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Ko Samui

$1,510+ 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 4/26. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — USM
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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Cheap 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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,510
(Expedia)
Provider with most accurate pricing for Portland-Ko Samui flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Ko Samui flights.
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From Portland to Ko Samui
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Find flight deals from Portland to Ko Samui

Cheapest flights from Portland to Ko Samui
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 March 28, 2025.

This Expedia deal was found by Cheapflights users on 3/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/263:25 pmPDX - USM
2 stops27h 10mMultiple Airlines
Sat 5/34:25 pmUSM - PDX
2 stops36h 15mMultiple Airlines
Deal found 3/27$1,510
This StudentUniverse deal was found by Cheapflights users on 3/27. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/267:00 amPDX - USM
3 stops34h 20mCathay Pacific
Thu 7/310:55 amUSM - PDX
2 stops27h 19mCathay Pacific
Deal found 3/27$2,096
This Qatar Airways deal was found by Cheapflights users on 3/27. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1710:30 amPDX - USM
3 stops34h 15mQatar Airways
Wed 7/237:30 pmUSM - PDX
3 stops35h 06mQatar Airways
Deal found 3/27$2,433
This Gurufare deal was found by Cheapflights users on 3/27. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/157:30 amPDX - USM
3 stops43h 45mSingapore Airlines
Wed 12/311:25 pmUSM - PDX
2 stops38h 54mSingapore Airlines
Deal found 3/27$2,835

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 2,558,603 searches. Data last updated March 28, 2025.
Use the filters below to find and compare flights from Portland to Ko Samui that are best for you.

Fly from

Portland

Fly to

Ko Samui

Route

Depart

Return

Price

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Sat 4/26

3:25 pm-8:35 am

2 stops27h 10m

Ko Samui

Sat 5/3

4:25 pm-2:40 pm

2 stops36h 15m

$1,510

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Thu 6/26

7:00 am-7:20 am

3 stops34h 20m

Ko Samui

Thu 7/3

10:55 am-12:14 am

2 stops27h 19m

$2,096

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Sat 4/26

10:31 am-10:30 am

3 stops33h 59m

Ko Samui

Sat 5/3

6:55 pm-7:20 pm

3 stops38h 25m

$2,574

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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.
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 Portland to Ko Samui

What is the cheapest time of day to fly from PDX to USM?

Find hourly flight availability from Portland 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 March 28, 2025.

One of the essential ways to save on airfare from Portland to Ko Samui is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 67% on airfare.

What is the cheapest day to fly from Portland to Ko Samui?

Use this chart to determine the cheapest time to fly round-trip from Portland to Ko Samui. Price data was last updated on March 23, 2025.

Travelers seeking maximum savings on their Portland to Ko Samui flight should consider departing on Tuesday at noon 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.

Rainfall in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ko 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 Ko Samui when rainfall is around 2.3 in.

Temperature in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ko 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 Ko Samui

Get insights into the airlines that provide service to Ko 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 Ko Samui. Reviews last updated March 28, 2025.
Cathay Pacific
7.5
Good
837 reviews

Crew

8.0

Food

7.2

Entertainment

7.7

Overall

7.5

Comfort

7.6

Boarding

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2025

BOS - HKG

It would have been nice to understand the dates of takeoff! We missed our flight and now have to pay an extra $454.00 Very stressful and not easy to check in or get information
Cathay Pacific
7.5
Good
837 reviews
Cathay Pacific
7.5
Good
837 reviews

Crew

8.0

Food

7.2

Entertainment

7.7

Overall

7.5

Comfort

7.6

Boarding

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2025

BOS - HKG

It would have been nice to understand the dates of takeoff! We missed our flight and now have to pay an extra $454.00 Very stressful and not easy to check in or get information
Qatar Airways
7.4
Good
3,538 reviews
Cathay Pacific
7.5
Good
837 reviews

Crew

8.0

Food

7.2

Entertainment

7.7

Overall

7.5

Comfort

7.6

Boarding

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2025

BOS - HKG

It would have been nice to understand the dates of takeoff! We missed our flight and now have to pay an extra $454.00 Very stressful and not easy to check in or get information

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.

  • Can I find deals for flights from Portland to Ko Samui that include hotel bookings?

    Yes. In addition to deals on Portland to Ko Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Ko Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Ko Samui.

  • Can I find deals for business class flights from Portland to Ko Samui?

    Yes. Cheapflights offers flight deals from Portland to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Ko Tao
Ko Pha Ngan

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