX-USM
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 Washington to Ko Samui
USWA-USM
SEA-USM
PDX-USM
What is the cheapest time of day to fly from WA to USM?
Find hourly flight availability from Washington 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 February 13, 2026.
It’s typically best to fly out from State of Washington to Ko Samui in the afternoon. Doing so could potentially save you 49% on the flight price compared to flying in the morning, which is usually more expensive.
What is the cheapest day to fly from State of Washington to Ko Samui?
Use this chart to determine the cheapest time to fly round-trip from Washington to Ko Samui. Price data was last updated on March 30, 2025.
Travelers seeking maximum savings on their State of Washington to Ko Samui flight should consider departing on Monday afternoons when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Related info for your journey
Find useful and relevant information for your journey from Washington to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Ko Samui?
Book flights to Ko Samui if you plan to visit one of these locationsKo Tao
Ko Pha Ngan
Browse thousands of different options on Cheapflights for your next trip
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Other flights to Ko Samui
Explore flights to Ko Samui departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on February 13, 2026.
Washington and Ko Samui flights
Browse other Washington and Ko Samui flight options. Last updated on February 13, 2026.
Popular flight searches
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Consider these flights traveling from Washington to Ko Samui.
Top 2 airlines flying from Washington to Ko Samui
Discover the top 2 airlines that operate flights from Washington to Ko 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 2,558,603 searches. Data last updated February 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$859 | Average$1,066 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$898 | Average$1,233 | FlexibilityNo cancel fee | On-time74% |