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Cheap flights from Portland to Ko Samui from $822

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 8/2. 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
0 bags

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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
3:30 pm - 8:35 am
PDX
-
USM
27h 05m
2 stops
Multiple Airlines Logo
7:10 pm - 9:31 am
USM
-
PDX
28h 21m
2 stops
$1,388Multiple Airlines
Wed, Jul 22 - Thu, Aug 6
Multiple Airlines Logo
3:30 pm - 8:15 am
PDX
-
USM
26h 45m
2 stops
Multiple Airlines Logo
8:50 pm - 9:31 am
USM
-
PDX
26h 41m
2 stops
$1,402Multiple Airlines
Wed, Jul 22 - Thu, Aug 6
Multiple Airlines Logo
7:45 pm - 8:15 am
PDX
-
USM
22h 30m
2 stops
Multiple Airlines Logo
4:25 pm - 2:45 pm
USM
-
PDX
36h 20m
2 stops
$1,503Multiple Airlines
Mon, Jun 1 - Mon, Jun 8
Multiple Airlines Logo
3:30 pm - 8:15 am
PDX
-
USM
26h 45m
2 stops
Multiple Airlines Logo
2:35 pm - 9:30 am
USM
-
PDX
32h 55m
3 stops
$1,867Multiple Airlines
Mon, Jun 1 - Mon, Jun 8
Multiple Airlines Logo
7:45 pm - 8:35 am
PDX
-
USM
22h 50m
2 stops
Multiple Airlines Logo
1:30 pm - 9:31 am
USM
-
PDX
34h 01m
2 stops
$1,971Multiple Airlines
Mon, Jun 15 - Mon, Jun 22
Multiple Airlines Logo
8:35 am - 7:40 pm
PDX
-
USM
45h 05m
2 stops
Multiple Airlines Logo
11:55 am - 10:48 pm
USM
-
PDX
48h 53m
2 stops
$2,029Multiple Airlines
Tue, Jul 21 - Fri, Aug 7
Multiple Airlines Logo
7:25 pm - 1:45 pm
PDX
-
USM
28h 20m
3 stops
Multiple Airlines Logo
8:50 pm - 11:59 pm
USM
-
PDX
41h 09m
3 stops
$2,067Multiple Airlines
Mon, Jun 1 - Mon, Jun 8
Multiple Airlines Logo
9:19 am - 7:10 am
PDX
-
USM
31h 51m
3 stops
Multiple Airlines Logo
8:50 pm - 1:06 pm
USM
-
PDX
30h 16m
3 stops
$2,172Multiple Airlines
Mon, Jun 15 - Mon, Jun 22
Multiple Airlines Logo
5:37 pm - 7:40 pm
PDX
-
USM
36h 03m
2 stops
Multiple Airlines Logo
6:55 pm - 1:06 pm
USM
-
PDX
56h 11m
3 stops
$2,195Multiple Airlines
Wed, Jul 22 - Thu, Aug 6
Qatar Airways Logo
9:19 am - 9:20 am
PDX
-
USM
34h 01m
3 stops
Qatar Airways Logo
7:10 pm - 4:55 pm
USM
-
PDX
35h 45m
3 stops
$2,249Qatar Airways
Wed, Jul 22 - Thu, Aug 6

Qatar Airways flights from Portland to Ko Samui

Our best Qatar Airways deals on Portland to Ko Samui flight tickets
Qatar Airways
Jul 22
PDX12:03 pmPortland
31h 17m
3 stops
USM9:20 amKo Samui
Aug 6
USM6:55 pmKo Samui
36h 00m
3 stops
PDX4:55 pmPortland
$2,249
Qatar Airways
Jul 22
PDX12:03 pmPortland
32h 42m
3 stops
USM10:45 amKo Samui
Aug 6
USM8:50 pmKo Samui
34h 05m
3 stops
PDX4:55 pmPortland
$2,269

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 May 12, 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 - USM

PDXUSM

Portland

Wed 7/22

3:30 pm-8:35 am

2 stops27h 05m

Ko Samui

Thu 8/6

7:10 pm-9:31 am

2 stops28h 21m

$1,388
Quickest round-trip

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Wed 7/22

3:30 pm-8:15 am

2 stops26h 45m

Ko Samui

Thu 8/6

8:50 pm-9:31 am

2 stops26h 41m

$1,402

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Mon 6/1

7:45 pm-8:15 am

2 stops22h 30m

Ko Samui

Mon 6/8

4:25 pm-2:45 pm

2 stops36h 20m

$1,503

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Mon 6/1

3:30 pm-8:15 am

2 stops26h 45m

Ko Samui

Mon 6/8

2:35 pm-9:30 am

3 stops32h 55m

$1,867

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Mon 6/15

7:45 pm-8:35 am

2 stops22h 50m

Ko Samui

Mon 6/22

1:30 pm-9:31 am

2 stops34h 01m

$1,971

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Tue 7/21

8:35 am-7:40 pm

2 stops45h 05m

Ko Samui

Fri 8/7

11:55 am-10:48 pm

2 stops48h 53m

$2,029

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Mon 6/1

7:25 pm-1:45 pm

3 stops28h 20m

Ko Samui

Mon 6/8

8:50 pm-11:59 pm

3 stops41h 09m

$2,067

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Mon 6/15

9:19 am-7:10 am

3 stops31h 51m

Ko Samui

Mon 6/22

8:50 pm-1:06 pm

3 stops30h 16m

$2,172

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Wed 7/22

5:37 pm-7:40 pm

2 stops36h 03m

Ko Samui

Thu 8/6

6:55 pm-1:06 pm

3 stops56h 11m

$2,195

PortlandKo Samui

PDX - USM

PDXUSM

Portland

Wed 7/22

9:19 am-9:20 am

3 stops34h 01m

Ko Samui

Thu 8/6

7:10 pm-4:55 pm

3 stops35h 45m

$2,249

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 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

22h 50m

Direct flights

None
The fastest flight from Portland to Ko Samui takes 22h 50m
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. 22h 50m 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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