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Cheap flights from Philadelphia to Australia from $737

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 7/5. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
21 Mar — 28 Mar1
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 19 February 2026.

Tue 24/317:17
PHL
-
BNE
2 stops33h 53m
Qantas Airways
Fri 10/420:35
BNE
-
PHL
1 stop23h 17m
Qantas Airways
Deal found 16/2$1,376
Fri 20/214:16
PHL
-
SYD
2 stops49h 19m
Qantas Airways
Wed 18/311:20
SYD
-
PHL
1 stop23h 22m
Qantas Airways
Deal found 17/2$1,381
Thu 19/214:16
PHL
-
SYD
2 stops35h 24m
Qantas Airways
Wed 1/410:10
SYD
-
PHL
1 stop34h 41m
Qantas Airways
Deal found 16/2$1,398
Mon 2/314:16
PHL
-
SYD
1 stop26h 44m
Qantas Airways
Mon 16/311:20
SYD
-
PHL
1 stop23h 22m
Qantas Airways
Deal found 16/2$1,454
Sun 8/319:00
PHL
-
SYD
1 stop23h 00m
Qantas Airways
Wed 18/313:05
SYD
-
PHL
1 stop26h 49m
Qantas Airways
Deal found 19/2$1,469
Tue 17/314:18
PHL
-
SYD
1 stop27h 42m
Qantas Airways
Tue 24/313:05
SYD
-
PHL
1 stop21h 20m
Qantas Airways
Deal found 18/2$1,471
Sun 8/319:00
PHL
-
SYD
1 stop23h 00m
American Airlines
Mon 23/311:20
SYD
-
PHL
1 stop26h 39m
American Airlines
Deal found 18/2$1,475
Mon 2/317:20
PHL
-
SYD
2 stops23h 40m
American Airlines
Mon 16/311:20
SYD
-
PHL
1 stop33h 31m
American Airlines
Deal found 16/2$1,476
Sun 8/310:45
PHL
-
SYD
1 stop31h 15m
American Airlines
Wed 18/311:20
SYD
-
PHL
2 stops23h 40m
American Airlines
Deal found 19/2$1,479
Tue 3/314:16
PHL
-
SYD
1 stop26h 44m
Qantas Airways
Tue 17/311:20
SYD
-
PHL
1 stop23h 22m
Qantas Airways
Deal found 17/2$1,486
Tue 3/317:20
PHL
-
SYD
2 stops23h 40m
American Airlines
Tue 17/311:20
SYD
-
PHL
2 stops23h 46m
American Airlines
Deal found 17/2$1,496
Wed 18/317:17
PHL
-
AVV
2 stops38h 58m
Multiple Airlines
Wed 25/306:00
AVV
-
PHL
2 stops28h 42m
Multiple Airlines
Deal found 16/2$1,769

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 19 February 2026.

Round-trip from

$1,376

One-way from

$737

Popular in

December

Cheapest in

April

Average price

$1,516
Qantas Airways
  • Qantas Airways
  • 24/3-10/4
  • 3 total stops
  • 57h 10m total
  • Philadelphia to Australia
Search Deals
7/5
  • 7/5
  • 3 total stops
  • 40h 55m total
  • Philadelphia to Australia
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($409 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($95 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 19 February 2026.
Use the filters below to find and compare flights from Philadelphia to Australia that are best for you.

Fly from

Philadelphia

Fly to

Australia

Route

Depart

Return

Price

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Tue 24/3

17:17-17:10

2 stops33h 53m

Brisbane

Fri 10/4

20:35-05:52

1 stop23h 17m

$1,376

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 17/3

14:18-09:00

1 stop27h 42m

Sydney Kingsford Smith

Tue 24/3

13:05-19:25

1 stop21h 20m

$1,471

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 17/3

14:18-09:00

1 stop27h 42m

Sydney Kingsford Smith

Tue 24/3

11:20-19:46

2 stops23h 26m

$1,479

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 1/3

10:45-09:00

1 stop30h 15m

Sydney Kingsford Smith

Tue 24/3

11:20-20:06

2 stops23h 46m

$1,498

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 29/3

14:18-08:05

1 stop26h 47m

Sydney Kingsford Smith

Wed 8/4

09:10-18:54

1 stop23h 44m

$1,565

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 31/3

14:18-08:05

1 stop26h 47m

Sydney Kingsford Smith

Wed 8/4

17:50-05:52

1 stop26h 02m

$1,565

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 29/3

14:18-08:05

1 stop26h 47m

Sydney Kingsford Smith

Tue 7/4

09:10-18:54

1 stop23h 44m

$1,565

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 31/3

14:18-08:05

1 stop26h 47m

Sydney Kingsford Smith

Sun 5/4

09:10-19:42

1 stop24h 32m

$1,565

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 30/3

14:18-08:05

1 stop26h 47m

Sydney Kingsford Smith

Wed 8/4

17:50-05:52

1 stop26h 02m

$1,565

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 24/3

19:00-09:00

1 stop23h 00m

Sydney Kingsford Smith

Fri 10/4

17:50-05:52

1 stop26h 02m

$1,575

Flights are sorted by cheapest return flights first.

Deals found on 17/2

Showing 1-10 of 60 results
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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 $235). Flying from Philadelphia to Australia in January is currently the most expensive (average of $1,380). 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, American Airlines, and Air New Zealand can get you from Philadelphia to Australia in just under 27h 42m. Your travel time can differ by up to 11h 13m. 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 - 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 $235). Flying from Philadelphia to Australia in January is currently the most expensive (average of $1,380). 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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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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