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.

$128 Cheap Flights from Portland to Ko Samui in 2026

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Find the cheapest flights from Portland to Ko Samui

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:30 am - 9:10 pm

PDX

USM

25h 40m

2 stops

4:25 pm - 2:31 pm

USM

PDX

36h 06m

2 stops

$1,336Multiple Airlines

Thu, Apr 2 - Sun, Apr 12

10:30 am - 9:35 pm

PDX

USM

45h 05m

3 stops

7:55 pm - 2:44 pm

USM

PDX

32h 49m

3 stops

$1,435Multiple Airlines

Thu, Apr 2 - Sun, Apr 12

7:05 pm - 8:10 am

PDX

USM

23h 05m

2 stops

8:20 pm - 9:15 am

USM

PDX

26h 55m

2 stops

$1,504Multiple Airlines

Thu, Mar 19 - Thu, Mar 26

7:05 pm - 8:10 am

PDX

USM

23h 05m

2 stops

8:20 pm - 9:15 am

USM

PDX

26h 55m

2 stops

$1,505Multiple Airlines

Thu, Mar 19 - Thu, Mar 26

7:30 am - 6:15 pm

PDX

USM

43h 45m

2 stops

1:25 pm - 2:48 pm

USM

PDX

40h 23m

2 stops

$1,545Multiple Airlines

Fri, Feb 20 - Sat, Feb 28

7:05 am - 7:45 am

PDX

USM

33h 40m

3 stops

6:40 pm - 8:53 pm

USM

PDX

41h 13m

3 stops

$1,587Multiple Airlines

Sun, Feb 15 - Fri, Feb 27

7:27 pm - 2:55 pm

PDX

USM

29h 28m

3 stops

2:05 pm - 9:38 pm

USM

PDX

21h 33m

3 stops

$1,590Multiple Airlines

Thu, Mar 19 - Thu, Mar 26

5:45 pm - 2:55 pm

PDX

USM

31h 10m

3 stops

2:05 pm - 9:38 pm

USM

PDX

21h 33m

3 stops

$1,627Multiple Airlines

Thu, Mar 19 - Thu, Mar 26

7:05 am - 8:10 am

PDX

USM

34h 05m

3 stops

7:30 pm - 4:50 pm

USM

PDX

36h 20m

3 stops

$1,771Multiple Airlines

Fri, Feb 20 - Sat, Feb 28

7:05 pm - 1:10 pm

PDX

USM

28h 05m

2 stops

7:10 pm - 6:30 pm

USM

PDX

37h 20m

3 stops

$1,955Multiple Airlines

Thu, Apr 2 - Sun, Apr 12

Fly from

Fly to

Route

Depart

Return

Price

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Thu 4/2

5:30 am-9:10 pm

2 stops25h 40m

Ko Samui

Sun 4/12

4:25 pm-2:31 pm

2 stops36h 06m

$1,336

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Thu 4/2

10:30 am-9:35 pm

3 stops45h 05m

Ko Samui

Sun 4/12

7:55 pm-2:44 pm

3 stops32h 49m

$1,435

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Thu 3/19

7:05 pm-8:10 am

2 stops23h 05m

Ko Samui

Thu 3/26

8:20 pm-9:15 am

2 stops26h 55m

$1,504

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Thu 3/19

7:05 pm-8:10 am

2 stops23h 05m

Ko Samui

Thu 3/26

8:20 pm-9:15 am

2 stops26h 55m

$1,505

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Fri 2/20

7:30 am-6:15 pm

2 stops43h 45m

Ko Samui

Sat 2/28

1:25 pm-2:48 pm

2 stops40h 23m

$1,545

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Sun 2/15

7:05 am-7:45 am

3 stops33h 40m

Ko Samui

Fri 2/27

6:40 pm-8:53 pm

3 stops41h 13m

$1,587

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Thu 3/19

7:27 pm-2:55 pm

3 stops29h 28m

Ko Samui

Thu 3/26

2:05 pm-9:38 pm

3 stops21h 33m

$1,590

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Thu 3/19

5:45 pm-2:55 pm

3 stops31h 10m

Ko Samui

Thu 3/26

2:05 pm-9:38 pm

3 stops21h 33m

$1,627

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Fri 2/20

7:05 am-8:10 am

3 stops34h 05m

Ko Samui

Sat 2/28

7:30 pm-4:50 pm

3 stops36h 20m

$1,771

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Thu 4/2

7:05 pm-1:10 pm

2 stops28h 05m

Ko Samui

Sun 4/12

7:10 pm-6:30 pm

3 stops37h 20m

$1,955

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first

How to get the cheapest flight ticket from Portland to Ko Samui

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Ko Samui?

Our data shows that Friday is the least expensive day to fly to Ko Samui. Tickets to fly out on this day can be as low as $243. Flights from Portland to Ko Samui on a Saturday will generally be more expensive and average around $496. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Ko Samui?

Our data shows that the cheapest Portland to Ko Samui flights are usually those with departure times in the morning. Our users have found flights to Ko Samui in the morning for as low as $168. At noon is when there is more demand to fly to Ko Samui, so prices are often more expensive at around $508 per ticket.

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	23h 05m
Direct flights	None

The fastest flight from Portland to Ko Samui takes 23h 05m

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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How far is Portland to Ko Samui by plane?
There are 7797.0 mi between Portland and Ko Samui. 23h 05m 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.

Ko Tao

Ko Pha Ngan

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.