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Cheap flights from Philadelphia to Australia from $762

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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
18 Feb — 25 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap 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 January 2026.

Round-trip from

$1,546

One-way from

$762

Popular in

December

Cheapest in

February

Average price

$2,506
Qantas Airways
  • Qantas Airways
  • 18/2-1/3
  • 2 total stops
  • 48h 49m total
  • Philadelphia to Australia
Search Deals
9/2
  • 9/2
  • 3 total stops
  • 34h 55m total
  • Philadelphia to Australia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($396 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 January 2026
Search Deals

Find 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 January 2026.

Wed 18/214:16
PHL
-
SYD
1 stop26h 44m
Qantas Airways
Sun 1/317:45
SYD
-
PHL
1 stop22h 05m
Qantas Airways
Deal found 18/1$1,546
Tue 10/214:30
PHL
-
SYD
1 stop26h 30m
Qantas Airways
Tue 17/211:20
SYD
-
PHL
1 stop24h 28m
Qantas Airways
Deal found 18/1$1,559
Mon 16/214:16
PHL
-
SYD
1 stop26h 44m
Qantas Airways
Tue 24/221:25
SYD
-
PHL
1 stop26h 43m
Qantas Airways
Deal found 19/1$1,561
Wed 4/314:57
PHL
-
SYD
1 stop23h 58m
Qantas Airways
Wed 11/311:20
SYD
-
PHL
1 stop23h 22m
Qantas Airways
Deal found 18/1$1,564
Sun 1/215:35
PHL
-
SYD
2 stops25h 25m
American Airlines
Tue 10/211:20
SYD
-
PHL
2 stops23h 39m
American Airlines
Deal found 17/1$1,570
Tue 31/314:18
PHL
-
SYD
1 stop26h 47m
Qantas Airways
Mon 6/412:00
SYD
-
PHL
1 stop26h 54m
Qantas Airways
Deal found 18/1$1,576
Mon 16/214:31
PHL
-
SYD
2 stops25h 59m
Delta
Wed 4/310:40
SYD
-
PHL
2 stops24h 12m
Delta
Deal found 18/1$1,596
Tue 17/214:16
PHL
-
SYD
1 stop26h 44m
Qantas Airways
Sun 1/317:45
SYD
-
PHL
1 stop22h 05m
Qantas Airways
Deal found 18/1$1,607
Sun 15/208:15
PHL
-
SYD
1 stop29h 55m
Qantas Airways
Tue 3/311:20
SYD
-
PHL
1 stop28h 30m
Qantas Airways
Deal found 18/1$1,641
Wed 18/214:16
PHL
-
SYD
1 stop26h 44m
Qantas Airways
Sat 28/214:05
SYD
-
PHL
1 stop22h 44m
Qantas Airways
Deal found 18/1$1,658
Tue 24/319:00
PHL
-
SYD
1 stop23h 00m
Qantas Airways
Fri 10/409:10
SYD
-
PHL
1 stop23h 44m
Qantas Airways
Deal found 18/1$1,671
Sun 15/214:16
PHL
-
SYD
1 stop26h 44m
Qantas Airways
Sat 21/214:05
SYD
-
PHL
1 stop23h 39m
Qantas Airways
Deal found 17/1$1,672

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 January 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

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 8/3

19:00-09:00

1 stop23h 00m

Sydney Kingsford Smith

Mon 16/3

11:20-19:42

1 stop23h 22m

$1,559

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 16/2

14:16-09:00

1 stop26h 44m

Sydney Kingsford Smith

Mon 23/2

14:05-21:44

1 stop23h 39m

$1,561

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 8/3

19:00-09:00

1 stop23h 00m

Sydney Kingsford Smith

Mon 16/3

11:20-20:10

2 stops23h 50m

$1,570

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 16/2

05:31-08:30

2 stops34h 59m

Sydney Kingsford Smith

Tue 24/2

10:40-17:38

2 stops22h 58m

$1,596

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 8/3

12:59-07:25

2 stops27h 26m

Sydney Kingsford Smith

Mon 16/3

09:40-18:29

2 stops23h 49m

$1,596

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 2/3

05:31-08:30

2 stops34h 59m

Sydney Kingsford Smith

Mon 16/3

13:15-08:50

2 stops34h 35m

$1,596

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 1/3

06:10-06:50

2 stops32h 40m

Sydney Kingsford Smith

Tue 24/3

13:15-00:57

2 stops26h 42m

$1,596

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 16/2

06:55-08:30

2 stops33h 35m

Sydney Kingsford Smith

Mon 23/2

14:15-23:46

2 stops25h 31m

$1,596

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 30/3

14:18-08:05

1 stop26h 47m

Sydney Kingsford Smith

Sat 11/4

09:10-18:54

1 stop23h 44m

$1,671

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 16/2

14:16-09:00

1 stop26h 44m

Sydney Kingsford Smith

Sat 28/2

14:05-21:44

1 stop23h 39m

$1,672

Flights are sorted by cheapest return flights first.

Deals found on 19/1

Showing 1-10 of 56 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, February is the cheapest month in which you can book a flight from Philadelphia to Australia (average of $206). Flying from Philadelphia to Australia in January is currently the most expensive (average of $1,423). 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?

    Delta, Qantas Airways, and Qatar Airways can get you from Philadelphia to Australia in just under 26h 47m. Your travel time can differ by up to 8h 12m. 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, February is the cheapest month in which you can book a flight from Philadelphia to Australia (average of $206). Flying from Philadelphia to Australia in January is currently the most expensive (average of $1,423). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Philadelphia to Australia

See prices for flight routes from nearby airports that may be better suited for you.
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Fly with Cheapflights

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How does Cheapflights help users find flights from Philadelphia to Australia?

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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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