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Cheap flights from Philadelphia to Australia from $741

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 16/5. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
14 May — 21 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 14 April 2026.

Tue 1/920:30
PHL
-
MEL
1 stop42h 25m
Qatar Airways
Tue 15/915:10
MEL
-
PHL
1 stop31h 50m
Qatar Airways
Deal found 10/4$1,715
Sun 8/1119:50
PHL
-
SYD
1 stop31h 00m
Qatar Airways
Wed 18/1121:40
SYD
-
PHL
1 stop51h 20m
Qatar Airways
Deal found 14/4$1,763
Tue 16/617:40
PHL
-
SYD
1 stop23h 25m
Qantas Airways
Mon 6/709:10
SYD
-
PHL
1 stop23h 18m
Qantas Airways
Deal found 14/4$1,789
Sun 19/417:37
PHL
-
SYD
1 stop23h 53m
Qantas Airways
Mon 11/509:10
SYD
-
PHL
1 stop23h 44m
Qantas Airways
Deal found 14/4$1,792
Sat 26/920:30
PHL
-
SYD
1 stop30h 40m
Qatar Airways
Tue 6/1021:45
SYD
-
PHL
1 stop50h 15m
Qatar Airways
Deal found 12/4$1,819
Thu 29/1020:50
PHL
-
MEL
1 stop41h 55m
Qatar Airways
Tue 10/1116:10
MEL
-
PHL
1 stop32h 50m
Qatar Airways
Deal found 10/4$1,820
Sun 8/1115:55
PHL
-
SYD
2 stops26h 25m
Qantas Airways
Wed 18/1121:25
SYD
-
PHL
1 stop26h 00m
Qantas Airways
Deal found 14/4$1,832
Mon 14/915:35
PHL
-
SYD
1 stop25h 30m
Qantas Airways
Sun 27/909:10
SYD
-
PHL
1 stop23h 24m
Qantas Airways
Deal found 14/4$1,841
Tue 16/617:40
PHL
-
SYD
1 stop23h 25m
Multiple Airlines
Mon 6/712:00
SYD
-
PHL
1 stop24h 57m
Multiple Airlines
Deal found 14/4$1,843
Sun 1/1113:00
PHL
-
SYD
1 stop25h 55m
Qantas Airways
Sun 8/1121:50
SYD
-
PHL
2 stops38h 13m
Qantas Airways
Deal found 12/4$1,844
Thu 28/517:30
PHL
-
MEL
2 stops35h 50m
Multiple Airlines
Thu 4/607:30
MEL
-
PHL
2 stops29h 23m
Multiple Airlines
Deal found 13/4$1,846
Wed 11/1108:45
PHL
-
SYD
1 stop29h 25m
Qantas Airways
Wed 18/1106:00
SYD
-
PHL
2 stops24h 37m
Qantas Airways
Deal found 10/4$1,848

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 14 April 2026.

Round-trip from

$1,715

One-way from

$741

Popular in

December

Cheapest in

February

Average price

$1,947
Qatar Airways
  • Qatar Airways
  • 1/9-15/9
  • 2 total stops
  • 74h 15m total
  • Philadelphia to Australia
Search Deals
16/5
  • 16/5
  • 2 total stops
  • 31h 29m total
  • Philadelphia to Australia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($389 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($94 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 14 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
Fastest return journey

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Wed 13/5

15:42-05:00

1 stop23h 18m

Brisbane

Sun 24/5

20:35-07:00

1 stop24h 25m

$1,903

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Tue 26/5

13:22-05:00

1 stop25h 38m

Brisbane

Tue 2/6

20:35-07:00

1 stop24h 25m

$1,957

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Wed 13/5

14:15-05:00

1 stop24h 45m

Brisbane

Sun 24/5

20:35-08:06

1 stop25h 31m

$1,957

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Wed 13/5

11:15-05:00

1 stop27h 45m

Brisbane

Sun 24/5

20:35-06:47

2 stops24h 12m

$1,964

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Tue 26/5

11:00-05:00

1 stop28h 00m

Brisbane

Tue 2/6

20:35-09:46

2 stops27h 11m

$1,964

PhiladelphiaPerth

PHL - PER

PHLPER

Philadelphia

Sun 6/9

18:30-18:35

2 stops36h 05m

Perth

Tue 15/9

06:00-09:00

2 stops39h 00m

$2,047

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 14/9

10:21-06:50

2 stops30h 29m

Sydney Kingsford Smith

Sun 27/9

09:15-23:00

2 stops27h 45m

$2,056

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Thu 28/5

15:29-05:00

1 stop23h 31m

Brisbane

Thu 4/6

20:35-07:00

1 stop24h 25m

$2,097

PhiladelphiaCoolangatta

PHL - OOL

PHLOOL

Philadelphia

Wed 27/5

17:40-22:05

2 stops38h 25m

Coolangatta Gold Coast

Wed 3/6

08:10-21:02

2 stops26h 52m

$2,104

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Mon 1/6

15:29-05:00

1 stop23h 31m

Brisbane

Sun 14/6

20:35-07:00

1 stop24h 25m

$2,116

Flights are sorted by cheapest return flights first.

Deals found on 13/4

Showing 1-10 of 59 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 $1,365). 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, Qatar Airways, and Delta can get you from Philadelphia to Australia in just under 23h 18m. Your travel time can differ by up to 12h 47m. 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 - Melbourne. You may also consider Philadelphia - Sydney Kingsford Smith or Philadelphia - Melbourne Avalon.

  • 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 $1,365). 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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