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Cheap flights from Philadelphia to Australia from $837

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 28/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
23 Jul — 30 Jul1
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 23 June 2026.

Wed 5/811:06
PHL
-
BNE
3 stops33h 29m
Multiple Airlines
Wed 12/811:35
BNE
-
PHL
3 stops38h 47m
Multiple Airlines
Deal found 21/6$1,650
Thu 13/811:06
PHL
-
BNE
3 stops33h 34m
Multiple Airlines
Wed 26/811:35
BNE
-
PHL
3 stops38h 51m
Multiple Airlines
Deal found 22/6$1,705
Sun 9/811:06
PHL
-
SYD
3 stops34h 44m
Multiple Airlines
Tue 25/813:15
SYD
-
PHL
3 stops37h 11m
Multiple Airlines
Deal found 20/6$1,725
Sat 15/809:51
PHL
-
SYD
3 stops35h 59m
Multiple Airlines
Fri 28/813:15
SYD
-
PHL
3 stops37h 11m
Multiple Airlines
Deal found 21/6$1,738
Mon 2/1120:30
PHL
-
MEL
1 stop29h 20m
Qatar Airways
Wed 11/1123:40
MEL
-
PHL
1 stop31h 00m
Qatar Airways
Deal found 21/6$1,743
Thu 6/821:30
PHL
-
MEL
1 stop29h 20m
Qatar Airways
Wed 19/822:45
MEL
-
PHL
1 stop30h 20m
Qatar Airways
Deal found 19/6$1,758
Sun 8/1120:30
PHL
-
SYD
1 stop42h 20m
Qatar Airways
Wed 18/1115:50
SYD
-
PHL
1 stop38h 50m
Qatar Airways
Deal found 21/6$1,782
Wed 12/810:05
PHL
-
BNE
2 stops31h 00m
Air Canada
Wed 26/810:00
BNE
-
PHL
2 stops42h 49m
Air Canada
Deal found 22/6$1,786
Sun 2/810:05
PHL
-
BNE
2 stops31h 00m
Air Canada
Wed 12/810:00
BNE
-
PHL
2 stops42h 49m
Air Canada
Deal found 18/6$1,788
Tue 22/1219:29
PHL
-
BNE
2 stops45h 51m
Delta
Sun 17/110:40
BNE
-
PHL
2 stops24h 57m
Delta
Deal found 22/6$1,820
Sun 8/1116:05
PHL
-
SYD
1 stop22h 20m
Multiple Airlines
Wed 18/1110:20
SYD
-
PHL
2 stops25h 43m
Multiple Airlines
Deal found 22/6$1,822
Mon 14/910:05
PHL
-
SYD
2 stops31h 15m
Air Canada
Sun 27/909:20
SYD
-
PHL
2 stops43h 27m
Air Canada
Deal found 19/6$1,827

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 23 June 2026.

Round-trip from

$1,650

One-way from

$837

Popular in

December

Cheapest in

February

Average price

$2,202
5/8-12/8
  • 5/8-12/8
  • 6 total stops
  • 72h 16m total
  • Philadelphia to Australia
Search Deals
28/10
  • 28/10
  • 3 total stops
  • 32h 52m total
  • Philadelphia to Australia
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($472 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($109 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 23 June 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

Thu 6/8

21:30-16:50

1 stop29h 20m

Melbourne

Wed 19/8

22:45-15:05

1 stop30h 20m

$1,758

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Mon 31/8

10:05-07:05

2 stops31h 00m

Brisbane

Tue 29/9

10:00-14:47

2 stops42h 47m

$1,786

PhiladelphiaMelbourne

PHL - AVV

PHLAVV

Philadelphia

Mon 2/11

09:15-20:20

3 stops43h 05m

Melbourne Avalon

Wed 11/11

06:00-15:51

3 stops49h 51m

$1,837

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Thu 5/11

15:55-10:20

2 stops26h 25m

Sydney Kingsford Smith

Sun 15/11

21:25-05:54

1 stop24h 29m

$1,880

PhiladelphiaMelbourne

PHL - AVV

PHLAVV

Philadelphia

Thu 17/9

07:00-14:10

3 stops41h 10m

Melbourne Avalon

Mon 28/9

20:55-22:46

3 stops39h 51m

$1,890

PhiladelphiaAdelaide

PHL - ADL

PHLADL

Philadelphia

Wed 5/8

21:30-19:10

2 stops32h 10m

Adelaide

Wed 12/8

18:20-15:05

2 stops34h 15m

$2,006
Fastest return journey

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Sun 2/8

18:30-06:30

1 stop22h 00m

Brisbane

Sun 9/8

10:30-17:24

1 stop20h 54m

$2,007

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Sun 2/8

18:30-06:30

1 stop22h 00m

Brisbane

Wed 12/8

10:30-20:55

1 stop24h 25m

$2,009

PhiladelphiaPerth

PHL - PER

PHLPER

Philadelphia

Wed 5/8

21:30-18:35

1 stop33h 05m

Perth

Wed 12/8

07:30-15:05

2 stops43h 35m

$2,009

PhiladelphiaMelbourne

PHL - MEL

PHLMEL

Philadelphia

Wed 19/8

21:30-16:50

1 stop29h 20m

Melbourne

Sun 23/8

22:45-15:05

1 stop30h 20m

$2,033

Flights are sorted by cheapest return flights first.

Deals found on 19/6

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, August is the cheapest month in which you can book a flight from Philadelphia to Australia (average of $357). Flying from Philadelphia to Australia in July is currently the most expensive (average of $1,809). 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 39 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?

    Qatar Airways, Air Canada, and Qantas Airways can get you from Philadelphia to Australia in just under 26h 25m. Your travel time can differ by up to 4h 35m. 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, August is the cheapest month in which you can book a flight from Philadelphia to Australia (average of $357). Flying from Philadelphia to Australia in July is currently the most expensive (average of $1,809). 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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