PDX - USM

$738 Find Cheap Flights from Portland to Ko Samui - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$1,019
Typical prices: $1,282-$1,322
Multiple Airlines
Sat 10/20Sat 10/27
PDX - USM • 2 stops
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Flight Deals

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

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

Recent round-trip flight deals from Portland to Ko Samui

Tue, Oct 20 - Tue, Oct 27
Multiple Airlines Logo
7:18 am - 7:40 pmPDX  Portland-USM Ko Samui
46h 22m2 stops San Francisco Hong Kong Intl
Multiple Airlines Logo
11:40 am - 9:29 amUSM  Ko Samui-PDX Portland
35h 49m2 stops Hong Kong Intl San Francisco
$1,019Multiple Airlines
Sat, Feb 27 - Thu, Mar 11
Multiple Airlines Logo
9:50 pm - 7:35 pmPDX  Portland-USM Ko Samui
54h 45m2 stops San Francisco Hong Kong Intl
Multiple Airlines Logo
11:40 am - 11:54 pmUSM  Ko Samui-PDX Portland
27h 14m2 stops Hong Kong Intl Los Angeles
$1,071Multiple Airlines
Sun, Nov 1 - Thu, Nov 26
Multiple Airlines Logo
5:04 pm - 7:35 pmPDX  Portland-USM Ko Samui
35h 31m2 stops Los Angeles Hong Kong Intl
Multiple Airlines Logo
11:40 am - 10:36 amUSM  Ko Samui-PDX Portland
37h 56m2 stops Hong Kong Intl Los Angeles
$1,099Multiple Airlines
Tue, Oct 20 - Tue, Oct 27
Multiple Airlines Logo
6:18 pm - 7:40 pmPDX  Portland-USM Ko Samui
35h 22m2 stops Los Angeles Hong Kong Intl
Multiple Airlines Logo
9:30 pm - 1:24 pmUSM  Ko Samui-PDX Portland
29h 54m3 stops Bangkok Suvarnabhumi Hong Kong Intl Seattle/Tacoma Intl
$1,163Multiple Airlines
Fri, Oct 23 - Fri, Oct 30
Multiple Airlines Logo
6:18 pm - 7:35 pmPDX  Portland-USM Ko Samui
35h 17m2 stops Los Angeles Hong Kong Intl
Multiple Airlines Logo
11:40 am - 9:29 amUSM  Ko Samui-PDX Portland
35h 49m2 stops Hong Kong Intl San Francisco
$1,180Multiple Airlines
Sun, Nov 1 - Tue, Dec 1
Multiple Airlines Logo
6:04 pm - 7:35 pmPDX  Portland-USM Ko Samui
34h 31m2 stops Los Angeles Hong Kong Intl
Multiple Airlines Logo
11:40 am - 1:48 pmUSM  Ko Samui-PDX Portland
41h 08m2 stops Hong Kong Intl Los Angeles
$1,198Multiple Airlines
Sat, Feb 27 - Thu, Mar 11
Multiple Airlines Logo
9:30 pm - 7:10 amPDX  Portland-USM Ko Samui
42h 40m3 stops Los Angeles Hong Kong Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
4:30 pm - 9:46 amUSM  Ko Samui-PDX Portland
32h 16m3 stops Bangkok Suvarnabhumi Hong Kong Intl San Francisco
$1,213Multiple Airlines
Sun, Nov 1 - Thu, Nov 26
Multiple Airlines Logo
5:04 pm - 7:35 pmPDX  Portland-USM Ko Samui
35h 31m2 stops Los Angeles Hong Kong Intl
Multiple Airlines Logo
11:40 am - 9:43 amUSM  Ko Samui-PDX Portland
37h 03m3 stops Hong Kong Intl Vancouver Intl Seattle/Tacoma Intl
$1,260Multiple Airlines
Sun, Nov 1 - Thu, Nov 26
Multiple Airlines Logo
1:35 pm - 7:35 pmPDX  Portland-USM Ko Samui
39h 00m2 stops Los Angeles Hong Kong Intl
Multiple Airlines Logo
9:10 pm - 9:26 amUSM  Ko Samui-PDX Portland
27h 16m2 stops Bangkok Suvarnabhumi Vancouver Intl
$1,279Multiple Airlines
Fri, Oct 23 - Fri, Oct 30
Multiple Airlines Logo
5:18 pm - 7:35 pmPDX  Portland-USM Ko Samui
36h 17m2 stops Los Angeles Hong Kong Intl
Multiple Airlines Logo
9:10 pm - 1:24 pmUSM  Ko Samui-PDX Portland
30h 14m3 stops Bangkok Suvarnabhumi Hong Kong Intl Seattle/Tacoma Intl
$1,310Multiple Airlines
Useful Info
Expert advice

Expert advice for your flight from Portland to Ko Samui

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Harriet Baskas

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.

Read more

Key details for Portland to Ko Samui flights

Cheapest flight

$1,019
Round-trip 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

Your Portland to Ko Samui flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • 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:

    • Economy Class
    • Premium Economy Class

  • 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.

  • 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.

  • 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 $1,019 to $7,727. That means the highest observed fare was about 8x higher than the lowest one.

  • 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

  • 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).

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

    Yes. Flexible dates can save you up to 33% on flights from Portland to Ko Samui. 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 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 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.

Your guide to booking Portland to Ko Samui flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Monday departure and avoid flying on Tuesday. On this route, Monday flights average $1,220, about $591 less than Tuesday fares (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
    • Melia Koh Samui
    • Amari Koh Samui

More options for your flight from Portland to Ko Samui

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

Car rentals in Ko Samui
Hotels in Ko Samui
Vacations in Ko Samui