$556+ Cheap flights from Portland (PDX) 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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — USM
Oct 30 — Nov 61
Round-trip
1 adult, Economy
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Find cheap flights from Portland 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 Portland to Ko Samui
Cheapest
Best
Last-minute
One-way
Cheapest flights from Portland to Ko SamuiExplore the most affordable flight options available from Portland to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 30, 2026.
Explore the most affordable flight options available from Portland to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 30, 2026.
This Justfly.com deal was found by Cheapflights users on 9/29. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/81:35 pm -
2 stops39h 00m
Sun 11/2211:40 am -
2 stops41h 03m
Deal found 9/29![Multiple Airlines logo]()
$1,092
This SmartFares deal was found by Cheapflights users on 9/27. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/12:48 pm -
2 stops37h 47m
Wed 12/211:40 am -
2 stops25h 48m
Deal found 9/27![Multiple Airlines logo]()
$1,099
This CheapOair deal was found by Cheapflights users on 9/28. 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.
Sat 10/3110:48 am -
2 stops66h 47m
Tue 12/19:10 pm -
3 stops31h 18m
Deal found 9/28![Multiple Airlines logo]()
$1,214
This Gotogate deal was found by Cheapflights users on 9/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:04 pm -
3 stops32h 56m
Wed 12/28:40 am -
3 stops28h 48m
Deal found 9/27![Cathay Pacific logo]()
$1,480
This FlightHub deal was found by Cheapflights users on 9/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/13:15 pm -
2 stops37h 20m
Fri 12/1111:40 am -
2 stops36h 47m
Deal found 9/29![Multiple Airlines logo]()
$2,192
This Globehunters deal was found by Cheapflights users on 9/27. 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 Globehunters is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/255:53 pm -
2 stops58h 42m
Fri 1/811:40 am -
2 stops38h 11m
Deal found 9/27![Multiple Airlines logo]()
$2,442
Best flights from Portland to Ko SamuiDiscover carefully curated flight deals from Portland to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 30, 2026.
Discover carefully curated flight deals from Portland to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 30, 2026.
This Justfly.com deal was found by Cheapflights users on 9/29. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/81:35 pm -
2 stops39h 00m
Sun 11/2211:40 am -
2 stops41h 03m
Deal found 9/29![Multiple Airlines logo]()
$1,092
This Gotogate deal was found by Cheapflights users on 9/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:04 pm -
3 stops32h 56m
Wed 12/28:40 am -
3 stops28h 48m
Deal found 9/27![Cathay Pacific logo]()
$1,480
This SmartFares deal was found by Cheapflights users on 9/27. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/12:48 pm -
2 stops37h 47m
Wed 12/211:40 am -
2 stops25h 48m
Deal found 9/27![Multiple Airlines logo]()
$1,099
This CheapOair deal was found by Cheapflights users on 9/27. 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.
Sat 10/3110:48 am -
2 stops66h 47m
Tue 12/19:10 pm -
3 stops31h 18m
Deal found 9/27![Multiple Airlines logo]()
$1,214
This Cathay Pacific deal was found by Cheapflights users on 9/28. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/215:50 pm -
2 stops35h 45m
Sat 3/2711:40 am -
2 stops35h 45m
Deal found 9/28![Multiple Airlines logo]()
$1,346
This FlightHub deal was found by Cheapflights users on 9/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/13:15 pm -
2 stops37h 20m
Fri 12/1111:40 am -
2 stops36h 47m
Deal found 9/28![Multiple Airlines logo]()
$2,192
Last-minute flights from Portland to Ko SamuiDiscover last-minute flight deals from Portland to Ko Samui. Data last updated September 30, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Ko Samui. Data last updated September 30, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 9/28. 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.
