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Cheap flights from Oregon to Siem Reap from $647

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Oregon to Siem Reap departing on 3/2. 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 Oregon to Siem Reap

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:05 am - 3:55 pm
PDX
-
SAI
42h 50m
2 stops
Multiple Airlines Logo
10:30 am - 12:35 pm
SAI
-
PDX
40h 05m
2 stops
$1,696Multiple Airlines
Thu, Mar 19 - Mon, Mar 30
Multiple Airlines Logo
9:35 pm - 9:50 am
PDX
-
SAI
46h 15m
2 stops
Multiple Airlines Logo
10:30 am - 8:50 pm
SAI
-
PDX
48h 20m
3 stops
$2,026Multiple Airlines
Thu, Mar 19 - Mon, Mar 30
Multiple Airlines Logo
2:42 pm - 9:15 am
PDX
-
SAI
28h 33m
3 stops
Multiple Airlines Logo
7:05 pm - 2:40 pm
SAI
-
PDX
33h 35m
3 stops
$3,343Multiple Airlines
Thu, Mar 19 - Mon, Mar 30

momondo Fare Finder

 
Customize your flight search to find flights from Oregon to Region of 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, momondo users made 832,500 searches. Data last updated February 8, 2026.
Use the filters below to find and compare flights from Oregon to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Thu 3/19

7:05 am-3:55 pm

2 stops42h 50m

Siem Reap–Angkor Intl

Mon 3/30

10:30 am-12:35 pm

2 stops40h 05m

$1,696

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Thu 3/19

9:35 pm-9:50 am

2 stops46h 15m

Siem Reap–Angkor Intl

Mon 3/30

10:30 am-8:50 pm

3 stops48h 20m

$2,026

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Thu 3/19

2:42 pm-9:15 am

3 stops28h 33m

Siem Reap–Angkor Intl

Mon 3/30

7:05 pm-2:40 pm

3 stops33h 35m

$3,343

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Mon 3/2

9:30 pm-9:15 am

3 stops68h 45m

$647

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Mon 3/2

7:57 pm-9:50 am

2 stops46h 53m

$848

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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How to get the cheapest flight ticket from Oregon to Region of Siem Reap

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

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

Average flight duration from Oregon to Region of Siem Reap depends on which airport you fly into and out of. Flying from Portland to Siem Reap is 42h 50m on average, while flying from Redmond to Siem Reap is 47h 35m on average. Siem Reap is the most popular airport in Region of Siem Reap.

Cheap Oregon to Region of Siem Reap flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Oregon to Region of Siem Reap

Fastest flight time

42h 50m

Direct flights

None
The fastest flight from Oregon to Region of Siem Reap takes 42h 50m
There are no direct flights from Oregon to Region of Siem Reap. There are no popular flight routes from Oregon to Region of Siem Reap.
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  • When did momondo last update prices for flights from Oregon to Siem Reap?

    Prices for flights from Oregon to Siem Reap refresh daily.

  • How old do you have to be to fly from Oregon to Siem Reap?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Oregon to Siem Reap.

  • What documentation or ID do you need to fly to Siem Reap?

    The necessary travel and health documents for your Siem Reap 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.

Why use momondo?

Why should I use momondo to find a flight deal from Oregon to Siem Reap?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Oregon to Siem Reap. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Oregon to Siem Reap with flexible booking policies on momondo?

All flight searches from Oregon to Siem Reap on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Oregon to Siem Reap?

momondo provides multiple filters to help you find the best flight to Siem Reap from Oregon. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Oregon to Siem Reap right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Siem Reap, momondo offers a useful price alert feature which will track prices for flights to Siem Reap from Oregon and alert you when they change.

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Tue 3/10
Tue 3/17
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Find better results for your trip to Siem Reap

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