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Cheap flights from Portland to Siem Reap from $1,736

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Siem Reap departing on 7/14. 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

Find the cheapest flights from Portland to Siem Reap

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
5:36 pm - 1:15 pm
PDX
-
SAI
29h 39m
3 stops
Multiple Airlines Logo
12:55 pm - 11:35 pm
SAI
-
PDX
24h 40m
3 stops
$1,736Multiple Airlines
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 14 - Tue, Jul 28
Multiple Airlines Logo
5:36 pm - 1:15 pm
PDX
-
SAI
29h 39m
3 stops
Multiple Airlines Logo
12:55 pm - 11:35 pm
SAI
-
PDX
24h 40m
3 stops
$1,761Multiple Airlines
Tue, Jul 14 - Tue, Jul 28
Multiple Airlines Logo
5:36 pm - 1:15 pm
PDX
-
SAI
29h 39m
3 stops
Multiple Airlines Logo
12:55 pm - 11:35 pm
SAI
-
PDX
24h 40m
3 stops
$1,772Multiple Airlines
Tue, Jul 14 - Tue, Jul 28
Multiple Airlines Logo
5:37 pm - 5:50 pm
PDX
-
SAI
34h 13m
3 stops
Multiple Airlines Logo
7:10 pm - 11:52 pm
SAI
-
PDX
42h 42m
2 stops
$1,801Multiple Airlines
Fri, Jul 10 - Fri, Jul 17
Multiple Airlines Logo
5:36 pm - 6:40 pm
PDX
-
SAI
35h 04m
3 stops
Multiple Airlines Logo
12:55 pm - 11:30 pm
SAI
-
PDX
24h 35m
3 stops
$1,856Multiple Airlines
Fri, Jul 10 - Fri, Jul 17
Multiple Airlines Logo
1:14 pm - 3:10 pm
PDX
-
SAI
35h 56m
2 stops
Multiple Airlines Logo
4:00 pm - 8:54 pm
SAI
-
PDX
42h 54m
2 stops
$1,963Multiple Airlines
Fri, Jul 10 - Fri, Jul 17
Multiple Airlines Logo
9:45 pm - 8:45 am
PDX
-
SAI
45h 00m
2 stops
Multiple Airlines Logo
10:35 pm - 10:48 pm
SAI
-
PDX
38h 13m
2 stops
$2,022Multiple Airlines
Tue, Jul 14 - Tue, Jul 28
Multiple Airlines Logo
9:45 pm - 8:45 am
PDX
-
SAI
45h 00m
2 stops
Multiple Airlines Logo
10:35 pm - 10:48 pm
SAI
-
PDX
38h 13m
2 stops
$2,066Multiple Airlines
Tue, Jul 14 - Tue, Jul 28
Multiple Airlines Logo
9:45 pm - 8:45 am
PDX
-
SAI
45h 00m
2 stops
Multiple Airlines Logo
10:35 pm - 11:52 pm
SAI
-
PDX
39h 17m
2 stops
$2,122Multiple Airlines
Tue, Jul 14 - Tue, Jul 28

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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
PDX7:00 amPortland
36h 40m
3 stops
SAI9:40 amSiem Reap–Angkor Intl
Jul 28
SAI10:30 amSiem Reap–Angkor Intl
36h 51m
2 stops
PDX9:21 amPortland
$2,493
Singapore Airlines
Jul 14
PDX7:00 amPortland
36h 40m
3 stops
SAI9:40 amSiem Reap–Angkor Intl
Jul 28
SAI10:30 amSiem Reap–Angkor Intl
36h 51m
2 stops
PDX9:21 amPortland
$2,643

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 June 15, 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
Quickest round-trip

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Tue 7/14

5:36 pm-1:15 pm

3 stops29h 39m

Siem Reap–Angkor Intl

Tue 7/28

12:55 pm-11:35 pm

3 stops24h 40m

$1,736

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Tue 7/14

5:30 pm-1:15 pm

3 stops29h 45m

Siem Reap–Angkor Intl

Tue 7/28

9:40 am-10:25 pm

3 stops26h 45m

$1,745

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Tue 7/14

5:36 pm-1:15 pm

3 stops29h 39m

Siem Reap–Angkor Intl

Tue 7/28

12:55 pm-11:35 pm

3 stops24h 40m

$1,761

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Tue 7/14

5:36 pm-1:15 pm

3 stops29h 39m

Siem Reap–Angkor Intl

Tue 7/28

12:55 pm-11:35 pm

3 stops24h 40m

$1,772

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Fri 7/10

5:37 pm-5:50 pm

3 stops34h 13m

Siem Reap–Angkor Intl

Fri 7/17

7:10 pm-11:52 pm

2 stops42h 42m

$1,801

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Fri 7/10

5:36 pm-6:40 pm

3 stops35h 04m

Siem Reap–Angkor Intl

Fri 7/17

12:55 pm-11:30 pm

3 stops24h 35m

$1,856

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Fri 7/10

1:14 pm-3:10 pm

2 stops35h 56m

Siem Reap–Angkor Intl

Fri 7/17

4:00 pm-8:54 pm

2 stops42h 54m

$1,963

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Tue 7/14

9:45 pm-8:45 am

2 stops45h 00m

Siem Reap–Angkor Intl

Tue 7/28

10:35 pm-10:48 pm

2 stops38h 13m

$2,022

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Tue 7/14

9:45 pm-8:45 am

2 stops45h 00m

Siem Reap–Angkor Intl

Tue 7/28

10:35 pm-10:48 pm

2 stops38h 13m

$2,066

PortlandSiem Reap

PDX - SAI

PDXSAI

Portland

Tue 7/14

9:45 pm-8:45 am

2 stops45h 00m

Siem Reap–Angkor Intl

Tue 7/28

10:35 pm-11:52 pm

2 stops39h 17m

$2,122

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Siem Reap from

How to get the cheapest flight ticket from Portland 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

What is the cheapest airline that flies from Portland to Siem Reap?

United Airlines is the most popular carrier operating from Portland to Siem Reap

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 39m

Direct flights

None
The fastest flight from Portland to Region of Siem Reap takes 29h 39m
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.
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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.

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.

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