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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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 pmPDX-USM

31h 00m3 stops

2:05 pm - 12:09 amUSM-PDX

25h 04m3 stops

$1,203Multiple Airlines

Find Deal

Thu, Jan 22 - Tue, Jan 27

9:50 am - 9:20 amPDX-USM

32h 30m2 stops

9:10 pm - 9:15 amUSM-PDX

26h 05m2 stops

$1,224Multiple Airlines

Find Deal

Sun, Mar 1 - Tue, Mar 10

2:38 pm - 3:35 pmPDX-USM

33h 57m3 stops

2:05 pm - 8:47 pmUSM-PDX

21h 42m3 stops

$1,236Multiple Airlines

Find Deal

Sat, Jan 24 - Sat, Jan 31

5:35 pm - 3:35 pmPDX-USM

31h 00m3 stops

2:05 pm - 12:09 amUSM-PDX

25h 04m3 stops

$1,240Multiple Airlines

Find Deal

Thu, Jan 22 - Tue, Jan 27

5:35 pm - 3:35 pmPDX-USM

31h 00m3 stops

2:05 pm - 12:09 amUSM-PDX

25h 04m3 stops

$1,260Multiple Airlines

Find Deal

Thu, Jan 22 - Tue, Jan 27

5:50 pm - 7:35 pmPDX-USM

34h 45m2 stops

11:40 am - 1:41 pmUSM-PDX

41h 01m2 stops

$1,341Cathay Pacific

Find Deal

Thu, Jan 22 - Tue, Jan 27

9:15 pm - 7:10 amPDX-USM

42h 55m3 stops

11:40 am - 4:28 pmUSM-PDX

42h 48m2 stops

$1,377Cathay Pacific

Find Deal

Sun, Mar 1 - Tue, Mar 10

10:52 am - 10:40 amPDX-USM

32h 48m3 stops

8:20 pm - 4:40 pmUSM-PDX

35h 20m3 stops

$1,736Qatar Airways

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Wed, Feb 4 - Wed, Feb 18

7:30 am - 6:15 pmPDX-USM

43h 45m3 stops

1:25 pm - 10:55 amUSM-PDX

36h 30m2 stops

$2,628Singapore Airlines

Find Deal

Sat, Jan 24 - Sat, Jan 31

7:30 am - 6:15 pmPDX-USM

43h 45m3 stops

1:25 pm - 10:55 amUSM-PDX

36h 30m2 stops

$2,869Singapore Airlines

Find Deal

Sat, Jan 24 - Sat, Jan 31

Cathay Pacific flights from Portland to Ko Samui

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

Cathay Pacific

Jan 22

PDX5:50 pmPortland

34h 45m

2 stops

USM7:35 pmKo Samui

Jan 27

USM11:40 amKo Samui

41h 01m

2 stops

PDX1:41 pmPortland

$1,341

Find similar

Cathay Pacific

Mar 1

PDX9:15 pmPortland

42h 55m

3 stops

USM7:10 amKo Samui

Mar 10

USM11:40 amKo Samui

42h 48m

2 stops

PDX4:28 pmPortland

$1,377

Find similar

Cathay Pacific

Nov 13

PDX7:00 amPortland

45h 35m

2 stops

USM7:35 pmKo Samui

Nov 17

USM11:40 amKo Samui

48h 10m

2 stops

PDX8:50 pmPortland

$1,391

Find similar

Singapore Airlines flights from Portland to Ko Samui

Our best Singapore Airlines deals on Portland to Ko Samui flight tickets

Singapore Airlines

Jan 24

PDX7:30 amPortland

43h 45m

3 stops

USM6:15 pmKo Samui

Jan 31

USM1:25 pmKo Samui

36h 30m

2 stops

PDX10:55 amPortland

$2,628

Find similar

Singapore Airlines

Jan 24

PDX7:30 amPortland

43h 45m

3 stops

USM6:15 pmKo Samui

Jan 31

USM1:25 pmKo Samui

36h 30m

2 stops

PDX10:55 amPortland

$2,869

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

2:05 pm-12:09 am

3 stops25h 04m

$1,203

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Sun 3/1

9:50 am-9:20 am

2 stops32h 30m

Ko Samui

Tue 3/10

9:10 pm-9:15 am

2 stops26h 05m

$1,224

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Sat 1/24

2:38 pm-3:35 pm

3 stops33h 57m

Ko Samui

Sat 1/31

2:05 pm-8:47 pm

3 stops21h 42m

$1,236

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Thu 1/22

5:35 pm-3:35 pm

3 stops31h 00m

Ko Samui

Tue 1/27

2:05 pm-12:09 am

3 stops25h 04m

$1,240

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Thu 1/22

5:35 pm-3:35 pm

3 stops31h 00m

Ko Samui

Tue 1/27

2:05 pm-12:09 am

3 stops25h 04m

$1,260

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Thu 1/22

5:50 pm-7:35 pm

2 stops34h 45m

Ko Samui

Tue 1/27

11:40 am-1:41 pm

2 stops41h 01m

$1,341

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Sun 3/1

9:15 pm-7:10 am

3 stops42h 55m

Ko Samui

Tue 3/10

11:40 am-4:28 pm

2 stops42h 48m

$1,377

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Wed 2/4

10:52 am-10:40 am

3 stops32h 48m

Ko Samui

Wed 2/18

8:20 pm-4:40 pm

3 stops35h 20m

$1,736

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Sat 1/24

7:30 am-6:15 pm

3 stops43h 45m

Ko Samui

Sat 1/31

1:25 pm-10:55 am

2 stops36h 30m

$2,628

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Sat 1/24

7:30 am-6:15 pm

3 stops43h 45m

Ko Samui

Sat 1/31

1:25 pm-10:55 am

2 stops36h 30m

$2,869

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

Direct flights	None

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. 25h 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 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.