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Cheap flights from Oregon to Siem Reap from $574

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 4/22. 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
1 adult, Economy, 0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
2:50 pm - 3:10 pm
PDX
-
SAI
34h 20m
2 stops
Singapore Airlines Logo
10:30 am - 9:47 am
SAI
-
PDX
37h 17m
2 stops
$1,254Singapore Airlines
Wed, Apr 22 - Mon, Jun 1
Multiple Airlines Logo
9:30 pm - 1:15 pm
PDX
-
SAI
25h 45m
3 stops
Multiple Airlines Logo
7:30 pm - 1:50 pm
SAI
-
PDX
32h 20m
3 stops
$1,289Multiple Airlines
Wed, Apr 22 - Mon, Jun 1
Singapore Airlines Logo
7:20 am - 9:40 am
PDX
-
SAI
36h 20m
2 stops
Singapore Airlines Logo
10:30 am - 2:55 pm
SAI
-
PDX
42h 25m
2 stops
$1,370Singapore Airlines
Mon, Jul 20 - Sat, Jul 25
Multiple Airlines Logo
9:30 pm - 9:40 am
PDX
-
SAI
46h 10m
2 stops
Multiple Airlines Logo
10:30 am - 4:59 pm
SAI
-
PDX
44h 29m
2 stops
$1,504Multiple Airlines
Mon, Jul 20 - Sat, Jul 25
Multiple Airlines Logo
9:30 pm - 6:45 pm
PDX
-
SAI
31h 15m
3 stops
Multiple Airlines Logo
12:55 pm - 11:30 pm
SAI
-
PDX
24h 35m
3 stops
$1,550Multiple Airlines
Mon, Jul 20 - Sat, Jul 25
Multiple Airlines Logo
9:30 pm - 6:45 pm
PDX
-
SAI
31h 15m
3 stops
Multiple Airlines Logo
12:55 pm - 11:30 pm
SAI
-
PDX
24h 35m
3 stops
$1,600Multiple Airlines
Mon, Jul 20 - Sat, Jul 25
Multiple Airlines Logo
1:52 pm - 9:40 am
PDX
-
SAI
53h 48m
2 stops
Multiple Airlines Logo
10:30 am - 1:10 pm
SAI
-
PDX
64h 40m
3 stops
$1,604Multiple Airlines
Wed, Apr 22 - Mon, Jun 1
Multiple Airlines Logo
10:10 am - 9:00 am
PDX
-
SAI
32h 50m
2 stops
Multiple Airlines Logo
7:30 pm - 9:31 am
SAI
-
PDX
28h 01m
3 stops
$1,811Multiple Airlines
Mon, Jul 20 - Sat, Jul 25

Singapore Airlines flights from Oregon to Siem Reap

Our best Singapore Airlines deals on Oregon to Siem Reap flight tickets
Singapore Airlines
Apr 22
PDX2:50 pmPortland
34h 20m
2 stops
SAI3:10 pmSiem Reap–Angkor Intl
Jun 1
SAI10:30 amSiem Reap–Angkor Intl
37h 17m
2 stops
PDX9:47 amPortland
$1,254
Singapore Airlines
Jul 20
PDX7:20 amPortland
36h 20m
2 stops
SAI9:40 amSiem Reap–Angkor Intl
Jul 25
SAI10:30 amSiem Reap–Angkor Intl
42h 25m
2 stops
PDX2:55 pmPortland
$1,370

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 March 26, 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

Cheapest round-trip

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Wed 4/22

2:50 pm-3:10 pm

2 stops34h 20m

Siem Reap–Angkor Intl

Mon 6/1

10:30 am-9:47 am

2 stops37h 17m

$1,254

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Wed 4/22

9:30 pm-1:15 pm

3 stops25h 45m

Siem Reap–Angkor Intl

Mon 6/1

7:30 pm-1:50 pm

3 stops32h 20m

$1,289

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Mon 7/20

7:20 am-9:40 am

2 stops36h 20m

Siem Reap–Angkor Intl

Sat 7/25

10:30 am-2:55 pm

2 stops42h 25m

$1,370

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Mon 7/20

9:30 pm-9:40 am

2 stops46h 10m

Siem Reap–Angkor Intl

Sat 7/25

10:30 am-4:59 pm

2 stops44h 29m

$1,504
Quickest round-trip

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Mon 7/20

9:30 pm-6:45 pm

3 stops31h 15m

Siem Reap–Angkor Intl

Sat 7/25

12:55 pm-11:30 pm

3 stops24h 35m

$1,550

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Mon 7/20

9:30 pm-6:45 pm

3 stops31h 15m

Siem Reap–Angkor Intl

Sat 7/25

12:55 pm-11:30 pm

3 stops24h 35m

$1,600

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Wed 4/22

1:52 pm-9:40 am

2 stops53h 48m

Siem Reap–Angkor Intl

Mon 6/1

10:30 am-1:10 pm

3 stops64h 40m

$1,604

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Mon 7/20

10:10 am-9:00 am

2 stops32h 50m

Siem Reap–Angkor Intl

Sat 7/25

7:30 pm-9:31 am

3 stops28h 01m

$1,811
Cheapest one-way

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Wed 4/22

2:50 pm-6:20 pm

2 stops37h 30m

$574
Quickest one-way

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Wed 4/22

5:51 pm-6:05 pm

3 stops34h 14m

$632

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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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

What is the cheapest airline that flies from Oregon to Siem Reap–Angkor Intl?

Vietnam Airlines and ANA are the most popular carriers operating from Oregon to Siem Reap–Angkor Intl

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

34h 20m

Direct flights

None
The fastest flight from Oregon to Siem Reap takes 34h 20m
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.

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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