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Cheap flights from Philadelphia to Australia from $1,055

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 19/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
11 Jul — 18 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 11 June 2026.

Fri 4/1217:00
PHL
-
MEL
1 stop24h 30m
Qantas Airways
Thu 10/1206:45
MEL
-
PHL
2 stops26h 33m
Qantas Airways
Deal found 11/6$1,554
Wed 11/1115:55
PHL
-
MEL
1 stop25h 35m
Qantas Airways
Fri 11/1218:30
MEL
-
PHL
2 stops38h 48m
Qantas Airways
Deal found 11/6$1,581
Sun 18/1017:43
PHL
-
SYD
1 stop23h 22m
Qantas Airways
Sat 31/1017:50
SYD
-
PHL
2 stops42h 20m
Qantas Airways
Deal found 8/6$1,676
Tue 16/610:25
PHL
-
BNE
2 stops30h 40m
Air Canada
Sun 12/710:00
BNE
-
PHL
2 stops33h 31m
Air Canada
Deal found 10/6$1,781
Sun 2/815:25
PHL
-
BNE
2 stops25h 40m
Air Canada
Wed 12/810:00
BNE
-
PHL
2 stops42h 49m
Air Canada
Deal found 9/6$1,783
Sun 18/1017:43
PHL
-
SYD
1 stop22h 47m
Qantas Airways
Sat 7/1117:50
SYD
-
PHL
2 stops41h 15m
Qantas Airways
Deal found 10/6$1,792
Mon 19/1007:00
PHL
-
SYD
2 stops34h 20m
Air Canada
Sun 8/1111:20
SYD
-
PHL
2 stops27h 36m
Air Canada
Deal found 8/6$1,793
Mon 14/910:05
PHL
-
SYD
2 stops31h 15m
Air Canada
Sun 27/909:20
SYD
-
PHL
2 stops26h 12m
Air Canada
Deal found 8/6$1,828
Mon 2/1109:15
PHL
-
AVV
3 stops43h 05m
Multiple Airlines
Wed 11/1106:00
AVV
-
PHL
3 stops32h 56m
Multiple Airlines
Deal found 11/6$1,835
Thu 18/610:05
PHL
-
BNE
2 stops55h 00m
Air Canada
Wed 29/710:00
BNE
-
PHL
2 stops42h 49m
Air Canada
Deal found 10/6$1,836
Sun 8/1115:20
PHL
-
SYD
2 stops26h 15m
Air Canada
Wed 18/1111:20
SYD
-
PHL
2 stops43h 24m
Air Canada
Deal found 10/6$1,839
Wed 30/910:05
PHL
-
SYD
2 stops31h 15m
Air Canada
Tue 13/1010:20
SYD
-
PHL
2 stops43h 27m
Air Canada
Deal found 7/6$1,842

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 11 June 2026.

Round-trip from

$1,676

One-way from

$1,055

Popular in

December

Cheapest in

February

Average price

$2,195
Qantas Airways
  • Qantas Airways
  • 18/10-31/10
  • 3 total stops
  • 65h 42m total
  • Philadelphia to Australia
Search Deals
19/10
  • 19/10
  • 2 total stops
  • 30h 15m total
  • Philadelphia to Australia
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($457 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($106 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 11 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

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Sun 2/8

15:25-07:05

2 stops25h 40m

Brisbane

Wed 12/8

10:00-14:49

2 stops42h 49m

$1,783

PhiladelphiaMelbourne

PHL - AVV

PHLAVV

Philadelphia

Mon 2/11

09:15-14:05

3 stops36h 50m

Melbourne Avalon

Wed 11/11

06:00-22:56

3 stops32h 56m

$1,835

PhiladelphiaAdelaide

PHL - ADL

PHLADL

Philadelphia

Sat 7/11

16:35-18:10

3 stops58h 05m

Adelaide

Sat 14/11

18:55-15:51

3 stops60h 26m

$1,875

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Thu 13/8

07:00-11:30

3 stops38h 30m

Brisbane

Tue 25/8

10:15-14:49

2 stops42h 34m

$1,892

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 18/10

15:25-08:20

2 stops49h 55m

Sydney Kingsford Smith

Sat 31/10

10:20-15:44

2 stops44h 24m

$1,910

PhiladelphiaMelbourne

PHL - AVV

PHLAVV

Philadelphia

Thu 5/11

09:15-14:05

3 stops36h 50m

Melbourne Avalon

Thu 19/11

06:00-22:56

3 stops32h 56m

$1,944

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Wed 12/8

07:17-05:00

1 stop31h 43m

Brisbane

Sun 23/8

20:35-07:04

1 stop24h 29m

$1,987
Fastest return journey

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Sun 2/8

18:30-06:30

1 stop22h 00m

Brisbane

Wed 12/8

10:30-17:30

1 stop21h 00m

$2,006

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Sun 2/8

18:30-06:30

1 stop22h 00m

Brisbane

Wed 12/8

10:30-23:45

2 stops27h 15m

$2,011

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Thu 13/8

14:08-05:00

1 stop24h 52m

Brisbane

Tue 25/8

20:35-07:04

1 stop24h 29m

$2,060

Flights are sorted by cheapest return flights first.

Deals found on 10/6

Showing 1-10 of 56 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 $356). Flying from Philadelphia to Australia in October is currently the most expensive (average of $1,520). 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?

    Air Canada, American Airlines, and United Airlines can get you from Philadelphia to Australia in just under 22h. Your travel time can differ by up to 9h 43m. 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, August is the cheapest month in which you can book a flight from Philadelphia to Australia (average of $356). Flying from Philadelphia to Australia in October is currently the most expensive (average of $1,520). 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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Why should you use Cheapflights to find cheap flight tickets from Philadelphia to Australia?

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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