Which airports can I use when flying from Portland to Ko Samui?

Flights from Portland to Ko Samui usually depart from Portland (PDX) and arrive at Ko Samui (USM).

What cabin classes can I book on flights from Portland to Ko Samui?

Two cabin classes are available on flights from Portland to Ko Samui: • Premium Economy Class • Business Class

Can I save money by using flexible dates for flights from Portland to Ko Samui?

Yes. Being flexible with your travel dates can save you up to 33% on the Portland to Ko Samui route. Monday is the cheapest departure day at $1,220 round-trip on average, while Tuesday is the most expensive at $1,811, a difference of $591. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in Ko Samui?

Some of the most popular sights in Ko Samui are Lamai Beach, Chaweng Beach and Fishermans Village. These are among the most viewed places in Ko Samui on KAYAK.

Do I need a passport to fly from Portland to Ko Samui?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Have flight prices from Portland to Ko Samui changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $993 to $5,237. That means the highest observed fare was about 5x higher than the lowest one.

How are flight prices from Portland to Ko Samui looking right now?

One-way fares from Portland to Ko Samui are currently higher than usual. Average one-way flight prices are about $942, which is 42% above the typical average for this route.

What is the time difference between Portland and Ko Samui?

Ko Samui is 14 hours ahead of Portland (Indochina Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at Ko Samui Airport (USM)?

Ko Samui Airport (USM) hosts 5 major car rental companies, with daily rates starting from around $14 for economy cars. Top options include: · Drive Car Rental · Alamo · Sixt · Enterprise Rent-A-Car · Hertz

How much should I expect to pay for a Portland to Ko Samui flight?

Round-trip flights from Portland to Ko Samui range from $1,282 to $1,322, with an average of $1,322 over the past 12 months. Anything below $1,282 counts as a good deal.

$604 CHEAP FLIGHTS from Portland to Ko Samui (PDX - USM)

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Cheapest round-trip

$993

Typical prices: $1,282-$1,322

Multiple Airlines

Fri 9/14Thu 9/20

PDX - USM • 2 stops

Cheapest one-way

$604

Typical prices: $661-$661

Multiple Airlines

Sat 2/3

PDX - USM • 3 stops

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We hope you love your trip to Ko Samui!

Flight Deals

Cheap Flights from Portland to Ko Samui (PDX-USM)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Portland to Ko Samui

Mon, Sep 14 - Sun, Sep 20

7:03 am - 7:40 pmPDX Portland-USM Ko Samui

46h 37m2 stops San Francisco Hong Kong Intl

11:55 am - 10:09 amUSM Ko Samui-PDX Portland

36h 14m2 stops Hong Kong Intl San Francisco

$993Multiple Airlines

Sun, Nov 1 - Sat, Nov 28

10:35 am - 7:35 amPDX Portland-USM Ko Samui

54h 00m3 stops Seattle/Tacoma Intl Hong Kong Intl Bangkok Suvarnabhumi

7:10 pm - 1:29 pmUSM Ko Samui-PDX Portland

57h 19m3 stops Bangkok Suvarnabhumi Hong Kong Intl Seattle/Tacoma Intl

$1,345Multiple Airlines

Mon, Sep 14 - Sun, Sep 20

5:55 pm - 7:40 pmPDX Portland-USM Ko Samui

35h 45m2 stops Los Angeles Hong Kong Intl

8:45 am - 8:36 pmUSM Ko Samui-PDX Portland

25h 51m3 stops Bangkok Suvarnabhumi Hong Kong Intl Los Angeles

$1,659Cathay Pacific

Mon, Sep 14 - Sun, Sep 20

3:00 pm - 2:45 pmPDX Portland-USM Ko Samui

33h 45m3 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl Bangkok Suvarnabhumi

2:35 pm - 10:58 pmUSM Ko Samui-PDX Portland

22h 23m3 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl Seattle/Tacoma Intl

$1,661Multiple Airlines

Sun, Nov 1 - Sat, Nov 28

6:04 pm - 7:35 pmPDX Portland-USM Ko Samui

34h 31m2 stops Los Angeles Hong Kong Intl

11:40 am - 8:47 pmUSM Ko Samui-PDX Portland

24h 07m2 stops Hong Kong Intl Los Angeles

$1,870Multiple Airlines

Sun, Nov 1 - Sat, Nov 28

5:43 pm - 12:35 pmPDX Portland-USM Ko Samui

27h 52m3 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl Bangkok Suvarnabhumi

