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Cheap flights from Philadelphia to Australia from $725

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 13/5. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
11 Apr — 18 Apr1
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 12 March 2026.

Sun 1/1113:00
PHL
-
BNE
1 stop26h 30m
Qantas Airways
Sun 8/1113:10
BNE
-
PHL
1 stop25h 36m
Qantas Airways
Deal found 7/3$1,463
Sun 1/1113:00
PHL
-
MEL
1 stop24h 00m
Qantas Airways
Sun 8/1108:00
MEL
-
PHL
2 stops31h 46m
Qantas Airways
Deal found 7/3$1,498
Sun 1/1110:46
PHL
-
BNE
1 stop28h 44m
Qantas Airways
Mon 9/1113:10
BNE
-
PHL
1 stop33h 14m
Qantas Airways
Deal found 7/3$1,526
Sun 1/1113:00
PHL
-
SYD
1 stop25h 55m
Qantas Airways
Sat 7/1118:45
SYD
-
PHL
2 stops35h 52m
Qantas Airways
Deal found 7/3$1,526
Tue 3/1110:46
PHL
-
SYD
1 stop28h 09m
Qantas Airways
Tue 17/1110:20
SYD
-
PHL
2 stops25h 43m
Qantas Airways
Deal found 9/3$1,533
Sun 1/1110:46
PHL
-
BNE
1 stop28h 44m
Qantas Airways
Tue 10/1113:10
BNE
-
PHL
1 stop25h 36m
Qantas Airways
Deal found 7/3$1,538
Sat 25/418:32
PHL
-
MEL
2 stops34h 48m
Multiple Airlines
Sat 2/507:30
MEL
-
PHL
2 stops29h 17m
Multiple Airlines
Deal found 11/3$1,547
Tue 3/1110:46
PHL
-
SYD
1 stop28h 09m
Qantas Airways
Tue 10/1121:50
SYD
-
PHL
2 stops32h 47m
Qantas Airways
Deal found 10/3$1,566
Sat 31/1017:43
PHL
-
BNE
1 stop22h 07m
Qantas Airways
Sun 8/1113:10
BNE
-
PHL
1 stop25h 36m
Qantas Airways
Deal found 7/3$1,568
Sat 31/1017:43
PHL
-
BNE
1 stop22h 07m
Qantas Airways
Mon 9/1113:10
BNE
-
PHL
1 stop33h 14m
Qantas Airways
Deal found 7/3$1,586
Sat 25/418:32
PHL
-
MEL
2 stops34h 48m
Multiple Airlines
Sat 9/507:30
MEL
-
PHL
2 stops29h 17m
Multiple Airlines
Deal found 8/3$1,586
Sat 25/418:32
PHL
-
MEL
2 stops34h 48m
Fiji Airways
Sat 2/507:30
MEL
-
PHL
2 stops29h 17m
Fiji Airways
Deal found 10/3$1,589

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 12 March 2026.

Round-trip from

$1,547

One-way from

$725

Popular in

December

Cheapest in

April

Average price

$2,114
25/4-2/5
  • 25/4-2/5
  • 4 total stops
  • 64h 05m total
  • Philadelphia to Australia
Search Deals
13/5
  • 13/5
  • 3 total stops
  • 39h 05m total
  • Philadelphia to Australia
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($351 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($86 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 12 March 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

PhiladelphiaMelbourne

PHL - MEL

PHLMEL

Philadelphia

Sat 25/4

18:32-19:20

2 stops34h 48m

Melbourne

Sat 2/5

07:30-22:47

2 stops29h 17m

$1,547

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Tue 24/3

15:44-08:50

2 stops27h 06m

Brisbane

Fri 10/4

07:55-20:34

2 stops26h 39m

$1,671

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Sun 12/4

11:15-05:00

1 stop27h 45m

Brisbane

Sun 19/4

08:45-18:48

2 stops24h 03m

$1,713
Fastest return journey

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Mon 13/4

17:37-05:00

1 stop21h 23m

Brisbane

Tue 21/4

20:35-05:52

1 stop23h 17m

$1,738

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Wed 8/4

18:32-10:05

2 stops25h 33m

Brisbane

Thu 15/10

20:35-07:05

1 stop24h 30m

$1,769

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 27/7

17:43-07:05

1 stop23h 22m

Sydney Kingsford Smith

Mon 24/8

09:10-18:34

1 stop23h 24m

$1,822

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 30/6

17:43-07:05

1 stop23h 22m

Sydney Kingsford Smith

Wed 29/7

09:10-18:28

1 stop23h 18m

$1,822

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Wed 13/5

16:20-20:20

2 stops38h 00m

Brisbane

Sun 24/5

20:35-07:00

1 stop24h 25m

$1,874

PhiladelphiaMelbourne

PHL - MEL

PHLMEL

Philadelphia

Tue 5/5

09:55-10:55

3 stops35h 00m

Melbourne

Tue 19/5

12:10-08:00

2 stops33h 50m

$1,900

PhiladelphiaCoolangatta

PHL - OOL

PHLOOL

Philadelphia

Sat 25/4

12:51-10:45

2 stops31h 54m

Coolangatta Gold Coast

Sat 2/5

11:55-22:34

2 stops24h 39m

$1,944

Flights are sorted by cheapest return flights first.

Deals found on 8/3

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 $232). Flying from Philadelphia to Australia in January is currently the most expensive (average of $1,361). 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, American Airlines, and Air New Zealand can get you from Philadelphia to Australia in just under 27h 06m. Your travel time can differ by up to 4h 48m. 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 $232). Flying from Philadelphia to Australia in January is currently the most expensive (average of $1,361). 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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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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