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Cheap flights from Philadelphia to Australia from $878

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 7/2. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
6 Dec — 13 Dec1
1 adult
1 adult, Economy, 0 bags

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 6 November 2025.

Wed 26/1115:30PHL - SYD
2 stops26h 05mAir Canada
Mon 15/1216:00SYD - PHL
2 stops39h 49mAir Canada
Deal found 5/11$1,536
Wed 26/1115:45PHL - SYD
1 stop25h 15mQantas Airways
Mon 15/1217:45SYD - PHL
1 stop29h 42mQantas Airways
Deal found 6/11$1,571
Sun 7/1210:45PHL - SYD
1 stop28h 10mQantas Airways
Mon 22/1211:20SYD - PHL
1 stop22h 10mQantas Airways
Deal found 5/11$1,606
Tue 25/1113:57PHL - SYD
1 stop27h 03mAmerican Airlines
Tue 2/1211:20SYD - PHL
1 stop28h 26mAmerican Airlines
Deal found 4/11$1,610
Wed 26/1116:04PHL - SYD
2 stops24h 56mAmerican Airlines
Mon 15/1211:20SYD - PHL
2 stops22h 35mAmerican Airlines
Deal found 6/11$1,614
Wed 3/1215:46PHL - SYD
2 stops25h 14mAmerican Airlines
Sun 21/1211:20SYD - PHL
1 stop22h 10mAmerican Airlines
Deal found 6/11$1,616
Sun 7/1215:35PHL - SYD
2 stops25h 30mUnited Airlines
Mon 22/1212:10SYD - PHL
1 stop21h 12mUnited Airlines
Deal found 5/11$1,619
Wed 26/1109:45PHL - SYD
2 stops29h 15mUnited Airlines
Mon 15/1212:10SYD - PHL
1 stop23h 31mUnited Airlines
Deal found 5/11$1,634
Mon 24/1110:27PHL - SYD
1 stop28h 58mQantas Airways
Mon 1/1211:20SYD - PHL
1 stop28h 26mQantas Airways
Deal found 6/11$1,639
Tue 25/1112:40PHL - SYD
3 stops28h 25mUnited Airlines
Tue 2/1211:50SYD - PHL
1 stop20h 51mUnited Airlines
Deal found 4/11$1,642
Fri 14/1115:55PHL - BNE
1 stop22h 05mAmerican Airlines
Sun 16/1119:40BNE - PHL
1 stop28h 14mAmerican Airlines
Deal found 4/11$1,834
Sat 8/1115:55PHL - MEL
1 stop25h 35mQantas Airways
Mon 19/106:45MEL - PHL
2 stops29h 31mQantas Airways
Deal found 5/11$1,837

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 6 November 2025.

Round-trip from

$1,534

One-way from

$878

Popular in

December

Cheapest in

February

Average price

$2,122
Air Canada
  • Air Canada
  • 16/2-24/2
  • 4 total stops
  • 69h 32m total
  • Philadelphia to Australia
Search Deals
Fiji Airways
  • Fiji Airways
  • 7/2
  • 2 total stops
  • 26h 56m total
  • Philadelphia to Australia
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($651 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($121 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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 6 November 2025.
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

15:30-07:45

2 stops26h 15m

Brisbane

Fri 10/4

10:00-14:46

2 stops42h 46m

$1,566

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 7/12

10:45-06:55

1 stop28h 10m

Sydney Kingsford Smith

Mon 22/12

11:20-17:30

1 stop22h 10m

$1,606

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 25/11

13:57-09:00

1 stop27h 03m

Sydney Kingsford Smith

Tue 2/12

11:20-23:46

1 stop28h 26m

$1,610

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Wed 26/11

09:45-07:00

2 stops29h 15m

Sydney Kingsford Smith

Mon 15/12

12:10-19:41

1 stop23h 31m

$1,634

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 25/11

12:40-09:05

3 stops28h 25m

Sydney Kingsford Smith

Tue 2/12

11:50-21:10

2 stops25h 20m

$1,642

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 24/11

12:47-07:00

1 stop26h 13m

Sydney Kingsford Smith

Mon 1/12

11:50-12:07

2 stops40h 17m

$1,643

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 6/12

20:05-09:05

2 stops45h 00m

Sydney Kingsford Smith

Mon 22/12

12:10-00:45

3 stops28h 35m

$1,667

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Tue 24/3

18:35-17:10

2 stops32h 35m

Brisbane

Fri 10/4

20:05-07:10

1 stop25h 05m

$1,724

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 24/1

19:45-09:05

2 stops45h 20m

Sydney Kingsford Smith

Mon 9/2

12:10-21:51

2 stops25h 41m

$1,745

PhiladelphiaMelbourne

PHL - MEL

PHLMEL

Philadelphia

Sun 15/2

17:10-22:45

2 stops37h 35m

Melbourne

Sat 28/2

12:00-23:41

1 stop27h 41m

$1,794

Flights are sorted by cheapest return flights first.

Deals found on 5/11

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 $259). Flying from Philadelphia to Australia in July is currently the most expensive (average of $1,365). 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.

What is the cheapest time of day to fly from PHL to AU?

Find hourly flight availability from Philadelphia to Australia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 6 November 2025.

It’s typically best to fly out from Philadelphia to Australia in the morning. Doing so could potentially save you 30% on the flight price compared to flying in the evening, which is usually more expensive.

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 United Airlines can get you from Philadelphia to Australia in just under 27h 03m. Your travel time can differ by up to 2h 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 cheapest airlines to fly from Philadelphia to Australia one-way?

    The cheapest airline one-way is Fiji Airways, with whom users have recently found tickets for as low as $878. However, be on the lookout for offers from Qantas Airways and American Airlines, as they are both options that can get you from Philadelphia to Australia for a low price.

  • 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 $259). Flying from Philadelphia to Australia in July is currently the most expensive (average of $1,365). 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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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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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?

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