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Koh Samui

$668+ Cheap flights from Portland (PDX) 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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — USM
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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Cheap flight deals from Portland to Koh Samui

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) 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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,271
(CheapOair)

One-way from

$668
(Kiwi.com)
Provider with most accurate pricing for Portland-Ko Samui flight deals.
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Provider most trusted by Cheapflights users for Portland-Ko Samui flights.
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From Portland to Ko Samui
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One-way flight from Portland to Ko Samui
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Find flight deals from Portland to Koh Samui

Cheapest flights from Portland to Koh Samui
Explore the most affordable flight options available from Portland to Koh Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

This Expedia deal was found by Cheapflights users on 2/20. 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.
Wed 3/267:05 pmPDX - USM
2 stops35h 40mMultiple Airlines
Fri 4/111:30 pmUSM - PDX
2 stops39h 15mMultiple Airlines
Deal found 2/20$1,256
This KAYAK deal was found by Cheapflights users on 2/20. 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.
Wed 3/266:05 pmPDX - USM
2 stops59h 30mCathay Pacific
Wed 4/910:55 amUSM - PDX
2 stops24h 04mCathay Pacific
Deal found 2/20$1,781
This CheapOair deal was found by Cheapflights users on 2/19. 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 3/267:00 amPDX - USM
3 stops34h 40mJapan Airlines
Wed 4/99:00 pmUSM - PDX
3 stops33h 13mJapan Airlines
Deal found 2/19$1,972
This Qatar Airways deal was found by Cheapflights users on 2/20. 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.
Wed 3/2611:36 amPDX - USM
3 stops33h 04mQatar Airways
Fri 4/116:25 pmUSM - PDX
3 stops36h 03mQatar Airways
Deal found 2/20$2,565
This KAYAK deal was found by Cheapflights users on 2/20. 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.
Wed 3/267:00 amPDX - USM
3 stops45h 15mSingapore Airlines
Fri 4/111:30 pmUSM - PDX
2 stops47h 19mSingapore Airlines
Deal found 2/20$2,723

Find flights from Portland to Koh Samui within your budget

Customize your flight search to find flights from Portland 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 February 20, 2025.

Fly from

Portland

Fly to

Koh Samui

Route

Depart

Return

Price

PortlandKoh Samui

PDX - USM

PDXUSM

Portland

Wed 3/26

7:05 pm-8:45 pm

2 stops35h 40m

Ko Samui

Fri 4/11

1:30 pm-2:45 pm

2 stops39h 15m

$1,256

PortlandKoh Samui

PDX - USM

PDXUSM

Portland

Wed 3/26

6:05 pm-7:35 pm

2 stops59h 30m

Ko Samui

Wed 4/9

10:55 am-8:59 pm

2 stops24h 04m

$1,781

PortlandKoh Samui

PDX - USM

PDXUSM

Portland

Wed 3/26

7:00 am-7:40 am

3 stops34h 40m

Ko Samui

Wed 4/9

9:00 pm-4:13 pm

3 stops33h 13m

$1,972

PortlandKoh Samui

PDX - USM

PDXUSM

Portland

Wed 3/26

11:36 am-10:40 am

3 stops33h 04m

Ko Samui

Fri 4/11

6:25 pm-4:28 pm

3 stops36h 03m

$2,565

PortlandKoh Samui

PDX - USM

PDXUSM

Portland

Wed 3/26

7:00 am-6:15 pm

3 stops45h 15m

Ko Samui

Fri 4/11

1:30 pm-10:49 pm

2 stops47h 19m

$2,723

PortlandKoh Samui

PDX - USM

PDXUSM

Portland

Sat 4/5

5:20 pm-6:30 pm

2 stops59h 10m

$668

PortlandKoh Samui

PDX - USM

PDXUSM

Portland

Mon 5/19

7:21 am-6:35 pm

2 stops45h 14m

$976

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Compare providers for flights from Portland 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 Portland to Koh Samui in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
FlightHubPrice 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-Koh Samui flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Koh Samui flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Koh Samui flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-Koh 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-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 Portland to Koh Samui

Have a flexible travel schedule? Discover the best time to fly to Koh 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.

Travel insights for flights from Portland to Koh Samui

Get recent, data-driven insights about flights from Portland to Koh Samui including ideal travel times, pricing trends, and more.

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

Find hourly flight availability from Portland to Koh 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 20, 2025.

One of the essential ways to save on airfare from Portland to Koh Samui is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the morning could potentially save you up to 58% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from Portland to Koh Samui. Price data was last updated on February 16, 2025.

Travelers seeking maximum savings on their Portland to Koh 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 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 February 20, 2025.
Japan Airlines
8.3
Very good
1,440 reviews

Crew

8.7

Food

7.7

Comfort

8.2

Overall

8.3

Boarding

8.4

Entertainment

7.8

Reviews

1 / 20

8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.

Japan Airlines
8.3
Very good
1,440 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Crew

8.7

Food

7.7

Comfort

8.2

Overall

8.3

Boarding

8.4

Entertainment

7.8

Reviews

1 / 20

8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.

Singapore Airlines
8.1
Very good
1,299 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Crew

8.7

Food

7.7

Comfort

8.2

Overall

8.3

Boarding

8.4

Entertainment

7.8

Reviews

1 / 20

8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.

Cathay Pacific
7.5
Good
821 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Crew

8.7

Food

7.7

Comfort

8.2

Overall

8.3

Boarding

8.4

Entertainment

7.8

Reviews

1 / 20

8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.

Qatar Airways
7.4
Good
3,609 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Crew

8.7

Food

7.7

Comfort

8.2

Overall

8.3

Boarding

8.4

Entertainment

7.8

Reviews

1 / 20

8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.

Related info for your journey

Find useful and relevant information for your journey from Portland to Koh 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 Koh Samui that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Portland to Koh 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 Pha Ngan
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