$1,315+ Cheap flights from Oregon 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — USM
Feb 28 — Mar 71
1 adult, Economy
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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
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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 Oregon to Ko Samui
Cheapest flights from Oregon to Ko SamuiExplore the most affordable flight options available from Oregon to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.
Explore the most affordable flight options available from Oregon to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.
This Gotogate deal was found by Cheapflights users on 1/29. 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 stops27h 05m
Multiple Airlines
Sun 3/159:40 pm
USM
- PDX
2 stops25h 35m
Multiple Airlines
Deal found 1/29![Multiple Airlines logo]()
$1,315
This IEagle deal was found by Cheapflights users on 1/27. 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.
Fri 3/137:05 am
PDX
- USM
3 stops34h 40m
Multiple Airlines
Fri 3/202:05 pm
USM
- PDX
3 stops22h 33m
Multiple Airlines
Deal found 1/27![Multiple Airlines logo]()
$1,389
This CheapOair deal was found by Cheapflights users on 1/28. 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.
Wed 2/47:20 am
PDX
- USM
3 stops33h 25m
Multiple Airlines
Wed 2/188:30 pm
USM
- PDX
3 stops31h 55m
Multiple Airlines
Deal found 1/28![Multiple Airlines logo]()
$1,471
This CheapOair deal was found by Cheapflights users on 1/27. 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.
Sun 2/19:50 am
PDX
- USM
2 stops41h 25m
Multiple Airlines
Sat 2/147:45 pm
USM
- PDX
2 stops33h 55m
Multiple Airlines
Deal found 1/27![Multiple Airlines logo]()
$1,561
This CheapOair deal was found by Cheapflights users on 1/28. 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.
Wed 2/119:50 am
PDX
- USM
2 stops41h 25m
Multiple Airlines
Sun 2/158:30 pm
USM
- PDX
2 stops27h 45m
Multiple Airlines
Deal found 1/28![Multiple Airlines logo]()
$1,681
Find flight deals from Oregon to Ko Samui
Keep the following information in mind while searching for Oregon to Ko Samui flight deals. Data was last updated January 29, 2026.
Most accurate provider | AranGrant 2 stars |
|---|---|
Most trusted provider | Expedia 3 stars |
Round-trip from | $1,315 (Gotogate) |
Cheapflights Fare Finder
Customize your flight search to find flights from Oregon 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 January 29, 2026.
Use the filters below to find and compare flights from Oregon to Ko Samui that are best for you.
Fly from
Oregon
Fly to
Ko Samui
Route
Depart
Return
Price
PortlandKo Samui
PDX - USM
PDXUSM
Portland
Thu 3/5
3:15 pm-9:20 am
2 stops27h 05m
Ko Samui
Sun 3/15
9:40 pm-9:15 am
2 stops25h 35m
$1,315
PortlandKo Samui
PDX - USM
PDXUSM
Portland
Fri 3/13
7:05 am-7:45 am
3 stops34h 40m
Ko Samui
Fri 3/20
2:05 pm-10:38 pm
3 stops22h 33m
$1,389
PortlandKo Samui
PDX - USM
PDXUSM
Portland
Wed 2/11
9:50 am-6:15 pm
2 stops41h 25m
Ko Samui
Sun 2/15
8:30 pm-9:15 am
2 stops27h 45m
$1,681
Best time to book a flight from Oregon to Ko Samui
Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Oregon 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.
Cheapflights Insights
Everything you need to know about your flight from Oregon to Ko Samui
What is the cheapest time of day to fly from OR to USM?
Find hourly flight availability from Oregon 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 January 29, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 66% on flights from Oregon to Ko Samui by exploring options for tickets in the morning.
What is the cheapest day to fly from Oregon to Ko Samui?
Use this chart to determine the cheapest time to fly round-trip from Oregon to Ko Samui. Price data was last updated on March 30, 2025.
Travelers seeking maximum savings on their Oregon to Ko Samui flight should consider departing on Tuesday at noon when fares are most often at their lowest. Saturday evenings 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 Oregon 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