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Cheap flights from Philadelphia to Australia from $923

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 8/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
20 Jun — 27 Jun1
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 21 May 2026.

Sun 8/1117:07
PHL
-
BNE
2 stops33h 03m
Qantas Airways
Sat 14/1113:10
BNE
-
PHL
1 stop21h 53m
Qantas Airways
Deal found 16/5$1,603
Sun 18/1015:29
PHL
-
SYD
1 stop23h 56m
Qantas Airways
Sat 31/1017:50
SYD
-
PHL
2 stops41h 15m
Qantas Airways
Deal found 18/5$1,678
Mon 8/610:05
PHL
-
BNE
2 stops31h 00m
Air Canada
Mon 15/610:00
BNE
-
PHL
2 stops49h 33m
Air Canada
Deal found 18/5$1,759
Thu 18/615:25
PHL
-
BNE
2 stops49h 40m
Air Canada
Wed 29/710:00
BNE
-
PHL
2 stops33h 31m
Air Canada
Deal found 19/5$1,800
Sat 30/515:25
PHL
-
SYD
2 stops49h 55m
Air Canada
Sun 14/609:20
SYD
-
PHL
2 stops34h 11m
Air Canada
Deal found 20/5$1,803
Sun 18/1010:05
PHL
-
BNE
2 stops31h 00m
Multiple Airlines
Sun 1/1106:10
BNE
-
PHL
3 stops31h 46m
Multiple Airlines
Deal found 16/5$1,805
Thu 28/510:05
PHL
-
BNE
2 stops55h 00m
Air Canada
Wed 3/610:00
BNE
-
PHL
2 stops42h 48m
Air Canada
Deal found 16/5$1,811
Mon 14/910:05
PHL
-
SYD
2 stops31h 15m
Air Canada
Sun 27/909:20
SYD
-
PHL
2 stops26h 12m
Air Canada
Deal found 20/5$1,811
Tue 11/817:45
PHL
-
MEL
2 stops35h 35m
Multiple Airlines
Sat 15/807:30
MEL
-
PHL
2 stops29h 17m
Multiple Airlines
Deal found 17/5$1,812
Sun 8/1115:20
PHL
-
SYD
2 stops26h 15m
Air Canada
Wed 18/1111:20
SYD
-
PHL
2 stops43h 24m
Air Canada
Deal found 20/5$1,812
Mon 2/1117:07
PHL
-
MEL
1 stop43h 53m
Qantas Airways
Wed 11/1110:15
MEL
-
PHL
2 stops25h 48m
Qantas Airways
Deal found 16/5$1,821
Sun 11/1010:05
PHL
-
SYD
2 stops31h 15m
Air Canada
Mon 19/1010:20
SYD
-
PHL
2 stops43h 27m
Air Canada
Deal found 19/5$1,826

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 21 May 2026.

Round-trip from

$1,603

One-way from

$923

Popular in

December

Cheapest in

February

Average price

$2,028
Qantas Airways
  • Qantas Airways
  • 8/11-14/11
  • 3 total stops
  • 54h 56m total
  • Philadelphia to Australia
Search Deals
8/8
  • 8/8
  • 1 total stop
  • 46h 03m total
  • Philadelphia to Australia
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($420 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($96 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 21 May 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

Tue 30/6

10:05-07:05

2 stops31h 00m

Brisbane

Tue 7/7

10:15-21:34

2 stops25h 19m

$1,759

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Sun 18/10

10:05-07:05

2 stops31h 00m

Brisbane

Sun 1/11

06:10-23:56

3 stops31h 46m

$1,805

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Mon 10/8

15:25-07:05

2 stops25h 40m

Brisbane

Mon 24/8

19:05-22:46

3 stops41h 41m

$1,815

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Mon 8/6

06:00-11:30

3 stops39h 30m

Brisbane

Mon 15/6

10:00-21:33

2 stops49h 33m

$1,815

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Mon 10/8

15:37-05:00

1 stop23h 23m

Brisbane

Mon 24/8

20:35-18:34

1 stop35h 59m

$1,926

PhiladelphiaCairns

PHL - CNS

PHLCNS

Philadelphia

Fri 6/11

15:20-14:55

3 stops32h 35m

Cairns

Wed 25/11

06:00-22:56

3 stops31h 56m

$1,926

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Sun 18/10

15:35-05:00

1 stop23h 25m

Brisbane

Sun 1/11

09:15-23:56

1 stop28h 41m

$1,970

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 31/5

12:07-06:50

2 stops28h 43m

Sydney Kingsford Smith

Tue 16/6

09:15-00:59

2 stops29h 44m

$2,027

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 2/6

10:32-06:50

2 stops30h 18m

Sydney Kingsford Smith

Wed 10/6

09:15-21:19

2 stops26h 04m

$2,027

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 1/6

08:05-06:50

2 stops32h 45m

Sydney Kingsford Smith

Tue 9/6

09:15-21:19

2 stops26h 04m

$2,027

Flights are sorted by cheapest return flights first.

Deals found on 16/5

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, August is the cheapest month in which you can book a flight from Philadelphia to Australia (average of $351). Flying from Philadelphia to Australia in October is currently the most expensive (average of $1,495). 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 42 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, Delta, and United Airlines can get you from Philadelphia to Australia in just under 23h 47m. Your travel time can differ by up to 7h 13m. Philadelphia and Australia are separated by a distance of 16549 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 - 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 $351). Flying from Philadelphia to Australia in October is currently the most expensive (average of $1,495). 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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