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Siem Reap

$1,103+ Cheap flights from Portland (PDX) to Siem Reap

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SAI
Mar 3 — Mar 101
Tue 3/3
Tue 3/10
1 adult, Economy
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Cheap flight deals from Portland to Siem Reap

Cheapest flights from Portland to Siem Reap
Explore the most affordable flight options available from Portland to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 1, 2026.

This KAYAK deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:49 pm
PDX
-
SAI
2 stops29h 06m
Singapore Airlines
Sun 11/2910:45 am
SAI
-
PDX
2 stops53h 09m
Singapore Airlines
Deal found 2/1$1,103
This United Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/143:45 pm
PDX
-
SAI
2 stops58h 10m
United Airlines
Tue 3/244:45 pm
SAI
-
PDX
2 stops36h 14m
United Airlines
Deal found 1/30$1,141
This Gotogate deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/23:15 pm
PDX
-
SAI
2 stops27h 00m
Multiple Airlines
Sat 11/287:25 pm
SAI
-
PDX
2 stops29h 00m
Multiple Airlines
Deal found 2/1$1,201
This Ovago deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/310:30 am
PDX
-
SAI
3 stops31h 45m
Multiple Airlines
Sun 11/2910:45 am
SAI
-
PDX
2 stops53h 09m
Multiple Airlines
Deal found 2/1$1,251
This KAYAK deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/147:57 pm
PDX
-
SAI
3 stops27h 18m
Multiple Airlines
Tue 3/241:20 pm
SAI
-
PDX
3 stops22h 18m
Multiple Airlines
Deal found 1/30$1,335
This oojo deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:00 am
PDX
-
SAI
3 stops35h 50m
Singapore Airlines
Sat 11/2810:45 am
SAI
-
PDX
2 stops26h 48m
Singapore Airlines
Deal found 2/1$1,470
This Qatar Airways deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/211:57 am
PDX
-
SAI
3 stops30h 18m
Qatar Airways
Sat 11/287:25 pm
SAI
-
PDX
3 stops38h 50m
Qatar Airways
Deal found 2/1$2,281

Find flight deals from Portland to Siem Reap

Keep the following information in mind while searching for Portland to Siem Reap flight deals. Data was last updated February 1, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$1,141
(United Airlines)
Provider with most accurate pricing for Portland-Siem Reap–Angkor Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Siem Reap–Angkor Intl flights.
Search Deals
From Portland to Siem Reap
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Siem Reap 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, Cheapflights users made 2,558,603 searches. Data last updated February 1, 2026.
Use the filters below to find and compare flights from Portland to Siem Reap that are best for you.

Fly from

Portland

Fly to

Siem Reap

Route

Depart

Return

Price

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Sat 3/14

3:45 pm-3:55 pm

2 stops58h 10m

Siem Reap–Angkor Intl

Tue 3/24

4:45 pm-2:59 pm

2 stops36h 14m

$1,141

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Sat 3/14

5:39 pm-9:50 am

3 stops50h 11m

Siem Reap–Angkor Intl

Tue 3/24

4:45 pm-1:50 pm

2 stops35h 05m

$1,556

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/30

Best time to book a flight from Portland to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Siem Reap
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Portland to Siem Reap. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Portland to Siem Reap?

    For a flight from Portland to Siem Reap, you will be flying from Portland. Portland (PDX) is just 6.0 mi from the center of the city.

  • How long is the flight from Portland to Region of Siem Reap?

    For as low as $1,141, United Airlines can have you in Region of Siem Reap from Portland in 58h 10m. Airlines will cover a distance of 7422 mi.

  • Can I find deals for flights from Portland to Siem Reap that include hotel bookings?

    Yes. In addition to deals on Portland to Siem Reap flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Siem Reap?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Siem Reap.

  • Can I find deals for business class flights from Portland to Siem Reap?

    Yes. Cheapflights offers flight deals from Portland to Siem Reap by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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