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Cheap flights from Philadelphia to Australia from $724

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 18/5. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
2 May — 9 May1
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 2 April 2026.

Tue 21/408:00
PHL
-
SYD
3 stops37h 50m
Multiple Airlines
Tue 12/513:15
SYD
-
PHL
3 stops37h 10m
Multiple Airlines
Deal found 28/3$1,338
Thu 16/415:41
PHL
-
SYD
3 stops54h 09m
Multiple Airlines
Tue 21/406:00
SYD
-
PHL
3 stops44h 15m
Multiple Airlines
Deal found 30/3$1,385
Sun 26/405:01
PHL
-
SYD
3 stops40h 49m
Multiple Airlines
Sun 10/513:15
SYD
-
PHL
3 stops31h 37m
Multiple Airlines
Deal found 28/3$1,421
Wed 22/408:00
PHL
-
SYD
3 stops37h 50m
Multiple Airlines
Wed 29/406:00
SYD
-
PHL
3 stops37h 13m
Multiple Airlines
Deal found 1/4$1,467
Thu 14/507:55
PHL
-
SYD
3 stops37h 55m
Multiple Airlines
Thu 21/506:00
SYD
-
PHL
3 stops61h 37m
Multiple Airlines
Deal found 30/3$1,476
Fri 15/507:00
PHL
-
MEL
3 stops39h 05m
Multiple Airlines
Fri 22/513:30
MEL
-
PHL
3 stops54h 07m
Multiple Airlines
Deal found 31/3$1,501
Tue 21/408:00
PHL
-
BNE
3 stops36h 40m
Multiple Airlines
Tue 28/411:35
BNE
-
PHL
3 stops31h 59m
Multiple Airlines
Deal found 29/3$1,511
Wed 13/507:00
PHL
-
BNE
3 stops37h 35m
Multiple Airlines
Wed 20/511:35
BNE
-
PHL
3 stops38h 04m
Multiple Airlines
Deal found 29/3$1,528
Mon 20/405:05
PHL
-
SYD
3 stops41h 00m
Multiple Airlines
Sun 26/413:15
SYD
-
PHL
3 stops42h 19m
Multiple Airlines
Deal found 30/3$1,639
Wed 22/408:00
PHL
-
SYD
3 stops37h 50m
Multiple Airlines
Sun 26/413:15
SYD
-
PHL
3 stops36h 25m
Multiple Airlines
Deal found 1/4$1,723
Wed 15/408:00
PHL
-
SYD
3 stops48h 10m
Multiple Airlines
Mon 27/413:15
SYD
-
PHL
3 stops31h 35m
Multiple Airlines
Deal found 1/4$1,789
Sat 9/518:32
PHL
-
MEL
2 stops34h 48m
Fiji Airways
Sat 16/507:30
MEL
-
PHL
2 stops29h 17m
Fiji Airways
Deal found 28/3$1,799

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 2 April 2026.

Round-trip from

$1,338

One-way from

$724

Popular in

December

Cheapest in

April

Average price

$1,384
21/4-12/5
  • 21/4-12/5
  • 6 total stops
  • 75h 00m total
  • Philadelphia to Australia
Search Deals
18/5
  • 18/5
  • 3 total stops
  • 35h 54m total
  • Philadelphia to Australia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($393 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($81 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 2 April 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

Wed 13/5

08:40-05:00

1 stop30h 20m

Brisbane

Sun 24/5

20:35-09:22

2 stops26h 47m

$2,013

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Sun 17/5

15:27-05:00

2 stops23h 33m

Brisbane

Sun 24/5

20:35-06:19

2 stops23h 44m

$2,013

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Wed 13/5

12:53-09:20

2 stops30h 27m

Brisbane

Sun 24/5

20:35-07:00

1 stop24h 25m

$2,030

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Tue 21/4

15:51-15:15

2 stops33h 24m

Brisbane

Tue 19/5

20:35-05:52

1 stop23h 17m

$2,049

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Sat 8/8

15:35-05:00

1 stop23h 25m

Brisbane

Wed 26/8

20:35-08:10

1 stop25h 35m

$2,079

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Thu 13/8

15:25-07:05

2 stops49h 40m

Brisbane

Fri 28/8

10:00-21:34

2 stops25h 34m

$2,086

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 28/4

15:51-06:25

1 stop24h 34m

Sydney Kingsford Smith

Tue 5/5

09:10-18:54

1 stop23h 44m

$2,094

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Sun 6/9

17:34-10:55

2 stops27h 21m

Brisbane

Sat 19/9

17:35-21:10

2 stops41h 35m

$2,104

PhiladelphiaMelbourne

PHL - AVV

PHLAVV

Philadelphia

Wed 9/9

07:00-14:10

3 stops41h 10m

Melbourne Avalon

Mon 14/9

20:55-15:41

3 stops56h 46m

$2,140

PhiladelphiaMelbourne

PHL - MEL

PHLMEL

Philadelphia

Fri 14/8

17:45-05:00

1 stop45h 15m

Melbourne

Tue 1/9

16:05-07:05

2 stops29h 00m

$2,140

Flights are sorted by cheapest return flights first.

Deals found on 29/3

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, September is the cheapest month in which you can book a flight from Philadelphia to Australia (average of $240). Flying from Philadelphia to Australia in January is currently the most expensive (average of $1,405). 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.

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 American Airlines can get you from Philadelphia to Australia in just under 30h 27m. Your travel time can differ by up to 19h 13m. Philadelphia and Australia are separated by a distance of 15377 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 - Adelaide.

  • 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, September is the cheapest month in which you can book a flight from Philadelphia to Australia (average of $240). Flying from Philadelphia to Australia in January is currently the most expensive (average of $1,405). 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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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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