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 2025/26

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0 bags

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Find the cheapest flights from Portland to Ko Samui

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:35 pm - 3:35 pm

PDX

USM

31h 00m3 stops

8:30 pm - 10:46 pm

USM

PDX

41h 16m3 stops

$1,189Multiple Airlines

Thu, Jan 22 - Tue, Jan 27

9:50 am - 1:05 pm

PDX

USM

36h 15m2 stops

7:45 pm - 9:15 am

USM

PDX

28h 30m2 stops

$1,221Multiple Airlines

Sun, Feb 1 - Sat, Feb 14

9:50 am - 1:05 pm

PDX

USM

36h 15m2 stops

7:45 pm - 6:30 pm

USM

PDX

37h 45m2 stops

$1,230Multiple Airlines

Sun, Feb 1 - Sat, Feb 14

9:30 pm - 7:35 pm

PDX

USM

55h 05m2 stops

11:40 am - 9:35 am

USM

PDX

36h 55m2 stops

$1,390Cathay Pacific

Thu, Jan 22 - Tue, Jan 27

2:57 pm - 7:35 pm

PDX

USM

37h 38m2 stops

7:10 pm - 4:50 pm

USM

PDX

36h 40m3 stops

$1,393Multiple Airlines

Wed, Feb 4 - Wed, Feb 18

7:00 pm - 3:35 pm

PDX

USM

29h 35m2 stops

7:30 pm - 9:15 am

USM

PDX

28h 45m2 stops

$1,394Multiple Airlines

Thu, Jan 22 - Tue, Jan 27

1:38 pm - 3:35 pm

PDX

USM

34h 57m3 stops

2:05 pm - 10:41 pm

USM

PDX

23h 36m3 stops

$1,418Multiple Airlines

Sun, Feb 1 - Sat, Feb 14

3:15 pm - 9:20 am

PDX

USM

27h 05m2 stops

8:20 pm - 9:15 am

USM

PDX

27h 55m2 stops

$1,424Multiple Airlines

Wed, Feb 4 - Wed, Feb 18

7:05 pm - 9:20 am

PDX

USM

23h 15m2 stops

8:30 pm - 9:15 am

USM

PDX

27h 45m2 stops

$1,433Multiple Airlines

Wed, Feb 4 - Wed, Feb 18

5:51 pm - 7:35 pm

PDX

USM

34h 44m2 stops

11:40 am - 1:41 pm

USM

PDX

41h 01m2 stops

$1,473Cathay Pacific

Thu, Jan 22 - Tue, Jan 27

Cathay Pacific flights from Portland to Ko Samui

Our best Cathay Pacific deals on Portland to Ko Samui flight tickets

Cathay Pacific

Jan 22

PDX4:51 pmPortland

35h 44m

2 stops

USM7:35 pmKo Samui

Jan 27

USM11:40 amKo Samui

36h 55m

2 stops

PDX9:35 amPortland

$1,462

Find similar

Cathay Pacific

Jan 22

PDX5:51 pmPortland

34h 44m

2 stops

USM7:35 pmKo Samui

Jan 27

USM11:40 amKo Samui

41h 01m

2 stops

PDX1:41 pmPortland

$1,473

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Thu 1/22

5:35 pm-3:35 pm

3 stops31h 00m

Ko Samui

Tue 1/27

8:30 pm-10:46 pm

3 stops41h 16m

$1,189

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Sun 2/1

9:50 am-1:05 pm

2 stops36h 15m

Ko Samui

Sat 2/14

7:45 pm-9:15 am

2 stops28h 30m

$1,221

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Sun 2/1

9:50 am-1:05 pm

2 stops36h 15m

Ko Samui

Sat 2/14

7:45 pm-6:30 pm

2 stops37h 45m

$1,230

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Thu 1/22

9:30 pm-7:35 pm

2 stops55h 05m

Ko Samui

Tue 1/27

11:40 am-9:35 am

2 stops36h 55m

$1,390

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Wed 2/4

2:57 pm-7:35 pm

2 stops37h 38m

Ko Samui

Wed 2/18

7:10 pm-4:50 pm

3 stops36h 40m

$1,393

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Thu 1/22

7:00 pm-3:35 pm

2 stops29h 35m

Ko Samui

Tue 1/27

7:30 pm-9:15 am

2 stops28h 45m

$1,394

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Sun 2/1

1:38 pm-3:35 pm

3 stops34h 57m

Ko Samui

Sat 2/14

2:05 pm-10:41 pm

3 stops23h 36m

$1,418

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Wed 2/4

3:15 pm-9:20 am

2 stops27h 05m

Ko Samui

Wed 2/18

8:20 pm-9:15 am

2 stops27h 55m

$1,424

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Wed 2/4

7:05 pm-9:20 am

2 stops23h 15m

Ko Samui

Wed 2/18

8:30 pm-9:15 am

2 stops27h 45m

$1,433

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Thu 1/22

5:51 pm-7:35 pm

2 stops34h 44m

Ko Samui

Tue 1/27

11:40 am-1:41 pm

2 stops41h 01m

$1,473

Flights are sorted by cheapest round-trip flights first.

Sorted 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	31h 00m
Direct flights	None

The fastest flight from Portland to Ko Samui takes 31h 00m

There are no direct flights from Portland to Ko Samui. There are no popular flight routes from Portland to Ko Samui.

Search flight deals

How far is Portland to Ko Samui by plane?
There are 7797.0 mi between Portland and Ko Samui. 31h 00m 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.