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Ko Samui

$1,690+ 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — USM
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
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 July 1, 2025.

Round-trip from

$1,690
(Singapore Airlines)
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 July 1, 2025.

This Singapore Airlines deal was found by Cheapflights users on 6/29. 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 Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/202:30 pmPDX - USM
2 stops61h 45mSingapore Airlines
Wed 9/241:30 pmUSM - PDX
2 stops36h 57mSingapore Airlines
Deal found 6/29$1,690
This Mytrip deal was found by Cheapflights users on 6/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2910:05 amPDX - USM
3 stops31h 45mMultiple Airlines
Tue 8/58:20 amUSM - PDX
3 stops28h 41mMultiple Airlines
Deal found 6/30$1,800
This Gurufare deal was found by Cheapflights users on 7/1. 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.
Sat 8/28:15 pmPDX - USM
2 stops32h 20mCathay Pacific
Wed 8/1310:55 amUSM - PDX
2 stops43h 31mCathay Pacific
Deal found 7/1$2,484
This Qatar Airways deal was found by Cheapflights users on 6/30. 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 12/2510:35 amPDX - USM
3 stops33h 05mQatar Airways
Fri 1/28:30 pmUSM - PDX
3 stops33h 19mQatar Airways
Deal found 6/30$3,626

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 July 1, 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 9/20

2:30 pm-6:15 pm

2 stops61h 45m

Ko Samui

Wed 9/24

1:30 pm-12:27 pm

2 stops36h 57m

$1,690

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Tue 7/29

10:05 am-7:50 am

3 stops31h 45m

Ko Samui

Tue 8/5

8:20 am-11:01 pm

3 stops28h 41m

$1,800

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Sat 8/2

8:15 pm-6:35 pm

2 stops32h 20m

Ko Samui

Wed 8/13

10:55 am-4:26 pm

2 stops43h 31m

$2,484

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Thu 12/25

10:35 am-10:40 am

3 stops33h 05m

Ko Samui

Fri 1/2

8:30 pm-2:49 pm

3 stops33h 19m

$3,626

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

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 July 1, 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 30, 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.

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 July 1, 2025.
Peruse reviews from past customers who have flown with Singapore Airlines, Cathay Pacific, and Qatar Airways from Portland to Ko Samui to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very good
1,320 reviews

Entertainment

8.0

Crew

8.6

Overall

8.1

Food

7.7

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
Singapore Airlines
8.1
Very good
1,320 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Entertainment

8.0

Crew

8.6

Overall

8.1

Food

7.7

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
Cathay Pacific
7.6
Good
922 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Entertainment

8.0

Crew

8.6

Overall

8.1

Food

7.7

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
Qatar Airways
7.4
Good
3,596 reviews
Singapore Airlines
8.1
Very good
1,320 reviews

Entertainment

8.0

Crew

8.6

Overall

8.1

Food

7.7

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.

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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