Latest deals
Insights
FAQs
Price Alerts

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

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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 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 7, 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

See travel insights to Siem Reap from

How to get the cheapest flight ticket from Oregon to 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 does it take to fly to Siem Reap?

On average, it takes 42h 50m to fly from Oregon to Siem Reap if you fly out of Portland (the most popular airport in Oregon) and into Siem Reap (the most popular airport in Siem Reap). If you’re flying out of Redmond and into Siem Reap, then the flight time is around 47h 35m.

Cheap Oregon to Siem Reap flight deals and tips

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

Fastest flight time

42h 50m

Direct flights

None
The fastest flight from Oregon to Siem Reap takes 42h 50m
There are no direct flights from Oregon to Siem Reap. There are no popular flight routes from Oregon to Siem Reap.
Search flight deals

  • When did momondo last update prices for flights from Oregon to Siem Reap–Angkor Intl Airport?

    Prices for flights from Oregon to Siem Reap–Angkor Intl Airport refresh daily.

  • How old do you have to be to fly from Oregon to Siem Reap–Angkor Intl 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 Oregon to Siem Reap–Angkor Intl Airport.

  • What documentation or ID do you need to fly to Siem Reap–Angkor Intl Airport?

    The travel and health documents you'll need for your trip to Siem Reap–Angkor Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Siem Reap–Angkor Intl Airport. It is always advisable to seek 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?

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 Siem Reap from Oregon.

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

Yes. All flights to Siem Reap from Oregon on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once all potential Oregon to Siem Reap flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Oregon to Siem Reap flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Siem Reap trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 3/9
Mon 3/16
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Cambodia

Cabin classes currently available on flights to Siem Reap

List of cabin classes available on flights landing in Siem Reap. Availability may vary depending on flight origin and airline.
First Class to Siem Reap
Business Class to Siem Reap