Sat 10/3110:48 am -
2 stops66h 47m
Tue 12/19:10 pm -
3 stops31h 18m
Deal found 9/28![Multiple Airlines logo]()
$1,214
One-way flights from Portland to Ko SamuiSearch for one-way flight options from Portland to Ko Samui. Find affordable one-way fares based on user searches. Data last updated September 30, 2026.
Search for one-way flight options from Portland to Ko Samui. Find affordable one-way fares based on user searches. Data last updated September 30, 2026.
This oojo deal was found by Cheapflights users on 9/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/242:34 pm -
2 stops38h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Multiple Airlines logo]()
$556
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/236:10 pm -
3 stops59h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Multiple Airlines logo]()
$572
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/266:10 pm -
3 stops57h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Multiple Airlines logo]()
$575
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/216:10 pm -
3 stops57h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Multiple Airlines logo]()
$576
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/276:10 pm -
3 stops57h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Multiple Airlines logo]()
$580
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/256:10 pm -
2 stops46h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Multiple Airlines logo]()
$587
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/225:25 am -
3 stops45h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Multiple Airlines logo]()
$619
Find flight deals from Portland to Ko Samui
Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Ko 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 September 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,092 (Justfly.com) |
One-way from | $556 (oojo) |
Cheapflights Fare Finder
Customize your flight search to find flights from Portland 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 7,457,451 searches. Data last updated September 30, 2026.
Use the filters below to find and compare flights from Portland to Ko Samui that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PortlandKo Samui
PDX Portland - USM Ko Samui
PDXUSM
Portland
Sun 1/24
2:34 pm-7:35 pm
2 stops38h 01m
Ko Samui
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$556
PortlandKo Samui
PDX Portland - USM Ko Samui
PDXUSM
Portland
Mon 3/15
2:30 pm-7:35 pm
2 stops39h 05m
Ko Samui
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$556
PortlandKo Samui
PDX Portland - USM Ko Samui
PDXUSM
Portland
Thu 1/21
6:10 pm-6:15 pm
3 stops57h 05m
Ko Samui
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$576
PortlandKo Samui
PDX Portland - USM Ko Samui
PDXUSM
Portland
Fri 1/22
5:25 am-6:15 pm
3 stops45h 50m
Ko Samui
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$619
PortlandKo Samui
PDX Portland - USM Ko Samui
PDXUSM
Portland
Wed 1/27
7:09 am-7:35 pm
2 stops45h 26m
Ko Samui
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$620
PortlandKo Samui
PDX Portland - USM Ko Samui
PDXUSM
Portland
Tue 1/26
6:10 pm-7:35 pm
2 stops58h 25m
Ko Samui
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$633
PortlandKo Samui
PDX Portland - USM Ko Samui
PDXUSM
Portland
Mon 3/15
6:07 am-7:10 am
3 stops35h 03m
Ko Samui
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$644
Quickest round-trip
PortlandKo Samui
PDX Portland - USM Ko Samui
PDXUSM
Portland
Fri 12/25
8:02 am-6:55 am
3 stops31h 53m
Ko Samui
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$1,062
PortlandKo Samui
PDX Portland - USM Ko Samui
PDXUSM
Portland
Sun 11/8
1:35 pm-7:35 pm
2 stops39h 00m
Ko Samui
Sun 11/22
11:40 am-1:43 pm
2 stops41h 03m
$1,092
PortlandKo Samui
PDX Portland - USM Ko Samui
PDXUSM
Portland
Sun 11/1
2:48 pm-7:35 pm
2 stops37h 47m
Ko Samui
Wed 12/2
11:40 am-10:28 pm
2 stops25h 48m
$1,099
Showing 1-10 of 15 resultsSorted by cheapest first
Compare providers for flights from Portland to Ko 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 Portland to Ko Samui in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Portland-Ko Samui flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Ko Samui flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Ko Samui flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Portland-Ko 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 Portland-Ko 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 Portland to Ko Samui
Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Portland with our price prediction graph.
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.
Related info for your journey
Find useful and relevant information for your journey from Portland 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
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