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Cheap flights from Philadelphia to Siem Reap from $686

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to Siem Reap departing on 4/11. 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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Find the cheapest flights from Philadelphia to Siem Reap

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:58 pm - 9:40 am
PHL
-
SAI
51h 42m
2 stops
Multiple Airlines Logo
10:30 am - 6:02 am
SAI
-
PHL
54h 32m
2 stops
$1,911Multiple Airlines
Fri, Apr 24 - Fri, May 1
Qatar Airways Logo
8:25 pm - 6:45 pm
PHL
-
SAI
35h 20m
3 stops
Qatar Airways Logo
7:30 pm - 9:05 am
SAI
-
PHL
48h 35m
2 stops
$2,163Qatar Airways
Fri, Apr 24 - Fri, May 1
Multiple Airlines Logo
8:25 pm - 6:45 pm
PHL
-
SAI
35h 20m
3 stops
Multiple Airlines Logo
7:30 pm - 4:40 pm
SAI
-
PHL
56h 10m
3 stops
$3,211Multiple Airlines
Fri, Apr 24 - Fri, May 1

momondo Fare Finder

 
Customize your flight search to find flights from Philadelphia 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 14, 2026.
Use the filters below to find and compare flights from Philadelphia to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaSiem Reap

PHL - SAI

PHLSAI

Philadelphia

Fri 4/24

6:58 pm-9:40 am

2 stops51h 42m

Siem Reap–Angkor Intl

Fri 5/1

10:30 am-6:02 am

2 stops54h 32m

$1,911
Quickest round-trip

PhiladelphiaSiem Reap

PHL - SAI

PHLSAI

Philadelphia

Fri 4/24

8:25 pm-6:45 pm

3 stops35h 20m

Siem Reap–Angkor Intl

Fri 5/1

7:30 pm-9:05 am

2 stops48h 35m

$2,163

PhiladelphiaSiem Reap

PHL - SAI

PHLSAI

Philadelphia

Fri 4/24

8:25 pm-6:45 pm

3 stops35h 20m

Siem Reap–Angkor Intl

Fri 5/1

7:30 pm-4:40 pm

3 stops56h 10m

$3,211
Cheapest one-way

PhiladelphiaSiem Reap

PHL - SAI

PHLSAI

Philadelphia

Sat 4/11

9:56 pm-6:05 pm

3 stops57h 09m

$686

PhiladelphiaSiem Reap

PHL - SAI

PHLSAI

Philadelphia

Sat 4/11

8:30 pm-8:45 am

2 stops49h 15m

$751

PhiladelphiaSiem Reap

PHL - SAI

PHLSAI

Philadelphia

Sun 3/29

3:24 pm-11:10 am

3 stops56h 46m

$754

PhiladelphiaSiem Reap

PHL - SAI

PHLSAI

Philadelphia

Tue 3/31

6:47 pm-11:10 am

3 stops53h 23m

$770

PhiladelphiaSiem Reap

PHL - SAI

PHLSAI

Philadelphia

Wed 4/1

7:25 am-6:05 pm

3 stops47h 40m

$798

PhiladelphiaSiem Reap

PHL - SAI

PHLSAI

Philadelphia

Thu 4/2

7:25 am-6:05 pm

3 stops47h 40m

$799

PhiladelphiaSiem Reap

PHL - SAI

PHLSAI

Philadelphia

Fri 4/3

8:33 pm-6:45 pm

3 stops59h 12m

$834

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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When to book flights from Philadelphia to Siem Reap

Are you open to changing your travel dates? Check out the ideal times to fly from Philadelphia to Siem Reap according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Philadelphia to Siem Reap (PHL to SAI) flight deals and tips

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

Fastest flight time

51h 42m

Direct flights

None
The fastest flight from Philadelphia to Siem Reap takes 51h 42m
There are no direct flights from Philadelphia to Siem Reap. There are no popular flight routes from Philadelphia to Siem Reap.
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  • How far is Philadelphia to Siem Reap–Angkor Intl by plane?

    The straight-line distance from Philadelphia to Siem Reap–Angkor Intl is 8746.6 mi. 51h 42m is a normal flight duration for this route.

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport 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 required for your trip to Siem Reap–Angkor Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Siem Reap–Angkor Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • How do I get Price Alerts for flights from Philadelphia to Siem Reap?

    Search flight deals from Philadelphia to Siem Reap. While viewing offers you’ll have the option to create a Price Alert.

  • How can I save money on flights from Philadelphia to 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?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Philadelphia to Siem Reap. momondo saves you time and could save you money on your trip.

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

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

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

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

Yes momondo offers price alerts on flights to Siem Reap from Philadelphia. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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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