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Cheap flights from Philadelphia to Australia 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 16/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
23 Aug — 30 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Philadelphia to Australia

Enter your travel dates to find the best prices.

Cheapest flights from Philadelphia to Australia
Explore the most affordable flight options available from Philadelphia to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 July 2026.

Wed 25/1110:50
PHL
-
SYD
1 stop27h 35m
Qantas Airways
Sat 12/1207:05
SYD
-
PHL
2 stops29h 00m
Qantas Airways
Deal found 22/7$1,607
Mon 7/910:05
PHL
-
BNE
2 stops31h 00m
Air Canada
Tue 22/910:15
BNE
-
PHL
2 stops37h 28m
Air Canada
Deal found 23/7$1,628
Mon 21/910:05
PHL
-
BNE
2 stops31h 00m
Air Canada
Wed 30/910:00
BNE
-
PHL
2 stops25h 32m
Air Canada
Deal found 21/7$1,637
Sat 24/1015:57
PHL
-
SYD
1 stop26h 03m
Qantas Airways
Sat 7/1112:45
SYD
-
PHL
2 stops42h 10m
Qantas Airways
Deal found 21/7$1,645
Sun 1/1115:55
PHL
-
SYD
1 stop25h 05m
Qantas Airways
Sat 7/1112:45
SYD
-
PHL
2 stops42h 10m
Qantas Airways
Deal found 23/7$1,650
Mon 27/710:05
PHL
-
SYD
2 stops31h 15m
Air Canada
Sun 2/809:20
SYD
-
PHL
2 stops43h 29m
Air Canada
Deal found 22/7$1,671
Wed 16/910:05
PHL
-
SYD
2 stops31h 15m
Air Canada
Tue 29/909:20
SYD
-
PHL
2 stops43h 27m
Air Canada
Deal found 23/7$1,673
Mon 21/915:42
PHL
-
BNE
1 stop23h 18m
Qantas Airways
Wed 30/920:35
BNE
-
PHL
1 stop24h 30m
Qantas Airways
Deal found 20/7$1,684
Sun 26/716:20
PHL
-
SYD
2 stops49h 00m
Air Canada
Sun 2/809:20
SYD
-
PHL
2 stops27h 26m
Air Canada
Deal found 21/7$1,685
Mon 14/910:50
PHL
-
BNE
2 stops30h 15m
Multiple Airlines
Sat 17/1019:40
BNE
-
PHL
3 stops41h 06m
Multiple Airlines
Deal found 22/7$1,694
Sun 8/1115:20
PHL
-
SYD
3 stops50h 15m
Air Canada
Wed 18/1111:20
SYD
-
PHL
3 stops43h 24m
Air Canada
Deal found 22/7$1,695
Mon 2/1120:05
PHL
-
MEL
1 stop40h 55m
Qantas Airways
Wed 11/1122:45
MEL
-
PHL
1 stop35h 04m
Qantas Airways
Deal found 22/7$1,701

Find flight deals from Philadelphia to Australia

Keep the following information in mind while searching for Philadelphia to Australia flight deals. Data was last updated 24 July 2026.

Round-trip from

$1,607

One-way from

$929

Popular in

December

Cheapest in

February

Average price

$2,295
Qantas Airways
  • Qantas Airways
  • 25/11-12/12
  • 3 total stops
  • 56h 35m total
  • Philadelphia to Australia
Search Deals
16/11
  • 16/11
  • 3 total stops
  • 58h 47m total
  • Philadelphia to Australia
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($442 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($105 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 Australia 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 24 July 2026.
Use the filters below to find and compare flights from Philadelphia to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Mon 7/9

09:27-06:30

1 stop31h 03m

Brisbane

Tue 22/9

10:30-19:15

1 stop22h 45m

$1,738

PhiladelphiaMelbourne

PHL - MEL

PHLMEL

Philadelphia

Mon 2/11

09:55-10:30

2 stops32h 35m

Melbourne

Wed 11/11

12:45-20:26

1 stop23h 41m

$1,738

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Wed 12/8

10:34-06:30

2 stops29h 56m

Brisbane

Wed 26/8

10:30-20:55

1 stop24h 25m

$1,744
Fastest return journey

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 8/11

16:05-06:25

1 stop22h 20m

Sydney Kingsford Smith

Wed 18/11

11:05-20:32

2 stops25h 27m

$1,766

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Mon 14/9

15:48-06:30

2 stops24h 42m

Brisbane

Sat 17/10

17:55-21:15

2 stops41h 20m

$1,787

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 6/9

06:16-06:55

3 stops34h 39m

Sydney Kingsford Smith

Sun 13/9

09:30-20:55

2 stops25h 25m

$1,788

PhiladelphiaMelbourne

PHL - MEL

PHLMEL

Philadelphia

Fri 11/9

09:27-08:15

1 stop32h 48m

Melbourne

Wed 30/9

10:55-07:49

1 stop34h 54m

$1,826

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Fri 4/9

18:56-06:30

3 stops69h 34m

Brisbane

Fri 11/9

10:30-21:27

2 stops24h 57m

$1,850

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Fri 21/8

15:37-07:30

1 stop25h 53m

Sydney Kingsford Smith

Fri 28/8

09:10-18:34

1 stop23h 24m

$1,879

PhiladelphiaMelbourne

PHL - MEL

PHLMEL

Philadelphia

Fri 4/9

08:20-07:30

2 stops33h 10m

Melbourne

Fri 11/9

09:30-22:31

2 stops27h 01m

$1,887

Flights are sorted by cheapest return flights first.

Deals found on 24/7

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Philadelphia to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia 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 Australia

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

Currently, February is the cheapest month in which you can book a flight from Philadelphia to Australia (average of $1,564). Flying from Philadelphia to Australia in December is currently the most expensive (average of $2,673). 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 far ahead should I book a flight from Philadelphia to Australia?

The best time to book flights from Philadelphia to Australia is 38 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Related info for your journey

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

  • What airport do you fly from for flights from Philadelphia to Australia?

    Philadelphia (PHL) is the airport you will fly out of if you book a flight from Philadelphia to Australia. It is only a 11.2 km journey to Philadelphia (PHL) from Philadelphia’s city centre.

  • How long is the flight from Philadelphia to Australia?

    Qantas Airways, Air Canada, and United Airlines can get you from Philadelphia to Australia in just under 27h 35m. Your travel time can differ by up to 3h 40m. Philadelphia and Australia are separated by a distance of 15871 km. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most popular routes from Philadelphia to Australia?

    The most popular route from Philadelphia to Australia is Philadelphia - Sydney Kingsford Smith. You may also consider Philadelphia - Melbourne or Philadelphia - Brisbane.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Philadelphia to Australia 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 Australia?

    Currently, February is the cheapest month in which you can book a flight from Philadelphia to Australia (average of $1,564). Flying from Philadelphia to Australia in December is currently the most expensive (average of $2,673). 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

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By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Australia from Philadelphia.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Philadelphia to Australia flexibly with Cheapflights today.

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