In terms of precipitation, rainfall in Siem Reap ranges from 0.0 - 10.2 inches per month. September is typically the wettest month, when rainfall can reach 10.2 in. January is typically the driest time to visit Siem Reap when rainfall is around 0.0 in.

If weather is an important factor for your trip to Siem Reap, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 75.2 F).

What is the cheapest time of day to fly from PHL to SAI?

When flying from Philadelphia to Siem Reap, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Most accurate provider : When it comes to deals on Philadelphia-Siem Reap flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Siem Reap flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-Siem Reap flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Philadelphia-Siem Reap flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Siem Reap flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Philadelphia to Siem Reap that include hotel bookings?

Yes. In addition to deals on Philadelphia to Siem Reap flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Philadelphia to Siem Reap?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Siem Reap.

Can I find deals for business class flights from Philadelphia to Siem Reap?

Yes. Cheapflights offers flight deals from Philadelphia to Siem Reap by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$1,226+ Cheap Flights from Philadelphia to Siem Reap, Cambodia

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Cheap flight deals from Philadelphia to Siem Reap

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Best

Cheapest flights from Philadelphia to Siem Reap
Explore the most affordable flight options available from Philadelphia to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 18, 2026.

Wed 11/48:45 pm -

2 stops32h 55m

Sat 11/148:30 pm -

2 stops54h 20m

Deal found 9/13

$1,226

Thu 11/128:45 pm -

2 stops35h 45m

Sat 11/219:30 pm -

2 stops53h 20m

Deal found 9/17

$1,423

Wed 11/410:27 am -

3 stops38h 13m

Sat 11/149:55 am -

3 stops43h 13m

Deal found 9/15

$1,437

Find flight deals from Philadelphia to Siem Reap

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$1,226 (oojo)

Provider with most accurate pricing for Philadelphia-Siem Reap–Angkor Intl flight deals.

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Provider most trusted by Cheapflights users for Philadelphia-Siem Reap–Angkor Intl flights.

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From Philadelphia to Siem Reap–Angkor Intl

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Use the filters below to find and compare flights from Philadelphia to Siem Reap that are best for you.

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Route

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Price

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PhiladelphiaSiem Reap

PHL Philadelphia - SAI Siem Reap–Angkor Intl

PHLSAI

Philadelphia

Sat 2/13

8:45 pm-5:40 pm

2 stops32h 55m

Siem Reap–Angkor Intl

Sat 2/20

1:20 pm-2:50 pm

2 stops37h 30m

$1,325

PhiladelphiaSiem Reap

PHL Philadelphia - SAI Siem Reap–Angkor Intl

PHLSAI

Philadelphia

Wed 11/4

8:45 pm-5:40 pm

2 stops32h 55m

Siem Reap–Angkor Intl

Sat 11/14

8:30 pm-2:50 pm

2 stops54h 20m

$1,339

PhiladelphiaSiem Reap

PHL Philadelphia - SAI Siem Reap–Angkor Intl

PHLSAI

Philadelphia

Wed 11/4

7:00 am-9:15 am

3 stops38h 15m

Siem Reap–Angkor Intl

Sat 11/14

1:20 pm-5:08 pm

3 stops39h 48m

$1,611

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Sorted by cheapest first

Compare providers for flights from Philadelphia to Siem Reap

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Siem Reap in September.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
Ovago	Price Accuracy3 stars	Trust Score*3 stars
Cheapfaremart	Price Accuracy-	Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Philadelphia-Siem Reap flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Siem Reap flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-Siem Reap flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Philadelphia-Siem Reap flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Siem Reap flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Philadelphia to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from Philadelphia with our price prediction graph.

PHL-SAI

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Can I find deals for flights from Philadelphia to Siem Reap that include hotel bookings?
Yes. In addition to deals on Philadelphia to Siem Reap flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Philadelphia to Siem Reap?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Siem Reap.
Can I find deals for business class flights from Philadelphia to Siem Reap?
Yes. Cheapflights offers flight deals from Philadelphia to Siem Reap by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Browse thousands of different options on Cheapflights for your next trip

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$1,226+ Cheap flights from Philadelphia (PHL) to Siem Reap, Cambodia (SAI)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/4. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Philadelphia to Siem Reap with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Philadelphia to Siem Reap

Cheapest flights from Philadelphia to Siem ReapExplore the most affordable flight options available from Philadelphia to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 18, 2026.

Explore the most affordable flight options available from Philadelphia to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 18, 2026.

Best flights from Philadelphia to Siem ReapDiscover carefully curated flight deals from Philadelphia to Siem Reap that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 18, 2026.

Discover carefully curated flight deals from Philadelphia to Siem Reap that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 18, 2026.

Find flight deals from Philadelphia to Siem Reap

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Round-trip from

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Use the filters below to find and compare flights from Philadelphia to Siem Reap that are best for you.

Compare providers for flights from Philadelphia to Siem Reap

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Siem Reap in September.

Best time to book a flight from Philadelphia to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from Philadelphia with our price prediction graph.

Related info for your journey

Can I find deals for flights from Philadelphia to Siem Reap that include hotel bookings?

How can I find direct flights from Philadelphia to Siem Reap?

Can I find deals for business class flights from Philadelphia to Siem Reap?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Philadelphia to Siem Reap

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Siem Reap by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Philadelphia to Siem Reap by cabin class

Find flights from Philadelphia to Siem Reap, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Philadelphia and Siem Reap flights

Browse other Philadelphia and Siem Reap flight options. Last updated on September 18, 2026.

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Cheapest flights from Philadelphia to Siem Reap
Explore the most affordable flight options available from Philadelphia to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 18, 2026.

Best flights from Philadelphia to Siem Reap
Discover carefully curated flight deals from Philadelphia to Siem Reap that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 18, 2026.