Find flights
When to book
FAQs

Cheap flights from Philadelphia to Australia from $957

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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
15 Aug — 22 Aug1
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 16 July 2026.

Sat 22/817:48
PHL
-
MEL
2 stops35h 32m
Multiple Airlines
Sat 29/807:30
MEL
-
PHL
2 stops29h 21m
Multiple Airlines
Deal found 12/7$1,700
Wed 14/1021:30
PHL
-
MEL
1 stop34h 35m
Qatar Airways
Wed 28/1023:40
MEL
-
PHL
1 stop31h 00m
Qatar Airways
Deal found 12/7$1,742
Sun 8/1120:30
PHL
-
SYD
1 stop42h 20m
Qatar Airways
Wed 18/1115:50
SYD
-
PHL
1 stop38h 50m
Qatar Airways
Deal found 13/7$1,773
Tue 4/810:05
PHL
-
BNE
2 stops31h 00m
Air Canada
Mon 10/810:00
BNE
-
PHL
2 stops42h 49m
Air Canada
Deal found 12/7$1,784
Mon 24/815:25
PHL
-
BNE
2 stops49h 40m
Air Canada
Tue 15/910:15
BNE
-
PHL
2 stops25h 17m
Air Canada
Deal found 14/7$1,787
Thu 13/817:48
PHL
-
MEL
2 stops35h 32m
Multiple Airlines
Thu 20/807:30
MEL
-
PHL
2 stops30h 49m
Multiple Airlines
Deal found 14/7$1,787
Tue 3/1120:30
PHL
-
MEL
1 stop29h 20m
Qatar Airways
Tue 10/1123:40
MEL
-
PHL
1 stop31h 00m
Qatar Airways
Deal found 16/7$1,803
Mon 21/1215:41
PHL
-
SYD
2 stops26h 39m
Qantas Airways
Wed 30/1214:05
SYD
-
PHL
1 stop21h 28m
Qantas Airways
Deal found 15/7$1,807
Sun 6/921:30
PHL
-
SYD
1 stop29h 40m
Qatar Airways
Sat 26/920:45
SYD
-
PHL
1 stop31h 45m
Qatar Airways
Deal found 12/7$1,810
Sun 8/1116:05
PHL
-
SYD
1 stop22h 20m
Multiple Airlines
Wed 18/1110:25
SYD
-
PHL
2 stops25h 38m
Multiple Airlines
Deal found 15/7$1,820
Sun 8/1116:05
PHL
-
SYD
1 stop22h 20m
Qantas Airways
Wed 18/1110:20
SYD
-
PHL
2 stops25h 43m
Qantas Airways
Deal found 13/7$1,822
Thu 5/1120:30
PHL
-
SYD
1 stop42h 20m
Qatar Airways
Sun 15/1115:50
SYD
-
PHL
1 stop38h 50m
Qatar Airways
Deal found 13/7$1,830

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 16 July 2026.

Round-trip from

$1,700

One-way from

$957

Popular in

December

Cheapest in

February

Average price

$2,292
22/8-29/8
  • 22/8-29/8
  • 4 total stops
  • 64h 53m total
  • Philadelphia to Australia
Search Deals
10/11
  • 10/11
  • 3 total stops
  • 39h 32m total
  • Philadelphia to Australia
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($435 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($104 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 16 July 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

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Thu 5/11

20:30-06:50

1 stop42h 20m

Sydney Kingsford Smith

Tue 17/11

15:50-14:40

1 stop38h 50m

$1,773

PhiladelphiaMelbourne

PHL - AVV

PHLAVV

Philadelphia

Wed 18/11

09:15-23:15

3 stops46h 00m

Melbourne Avalon

Mon 23/11

20:55-22:56

3 stops42h 01m

$1,839

PhiladelphiaMelbourne

PHL - AVV

PHLAVV

Philadelphia

Tue 3/11

09:15-14:05

3 stops36h 50m

Melbourne Avalon

Tue 10/11

06:00-16:21

3 stops50h 21m

$1,843

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Mon 3/8

07:00-07:05

2 stops34h 05m

Brisbane

Thu 13/8

10:15-21:34

2 stops25h 19m

$1,859

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 14/9

21:30-18:50

2 stops31h 20m

Sydney Kingsford Smith

Sun 27/9

20:45-14:30

1 stop31h 45m

$1,864

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Thu 5/11

15:55-10:20

2 stops26h 25m

Sydney Kingsford Smith

Sun 15/11

14:05-20:10

1 stop22h 05m

$1,879

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Thu 5/11

15:55-10:20

2 stops26h 25m

Sydney Kingsford Smith

Tue 17/11

14:05-19:05

1 stop21h 00m

$1,879

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Thu 5/11

15:20-09:35

2 stops26h 15m

Sydney Kingsford Smith

Tue 17/11

11:20-14:44

2 stops43h 24m

$1,896

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 17/10

21:30-22:20

2 stops33h 50m

Sydney Kingsford Smith

Sat 31/10

21:40-15:40

1 stop33h 00m

$1,922

PhiladelphiaCoolangatta

PHL - OOL

PHLOOL

Philadelphia

Sat 29/8

14:45-11:30

3 stops30h 45m

Coolangatta Gold Coast

Sat 5/9

12:30-13:39

3 stops39h 09m

$1,944

Flights are sorted by cheapest return flights first.

Deals found on 12/7

Showing 1-10 of 51 resultsSorted by cheapest first
1
2
3
...
6

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 $357). Flying from Philadelphia to Australia in June is currently the most expensive (average of $1,864). 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 38 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?

    Qatar Airways, Air Canada, and Qantas Airways can get you from Philadelphia to Australia in just under 28h 15m. Your travel time can differ by up to 14h 05m. 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, August is the cheapest month in which you can book a flight from Philadelphia to Australia (average of $357). Flying from Philadelphia to Australia in June is currently the most expensive (average of $1,864). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Philadelphia to Australia. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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.

Can Cheapflights notify me if prices for flights from Philadelphia to Australia become cheaper?

Not ready to book yet? You can track prices for flights from Philadelphia to Australia on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.