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Cheap flights from Philadelphia to Australia from $964

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 17/6. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
21 Jun — 28 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 22 May 2026.

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$1,676
Tue 7/706:00
PHL
-
SYD
2 stops47h 10m
ANA
Tue 21/720:55
SYD
-
PHL
2 stops31h 15m
ANA
Deal found 22/5$1,707
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$1,758
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$1,798
Sat 30/515:25
PHL
-
SYD
2 stops49h 55m
Air Canada
Sun 14/609:20
SYD
-
PHL
2 stops34h 11m
Air Canada
Deal found 22/5$1,801
Mon 26/1016:35
PHL
-
SYD
2 stops49h 00m
Air Canada
Sun 1/1111:20
SYD
-
PHL
2 stops43h 24m
Air Canada
Deal found 22/5$1,807
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$1,810
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$1,811
Mon 26/1015:20
PHL
-
SYD
2 stops26h 15m
Air Canada
Mon 9/1111:20
SYD
-
PHL
2 stops43h 24m
Air Canada
Deal found 18/5$1,814
Wed 27/510:25
PHL
-
SYD
2 stops30h 55m
Air Canada
Wed 10/609:20
SYD
-
PHL
2 stops43h 28m
Air Canada
Deal found 21/5$1,817
Tue 26/510:05
PHL
-
SYD
2 stops55h 15m
Air Canada
Tue 9/609:20
SYD
-
PHL
2 stops43h 28m
Air Canada
Deal found 21/5$1,824
Fri 4/915:25
PHL
-
BNE
2 stops49h 40m
Air Canada
Mon 14/910:00
BNE
-
PHL
2 stops47h 25m
Air Canada
Deal found 20/5$1,845

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 22 May 2026.

Round-trip from

$1,676

One-way from

$964

Popular in

December

Cheapest in

February

Average price

$2,027
Qantas Airways
  • Qantas Airways
  • 18/10-31/10
  • 3 total stops
  • 65h 11m total
  • Philadelphia to Australia
Search Deals
Delta
  • Delta
  • 17/6
  • 2 total stops
  • 25h 12m total
  • Philadelphia to Australia
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($419 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($97 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 22 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

Mon 8/6

06:00-11:30

3 stops39h 30m

Brisbane

Mon 15/6

10:00-21:33

2 stops49h 33m

$1,814

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

$1,814

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 26/7

10:05-07:20

2 stops31h 15m

Sydney Kingsford Smith

Sat 15/8

09:20-14:49

3 stops43h 29m

$1,890

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 26/7

15:25-07:20

2 stops25h 55m

Sydney Kingsford Smith

Sat 15/8

09:20-10:09

1 stop38h 49m

$1,895

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

$1,925

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 30/6

07:23-06:50

2 stops33h 27m

Sydney Kingsford Smith

Sun 5/7

09:15-08:44

2 stops37h 29m

$2,024

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 14/9

13:00-06:50

2 stops27h 50m

Sydney Kingsford Smith

Sun 27/9

09:15-23:01

2 stops27h 46m

$2,024

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Wed 1/7

07:23-06:50

2 stops33h 27m

Sydney Kingsford Smith

Mon 13/7

09:15-00:57

2 stops29h 42m

$2,025
Fastest return journey

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 29/6

17:40-07:30

1 stop23h 50m

Sydney Kingsford Smith

Tue 14/7

09:10-18:41

1 stop23h 31m

$2,037

PhiladelphiaMelbourne

PHL - MEL

PHLMEL

Philadelphia

Mon 1/6

18:23-08:15

1 stop23h 52m

Melbourne

Mon 15/6

10:55-01:29

1 stop28h 34m

$2,038

Flights are sorted by cheapest return flights first.

Deals found on 21/5

Showing 1-10 of 52 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 $350). Flying from Philadelphia to Australia in October is currently the most expensive (average of $1,494). 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 41 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, Qantas Airways, and Delta can get you from Philadelphia to Australia in just under 23h 23m. Your travel time can differ by up to 16h 07m. 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 - 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 $350). Flying from Philadelphia to Australia in October is currently the most expensive (average of $1,494). 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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