Latest deals
FAQs
Price Alerts

Cheap flights from Portland to Siem Reap from $851

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 Siem Reap departing on 6/1. 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

Find the cheapest flights from Portland to Siem Reap

Cheap round-trip flights

Enter your travel dates to find the best prices.
Emirates Logo
5:46 pm - 9:30 pm
PDX
-
SAI
61h 44m
3 stops
Emirates Logo
11:50 pm - 9:28 pm
SAI
-
PDX
35h 38m
3 stops
$1,668Emirates
Sat, May 23 - Sat, May 30
Multiple Airlines Logo
10:45 am - 9:30 pm
PDX
-
SAI
44h 45m
3 stops
Multiple Airlines Logo
11:50 pm - 11:30 pm
SAI
-
PDX
37h 40m
3 stops
$1,679Multiple Airlines
Tue, Jul 14 - Tue, Jul 28
Multiple Airlines Logo
10:45 am - 9:30 pm
PDX
-
SAI
44h 45m
3 stops
Multiple Airlines Logo
11:50 pm - 10:25 pm
SAI
-
PDX
36h 35m
3 stops
$1,684Multiple Airlines
Tue, Jul 14 - Tue, Jul 28
Multiple Airlines Logo
7:00 am - 9:30 pm
PDX
-
SAI
48h 30m
3 stops
Multiple Airlines Logo
11:50 pm - 6:56 pm
SAI
-
PDX
33h 06m
3 stops
$1,687Multiple Airlines
Tue, Jul 14 - Tue, Jul 28
Emirates Logo
7:00 am - 9:30 pm
PDX
-
SAI
48h 30m
3 stops
Emirates Logo
11:50 pm - 6:56 pm
SAI
-
PDX
33h 06m
3 stops
$1,692Emirates
Tue, Jul 14 - Tue, Jul 28
Multiple Airlines Logo
5:30 pm - 1:15 pm
PDX
-
SAI
29h 45m
3 stops
Multiple Airlines Logo
9:40 am - 10:25 pm
SAI
-
PDX
26h 45m
3 stops
$1,745Multiple Airlines
Tue, Jul 7 - Tue, Jul 21
Multiple Airlines Logo
5:30 pm - 1:15 pm
PDX
-
SAI
29h 45m
3 stops
Multiple Airlines Logo
12:55 pm - 11:35 pm
SAI
-
PDX
24h 40m
3 stops
$1,820Multiple Airlines
Tue, Jul 7 - Tue, Jul 21
Singapore Airlines Logo
5:00 am - 9:40 am
PDX
-
SAI
38h 40m
2 stops
Singapore Airlines Logo
10:30 am - 9:21 am
SAI
-
PDX
36h 51m
2 stops
$1,868Singapore Airlines
Tue, Jul 14 - Tue, Jul 28
Singapore Airlines Logo
6:19 am - 9:40 am
PDX
-
SAI
37h 21m
2 stops
Singapore Airlines Logo
10:30 am - 9:21 am
SAI
-
PDX
36h 51m
2 stops
$1,887Singapore Airlines
Tue, Jul 14 - Tue, Jul 28
Singapore Airlines Logo
5:00 am - 9:40 am
PDX
-
SAI
38h 40m
2 stops
Singapore Airlines Logo
10:30 am - 9:21 am
SAI
-
PDX
36h 51m
2 stops
$1,991Singapore Airlines
Tue, Jul 7 - Tue, Jul 21

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

Singapore Airlines flights from Portland to Region of Siem Reap

Our best Singapore Airlines deals on Portland to Region of Siem Reap flight tickets
Singapore Airlines
Jul 14
PDX5:00 amPortland
38h 40m
2 stops
SAI9:40 amSiem Reap–Angkor Intl
Jul 28
SAI10:30 amSiem Reap–Angkor Intl
36h 51m
2 stops
PDX9:21 amPortland
$1,868
Singapore Airlines
Jul 14
PDX6:19 amPortland
37h 21m
2 stops
SAI9:40 amSiem Reap–Angkor Intl
Jul 28
SAI10:30 amSiem Reap–Angkor Intl
36h 51m
2 stops
PDX9:21 amPortland
$1,887
Singapore Airlines
Jul 7
PDX5:00 amPortland
38h 40m
2 stops
SAI9:40 amSiem Reap–Angkor Intl
Jul 21
SAI10:30 amSiem Reap–Angkor Intl
36h 51m
2 stops
PDX9:21 amPortland
$1,991