7:10 pm - 9:26 amUSM Ko Samui-PDX Portland

29h 16m2 stops Bangkok Suvarnabhumi Vancouver Intl

$2,339Multiple Airlines

Tue, Dec 1 - Fri, Dec 11

5:40 pm - 3:35 pmPDX Portland-USM Ko Samui

30h 55m3 stops Los Angeles Hong Kong Intl Bangkok Suvarnabhumi

4:30 pm - 9:46 amUSM Ko Samui-PDX Portland

32h 16m3 stops Bangkok Suvarnabhumi Hong Kong Intl San Francisco

$2,553Multiple Airlines

Mon, Sep 14 - Thu, Sep 17

10:29 am - 7:40 pmPDX Portland-USM Ko Samui

43h 11m2 stops Vancouver Intl Hong Kong Intl

11:55 am - 9:48 amUSM Ko Samui-PDX Portland

35h 53m2 stops Hong Kong Intl Vancouver Intl

$2,558Cathay Pacific

Tue, Dec 1 - Fri, Dec 11

6:00 am - 7:10 amPDX Portland-USM Ko Samui

34h 10m3 stops Los Angeles Taipei City Taiwan Taoyuan Intl Bangkok Suvarnabhumi

9:10 pm - 4:50 pmUSM Ko Samui-PDX Portland

34h 40m3 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl San Francisco

$2,612Multiple Airlines

Tue, Dec 1 - Fri, Dec 11

9:35 pm - 9:05 pmPDX Portland-USM Ko Samui

32h 30m2 stops Newark Singapore Changi

4:25 pm - 8:08 pmUSM Ko Samui-PDX Portland

66h 43m2 stops Singapore Changi New York John F Kennedy Intl

$2,758Multiple Airlines

Booking Insights

Price, demand and travel trends for Portland to Ko Samui flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Portland to Ko Samui with more confidence.

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

Cathay Pacific ($1,659) offered the cheapest round-trip ticket from Portland to Ko Samui in the last 5 days.

Find deals

Expert advice

Our travel experts

Harriet Baskas

Expert on Alaska Airlines and JetBlue

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Cheapest flight	$604

Flight from Portland to Ko Samui

When to book flights from Portland to Ko Samui

Are your dates flexible? Find out the best times to travel from Portland to Ko Samui based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Which airports can I use when flying from Portland to Ko Samui?
Flights from Portland to Ko Samui usually depart from Portland (PDX) and arrive at Ko Samui (USM).
What cabin classes can I book on flights from Portland to Ko Samui?
Two cabin classes are available on flights from Portland to Ko Samui:

• Premium Economy Class
• Business Class
Can I save money by using flexible dates for flights from Portland to Ko Samui?
Yes. Being flexible with your travel dates can save you up to 33% on the Portland to Ko Samui route. Monday is the cheapest departure day at $1,220 round-trip on average, while Tuesday is the most expensive at $1,811, a difference of $591. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
What popular places can I visit in Ko Samui?
Some of the most popular sights in Ko Samui are Lamai Beach, Chaweng Beach and Fishermans Village. These are among the most viewed places in Ko Samui on KAYAK.
Do I need a passport to fly from Portland to Ko Samui?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
Have flight prices from Portland to Ko Samui changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $993 to $5,237. That means the highest observed fare was about 5x higher than the lowest one.
How are flight prices from Portland to Ko Samui looking right now?
One-way fares from Portland to Ko Samui are currently higher than usual. Average one-way flight prices are about $942, which is 42% above the typical average for this route.
What is the time difference between Portland and Ko Samui?
Ko Samui is 14 hours ahead of Portland (Indochina Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.
What car rental options are available at Ko Samui Airport (USM)?
Ko Samui Airport (USM) hosts 5 major car rental companies, with daily rates starting from around $14 for economy cars. Top options include:
· Drive Car Rental
· Alamo
· Sixt
· Enterprise Rent-A-Car
· Hertz
How much should I expect to pay for a Portland to Ko Samui flight?
Round-trip flights from Portland to Ko Samui range from $1,282 to $1,322, with an average of $1,322 over the past 12 months. Anything below $1,282 counts as a good deal.

If your dates can be flexible, aim for a Monday departure instead of Tuesday. On this route, Monday flights average $1,220 - about $591 less than Tuesday (33% savings) based on the last 12 months.
If you're arriving late at night and need somewhere to stay, check out these hotels close to Ko Samui Airport.
- Ozo Chaweng Samui - Sha Extra Plus
- Amari Koh Samui
- Hyatt Regency Koh Samui

Everything you need to know for your flight from Portland to Ko Samui

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Portland (PDX)

Ko Samui (USM)

PDX - USM

$604 Find Cheap Flights from Portland to Ko Samui - Compare and Save

Everything you should know

Cheap Flights from Portland to Ko Samui (PDX-USM)

Recent round-trip flight deals from Portland to Ko Samui

Recent one-way flight deals from Portland to Ko Samui

Recent last minute flight deals from Portland to Ko Samui

Price, demand and travel trends for Portland to Ko Samui flights

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

Expert advice for your flight from Portland to Ko Samui

Key details for Portland to Ko Samui flights

Cheapest flight

When to book flights from Portland to Ko Samui

Your Portland to Ko Samui flight questions, answered

Your guide to booking Portland to Ko Samui flights

Everything you need to know for your flight from Portland to Ko Samui

Information on your arrival and departure airports

Cabin class types available on flights from Portland to Ko Samui

Complete your trip to Ko Samui with a hotel stay or car rental

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