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Cheap flights from Philadelphia to Sydney from $929

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
27 Aug — 3 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Philadelphia to Sydney

Enter your travel dates to find the best prices.

Cheapest flights from Philadelphia to Sydney
Explore the most affordable flight options available from Philadelphia to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 July 2026.

Wed 28/1017:30
PHL
-
SYD
1 stop24h 30m
Qantas Airways
Sat 7/1119:15
SYD
-
PHL
2 stops35h 40m
Qantas Airways
Deal found 25/7$1,576
Sat 24/1015:57
PHL
-
SYD
1 stop26h 03m
Qantas Airways
Sat 7/1112:45
SYD
-
PHL
2 stops42h 10m
Qantas Airways
Deal found 26/7$1,646
Sun 8/1115:20
PHL
-
SYD
2 stops26h 15m
Air Canada
Wed 18/1111:20
SYD
-
PHL
2 stops43h 24m
Air Canada
Deal found 26/7$1,669
Wed 16/910:05
PHL
-
SYD
2 stops31h 15m
Air Canada
Tue 29/909:20
SYD
-
PHL
2 stops43h 27m
Air Canada
Deal found 24/7$1,671
Mon 5/1007:00
PHL
-
SYD
2 stops34h 20m
Air Canada
Tue 20/1010:20
SYD
-
PHL
2 stops26h 12m
Air Canada
Deal found 24/7$1,676
Mon 17/810:05
PHL
-
SYD
2 stops55h 15m
Air Canada
Tue 8/909:20
SYD
-
PHL
2 stops43h 27m
Air Canada
Deal found 26/7$1,684
Wed 16/917:30
PHL
-
SYD
1 stop23h 35m
Qantas Airways
Tue 29/909:10
SYD
-
PHL
1 stop23h 32m
Qantas Airways
Deal found 24/7$1,696
Tue 18/810:34
PHL
-
SYD
3 stops30h 46m
Multiple Airlines
Mon 7/909:20
SYD
-
PHL
3 stops43h 27m
Multiple Airlines
Deal found 26/7$1,709

Find flight deals from Philadelphia to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 28 July 2026.

Round-trip from

$1,576

One-way from

$929

Popular in

December

Cheapest in

February

Average price

$2,224
Qantas Airways
  • Qantas Airways
  • 28/10-7/11
  • 3 total stops
  • 60h 10m total
  • Philadelphia to Sydney
Search Deals
5/9
  • 5/9
  • 3 total stops
  • 57h 15m total
  • Philadelphia to Sydney
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($308 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($62 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Philadelphia to Sydney 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, Cheapflights users made 647,157 searches. Data last updated 28 July 2026.
Use the filters below to find and compare flights from Philadelphia to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 7/9

07:05-06:50

2 stops33h 45m

Sydney Kingsford Smith

Mon 14/9

09:15-20:25

2 stops25h 10m

$1,787

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 24/8

21:30-22:20

2 stops34h 50m

Sydney Kingsford Smith

Mon 31/8

20:45-14:30

1 stop31h 45m

$2,227

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Thu 10/12

06:10-09:05

2 stops34h 55m

Sydney Kingsford Smith

Fri 18/12

11:50-23:21

2 stops27h 31m

$2,317

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Fri 11/12

08:15-09:20

2 stops33h 05m

Sydney Kingsford Smith

Tue 29/12

11:20-07:29

2 stops36h 09m

$2,331

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 28/12

09:45-09:05

2 stops31h 20m

Sydney Kingsford Smith

Fri 8/1

09:15-17:22

2 stops24h 07m

$2,332

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Thu 3/12

12:40-10:35

2 stops29h 55m

Sydney Kingsford Smith

Sun 13/12

11:50-10:27

3 stops38h 37m

$2,630
Fastest return journey

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Thu 24/12

18:13-09:20

1 stop23h 07m

Sydney Kingsford Smith

Sun 10/1

09:15-22:30

1 stop29h 15m

$2,833

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 25/8

09:27-10:40

2 stops35h 13m

Sydney Kingsford Smith

Tue 1/9

09:55-12:23

3 stops40h 28m

$2,981
Cheapest one-way

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Wed 18/11

12:43-22:20

3 stops41h 37m

$1,163

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Fri 9/10

05:15-08:05

2 stops35h 50m

$1,228

Flights are sorted by cheapest return flights first.

Deals found on 24/7

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

Best time to book a flight from Philadelphia to Sydney

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

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to Sydney

How far ahead should I book a flight from Philadelphia to Sydney?

Booking 58 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to Sydney. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Philadelphia to Sydney?

Currently, February is the cheapest month in which you can book a flight from Philadelphia to Sydney (average of $1,548). Flying from Philadelphia to Sydney in December is currently the most expensive (average of $2,533). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost for a return flight from Philadelphia to Sydney?

Airfare is below average for this route at the moment.

Philadelphia to Sydney flights typically cost between $2,124 and $2,212 in October.
The cheapest return price found within the last 5 days was $1,576 on Qantas Airways (28 Oct–7 Nov).

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Philadelphia to Sydney?

    There are many flights that can get you from Philadelphia to Sydney in 27h 25m. Fly via Delta, United Airlines, or Qatar Airways to get the fastest option. The distance between Philadelphia and Sydney is about 15871 km. Both multi-stop and direct flights can be found to your destination and back.

  • Can I find deals for flights from Philadelphia to Sydney that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Sydney flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Sydney?

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

  • Can I find deals for business class flights from Philadelphia to Sydney?

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

  • What is the cheapest month to book a flight from Philadelphia to Sydney?

    Currently, February is the cheapest month in which you can book a flight from Philadelphia to Sydney (average of $1,548). Flying from Philadelphia to Sydney in December is currently the most expensive (average of $2,533). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Penrith
Katoomba
Manly
Lithgow
Cronulla
Randwick
Terrigal
Leura
Bondi Beach
Coogee

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How does Cheapflights help users find flights from Philadelphia to Sydney?

Deals for Philadelphia to Sydney flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Philadelphia to Sydney?

Cheapflights simply makes it quick and affordable to book flights from Philadelphia to Sydney by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Philadelphia to Sydney with no change fees?

Yes, we can. To see specific flights from Philadelphia to Sydney with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Philadelphia to Sydney become cheaper?

Of course! You can now track prices for flights from Philadelphia to Sydney and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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