Emirates flights from Portland to Region of Siem Reap

Our best Emirates deals on Portland to Region of Siem Reap flight tickets
Emirates
May 23
PDX5:46 pmPortland
61h 44m
3 stops
SAI9:30 pmSiem Reap–Angkor Intl
May 30
SAI11:50 pmSiem Reap–Angkor Intl
35h 38m
3 stops
PDX9:28 pmPortland
$1,668
Emirates
Jul 14
PDX7:00 amPortland
48h 30m
3 stops
SAI9:30 pmSiem Reap–Angkor Intl
Jul 28
SAI11:50 pmSiem Reap–Angkor Intl
33h 06m
3 stops
PDX6:56 pmPortland
$1,692

momondo Fare Finder

 
Customize your flight search to find flights from Portland 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 May 1, 2026.
Use the filters below to find and compare flights from Portland 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

Sat 5/23

5:46 pm-9:30 pm

3 stops61h 44m

Siem Reap–Angkor Intl

Sat 5/30

11:50 pm-9:28 pm

3 stops35h 38m

$1,668

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Tue 7/14

10:45 am-9:30 pm

3 stops44h 45m

Siem Reap–Angkor Intl

Tue 7/28

11:50 pm-11:30 pm

3 stops37h 40m

$1,679

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Tue 7/14

10:45 am-9:30 pm

3 stops44h 45m

Siem Reap–Angkor Intl

Tue 7/28

11:50 pm-10:25 pm

3 stops36h 35m

$1,684

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Tue 7/14

7:00 am-9:30 pm

3 stops48h 30m

Siem Reap–Angkor Intl

Tue 7/28

11:50 pm-6:56 pm

3 stops33h 06m

$1,687

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Tue 7/14

7:00 am-9:30 pm

3 stops48h 30m

Siem Reap–Angkor Intl

Tue 7/28

11:50 pm-6:56 pm

3 stops33h 06m

$1,692

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Tue 7/7

5:30 pm-1:15 pm

3 stops29h 45m

Siem Reap–Angkor Intl

Tue 7/21

9:40 am-10:25 pm

3 stops26h 45m

$1,745
Quickest round-trip

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Tue 7/7

5:30 pm-1:15 pm

3 stops29h 45m

Siem Reap–Angkor Intl

Tue 7/21

12:55 pm-11:35 pm

3 stops24h 40m

$1,820

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Tue 7/14

5:00 am-9:40 am

2 stops38h 40m

Siem Reap–Angkor Intl

Tue 7/28

10:30 am-9:21 am

2 stops36h 51m

$1,868

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Tue 7/14

6:19 am-9:40 am

2 stops37h 21m

Siem Reap–Angkor Intl

Tue 7/28

10:30 am-9:21 am

2 stops36h 51m

$1,887

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Tue 7/7

5:00 am-9:40 am

2 stops38h 40m

Siem Reap–Angkor Intl

Tue 7/21

10:30 am-9:21 am

2 stops36h 51m

$1,991

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Cheap Portland to Region of Siem Reap flight deals and tips

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

Fastest flight time

29h 45m

Direct flights

None
The fastest flight from Portland to Region of Siem Reap takes 29h 45m
There are no direct flights from Portland to Region of Siem Reap. There are no popular flight routes from Portland to Region of Siem Reap.
Search flight deals

Frequently asked questions about flying from Portland to Siem Reap

  • When did momondo last update prices for flights from Portland Airport to Siem Reap?

    Prices for flights from Portland Airport to Siem Reap were last updated today.

  • How old do you have to be to fly from Portland Airport 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 Portland Airport to Siem Reap.

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

    The travel and health documents you'll need for your trip to Siem Reap 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. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from Portland to Siem Reap

  • How do I get Price Alerts for flights from Portland to Region of Siem Reap?

    Price Alerts will notify you by email when the price for flights to Region of Siem Reap from Portland decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Portland to Region of Siem Reap 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?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Why use momondo?

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

Finding the right flight to Siem Reap from Portland is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Siem Reap quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Siem Reap from Portland with this policy.

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

Once all potential Portland 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 Portland to Siem Reap right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Portland 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 Region of 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
Sun 5/31
Sun 6/7
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Siem Reap

Popular cities in Siem Reap

Popular flights according to clicks in the last 7 days on momondo
Flights to Phnom Penhfrom $1,020
Flights to Siem Reapfrom $765
Flights to Krong Preah Sihanoukfrom $1,236