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Cheap flights from Portland to Ko Samui from $806

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Ko Samui departing on 1/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Portland to Ko Samui

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:45 pm - 1:10 pmPDX  Portland-USM Ko Samui
27h 25m3 stops Vancouver Intl Hong Kong Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
8:50 pm - 9:31 amUSM  Ko Samui-PDX Portland
26h 41m2 stops Bangkok Suvarnabhumi Vancouver Intl
$1,167Multiple Airlines
Sun, Aug 30 - Sun, Sep 27
Multiple Airlines Logo
7:45 pm - 1:10 pmPDX  Portland-USM Ko Samui
27h 25m3 stops Vancouver Intl Hong Kong Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
8:50 pm - 9:31 amUSM  Ko Samui-PDX Portland
26h 41m2 stops Bangkok Suvarnabhumi Vancouver Intl
$1,174Multiple Airlines
Sun, Aug 30 - Sun, Sep 27
Multiple Airlines Logo
7:10 pm - 9:20 amPDX  Portland-USM Ko Samui
23h 10m2 stops Vancouver Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
8:30 pm - 9:26 amUSM  Ko Samui-PDX Portland
27h 56m2 stops Bangkok Suvarnabhumi Vancouver Intl
$1,281Multiple Airlines
Tue, Jan 26 - Wed, Feb 17
Multiple Airlines Logo
7:10 pm - 9:20 amPDX  Portland-USM Ko Samui
23h 10m2 stops Vancouver Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
9:30 pm - 9:26 amUSM  Ko Samui-PDX Portland
26h 56m2 stops Bangkok Suvarnabhumi Vancouver Intl
$1,330Multiple Airlines
Mon, Jan 25 - Tue, Feb 16
Multiple Airlines Logo
3:15 pm - 12:35 pmPDX  Portland-USM Ko Samui
30h 20m2 stops Vancouver Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
7:40 pm - 9:26 amUSM  Ko Samui-PDX Portland
28h 46m2 stops Bangkok Suvarnabhumi Vancouver Intl
$1,339Multiple Airlines
Tue, Dec 1 - Tue, Dec 8
Multiple Airlines Logo
1:50 pm - 2:55 pmPDX  Portland-USM Ko Samui
34h 05m3 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
2:05 pm - 9:13 pmUSM  Ko Samui-PDX Portland
22h 08m3 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl Seattle/Tacoma Intl
$1,378Multiple Airlines
Tue, Dec 1 - Tue, Dec 8
Multiple Airlines Logo
7:10 pm - 9:20 amPDX  Portland-USM Ko Samui
23h 10m2 stops Vancouver Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
9:10 pm - 9:26 amUSM  Ko Samui-PDX Portland
27h 16m2 stops Bangkok Suvarnabhumi Vancouver Intl
$1,424Multiple Airlines
Thu, Jan 28 - Mon, Feb 15
Multiple Airlines Logo
7:45 pm - 7:40 pmPDX  Portland-USM Ko Samui
33h 55m2 stops Vancouver Intl Hong Kong Intl
Multiple Airlines Logo
6:55 pm - 9:31 amUSM  Ko Samui-PDX Portland
28h 36m2 stops Bangkok Suvarnabhumi Vancouver Intl
$1,437Multiple Airlines
Sun, Aug 30 - Sun, Sep 27
Multiple Airlines Logo
7:10 pm - 9:20 amPDX  Portland-USM Ko Samui
23h 10m2 stops Vancouver Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
9:30 pm - 9:26 amUSM  Ko Samui-PDX Portland
26h 56m2 stops Bangkok Suvarnabhumi Vancouver Intl
$1,518Multiple Airlines
Thu, Jan 28 - Thu, Feb 18
Multiple Airlines Logo
7:00 am - 7:55 amPDX  Portland-USM Ko Samui
33h 55m3 stops Vancouver Intl 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
$1,647Multiple Airlines
Wed, Jan 27 - Wed, Feb 17

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British Airways flights from Portland to Ko Samui

Our best British Airways deals on Portland to Ko Samui flight tickets
British Airways
Jan 25
PDX5:45 pmPortland
36h 20m
2 stops
USM9:05 pmKo Samui
Feb 14
USM1:25 pmKo Samui
41h 25m
2 stops
PDX3:50 pmPortland
$2,168
British Airways
Jan 24
PDX5:45 pmPortland
33h 30m
2 stops
USM6:15 pmKo Samui
Feb 14
USM1:25 pmKo Samui
41h 25m
2 stops
PDX3:50 pmPortland
$2,223
British Airways
Jan 24
PDX5:45 pmPortland
33h 30m
2 stops
USM6:15 pmKo Samui
Feb 18
USM1:25 pmKo Samui
41h 25m
2 stops
PDX3:50 pmPortland
$2,278

momondo 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, momondo users made 832,500 searches. Data last updated August 13, 2026.
Use the filters below to find and compare flights from Portland to Ko Samui that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandKo Samui

