$251 Cheap Flights from Sydney (SYD) to Phnom Penh (PNH)

View $251 flight on Fri, Oct 31, 2025Opens in a new window

Popular airlines from Sydney Airport (SYD) to Phnom Penh Intl. Airport (PNH)

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Cheap Flights from Sydney to Phnom Penh (SYD-PNH)

Prices were available within the past 7 days and start at $251 for one-way flights and $519 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

China Southern Airlines
Tue, Oct 14 - Thu, Oct 23
SYD
Sydney
PNH
Phnom Penh
$519 Roundtrip, found 6 days ago
$519
Roundtrip
found 6 days ago
Select China Southern Airlines flight, departing Tue, Oct 14 from Sydney to Phnom Penh, returning Thu, Oct 23, priced at $519 found 6 days ago
China Southern Airlines
Wed, Aug 27 - Wed, Sep 3
SYD
Sydney
PNH
Phnom Penh
$522 Roundtrip, found 1 day ago
$522
Roundtrip
found 1 day ago
Select China Southern Airlines flight, departing Wed, Aug 27 from Sydney to Phnom Penh, returning Wed, Sep 3, priced at $522 found 1 day ago
China Southern Airlines
Sat, Aug 23 - Sat, Aug 30
SYD
Sydney
PNH
Phnom Penh
$524 Roundtrip, found 5 days ago
$524
Roundtrip
found 5 days ago
Select China Southern Airlines flight, departing Sat, Aug 23 from Sydney to Phnom Penh, returning Sat, Aug 30, priced at $524 found 5 days ago
Philippine Airlines
Thu, Oct 9 - Sun, Oct 26
SYD
Sydney
PNH
Phnom Penh
$553 Roundtrip, found 3 days ago
$553
Roundtrip
found 3 days ago
Select Philippine Airlines flight, departing Thu, Oct 9 from Sydney to Phnom Penh, returning Sun, Oct 26, priced at $553 found 3 days ago
China Eastern Airlines
Wed, Aug 27 - Wed, Sep 3
SYD
Sydney
PNH
Phnom Penh
$584 Roundtrip, found 1 day ago
$584
Roundtrip
found 1 day ago
Select China Eastern Airlines flight, departing Wed, Aug 27 from Sydney to Phnom Penh, returning Wed, Sep 3, priced at $584 found 1 day ago
China Eastern Airlines
Fri, Aug 15 - Mon, Sep 15
SYD
Sydney
PNH
Phnom Penh
$585 Roundtrip, found 5 days ago
$585
Roundtrip
found 5 days ago
Select China Eastern Airlines flight, departing Fri, Aug 15 from Sydney to Phnom Penh, returning Mon, Sep 15, priced at $585 found 5 days ago
Vietnam Airlines
Tue, Oct 14 - Thu, Oct 23
SYD
Sydney
PNH
Phnom Penh
$591 Roundtrip, found 6 days ago
$591
Roundtrip
found 6 days ago
Select Vietnam Airlines flight, departing Tue, Oct 14 from Sydney to Phnom Penh, returning Thu, Oct 23, priced at $591 found 6 days ago
Vietnam Airlines
Wed, Aug 27 - Wed, Sep 3
SYD
Sydney
PNH
Phnom Penh
$594 Roundtrip, found 1 day ago
$594
Roundtrip
found 1 day ago
Select Vietnam Airlines flight, departing Wed, Aug 27 from Sydney to Phnom Penh, returning Wed, Sep 3, priced at $594 found 1 day ago
Jetstar
Sun, Aug 24 - Mon, Sep 8
SYD
Sydney
PNH
Phnom Penh
$596 Roundtrip, found 6 days ago
$596
Roundtrip
found 6 days ago
Select Jetstar flight, departing Sun, Aug 24 from Sydney to Phnom Penh, returning Mon, Sep 8, priced at $596 found 6 days ago
Vietnam Airlines
Wed, Oct 8 - Sat, Oct 25
SYD
Sydney
PNH
Phnom Penh
$597 Roundtrip, found 3 days ago
$597
Roundtrip
found 3 days ago
Select Vietnam Airlines flight, departing Wed, Oct 8 from Sydney to Phnom Penh, returning Sat, Oct 25, priced at $597 found 3 days ago
Flights from Sydney (SYD) to Phnom Penh (PNH)
Origin airport
Kingsford Smith Intl.
Destination airport
Phnom Penh Intl.
Airlines serving
Air China, Bangkok Airways, Cathay Pacific, China Airlines, China Eastern Airlines, China Southern Airlines, Emirates, Korean Air, Malaysia Airlines, Philippine Airlines, Qantas Airways, Singapore Airlines, Thai Airways International, Vietnam Airlines
Roundtrip price
$519
Distance
4372 mi

Sydney to Phnom Penh Flights

The cheapest times to fly from Sydney to Phnom Penh

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Sydney to Phnom Penh are during the month of October. You can find some of the cheapest flights from Sydney to Phnom Penh with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sydney to Phnom Penh

Sunday is one of the best days to book for cheap flights from Sydney to Phnom Penh: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Sydney to Phnom Penh

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Sydney to Phnom Penh in 2025. You can also book with separate airlines for your outbound and return journeys, from $251 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Sydney to Phnom Penh flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Sydney to Phnom Penh airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Kingsford Smith Intl. Airport (SYD) to Phnom Penh Intl. Airport (PNH) cost?
Discover the latest flight deals from SYD to PNH by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SYD to PNH?
The cheapest flights from SYD to PNH are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SYD to PNH?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SYD to PNH. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Kingsford Smith Intl. Airport (SYD) to Phnom Penh Intl. Airport (PNH)?
You'll need to hop on a flight with a layover when traveling from Kingsford Smith Intl. Airport (SYD) to Phnom Penh Intl. Airport (PNH). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from SYD to PNH?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Kingsford Smith Intl. Airport (SYD) to Phnom Penh Intl. Airport (PNH)?
To avoid potential delays on the Kingsford Smith Intl. Airport (SYD) to Phnom Penh Intl. Airport (PNH) route, aim to travel before 3 PM. Departures after this time have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Kingsford Smith Intl. Airport (SYD) to Phnom Penh Intl. Airport (PNH) last-minute?
Booking your flight from SYD to PNH right before your trip is usually more expensive. However, if there's some wiggle room with your itinerary, you could score a cheap last-minute fare.
Is it cheaper to book a SYD to PNH flight and hotel package?
You'll typically save money by securing a SYD to PNH flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. After choosing your preferred flights and accommodations, you can add extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Kingsford Smith Intl. Airport (SYD) to Phnom Penh Intl. Airport (PNH)?
It's generally possible to cancel or reschedule your SYD to PNH flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.