PDX Portland - USM Ko Samui

PDXUSM

Portland

Sun 8/30

7:45 pm-1:10 pm

3 stops27h 25m

Ko Samui

Sun 9/27

8:50 pm-9:31 am

2 stops26h 41m

$1,167

PortlandKo Samui

PDX Portland - USM Ko Samui

PDXUSM

Portland

Sun 8/30

7:45 pm-1:10 pm

3 stops27h 25m

Ko Samui

Sun 9/27

8:50 pm-9:31 am

2 stops26h 41m

$1,174

PortlandKo Samui

PDX Portland - USM Ko Samui

PDXUSM

Portland

Tue 1/26

7:10 pm-9:20 am

2 stops23h 10m

Ko Samui

Wed 2/17

8:30 pm-9:26 am

2 stops27h 56m

$1,281
Quickest round-trip

PortlandKo Samui

PDX Portland - USM Ko Samui

PDXUSM

Portland

Mon 1/25

7:10 pm-9:20 am

2 stops23h 10m

Ko Samui

Tue 2/16

9:30 pm-9:26 am

2 stops26h 56m

$1,330

PortlandKo Samui

PDX Portland - USM Ko Samui

PDXUSM

Portland

Tue 12/1

3:15 pm-12:35 pm

2 stops30h 20m

Ko Samui

Tue 12/8

7:40 pm-9:26 am

2 stops28h 46m

$1,339

PortlandKo Samui

PDX Portland - USM Ko Samui

PDXUSM

Portland

Tue 12/1

1:50 pm-2:55 pm

3 stops34h 05m

Ko Samui

Tue 12/8

2:05 pm-9:13 pm

3 stops22h 08m

$1,378

PortlandKo Samui

PDX Portland - USM Ko Samui

PDXUSM

Portland

Thu 1/28

7:10 pm-9:20 am

2 stops23h 10m

Ko Samui

Mon 2/15

9:10 pm-9:26 am

2 stops27h 16m

$1,424

PortlandKo Samui

PDX Portland - USM Ko Samui

PDXUSM

Portland

Sun 8/30

7:45 pm-7:40 pm

2 stops33h 55m

Ko Samui

Sun 9/27

6:55 pm-9:31 am

2 stops28h 36m

$1,437

PortlandKo Samui

PDX Portland - USM Ko Samui

PDXUSM

Portland

Thu 1/28

7:10 pm-9:20 am

2 stops23h 10m

Ko Samui

Thu 2/18

9:30 pm-9:26 am

2 stops26h 56m

$1,518

PortlandKo Samui

PDX Portland - USM Ko Samui

PDXUSM

Portland

Wed 1/27

7:00 am-7:55 am

3 stops33h 55m

Ko Samui

Wed 2/17

4:30 pm-9:46 am

3 stops32h 16m

$1,647

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
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When to book flights from Portland to Ko Samui

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to Ko Samui according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland to Ko Samui (PDX to USM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Ko Samui

Fastest flight time

25h 30m

Direct flights

None
The fastest flight from Portland to Ko Samui takes 25h 30m
There are no direct flights from Portland to Ko Samui. There are no popular flight routes from Portland to Ko Samui.
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Frequently asked questions about flying from Portland to Ko Samui

  • How far is Portland to Ko Samui by plane?

    There are 7797.0 mi between Portland and Ko Samui. 25h 30m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Portland Airport to Ko Samui Airport?

    Prices for flights from Portland Airport to Ko Samui Airport are updated daily.

  • How old do you have to be to fly from Portland Airport to Ko Samui Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to Ko Samui Airport.

  • What documentation or ID do you need to fly to Ko Samui Airport?

    The necessary travel and health documents for your Ko Samui Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from Portland to Ko Samui

  • How do I get Price Alerts for flights from Portland to Ko Samui?

    Confirm your travel details to search for the latest offers for flights from Portland to Ko Samui. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Portland to Ko Samui with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Traveling to a place near Ko Samui?

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

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Ko Samui?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ko Samui from Portland.

Can I find flights from Portland to Ko Samui with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Portland to Ko Samui flights to just show those with flexible booking policies.

How can momondo help me find flights from Portland to Ko Samui?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ko Samui from Portland.

I’m not ready to book a flight from Portland to Ko Samui right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Ko Samui, momondo offers a useful price alert feature which will track prices for flights to Ko Samui from Portland and alert you when they change.

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