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Cheap flights from Philadelphia to Sydney from $898

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 14/3. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
14 Nov — 21 Nov1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Philadelphia to Sydney Kingsford Smith are usually found in September or February, booked 27 days in advance, depart on a Tuesday or Thursday and return on a Thursday

Cheap flight deals from Philadelphia to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 15 October 2025.

Round-trip from

$1,765

One-way from

$898

Popular in

December

Cheapest in

September

Average price

$2,237
Fiji Airways
  • Fiji Airways
  • 14/2-21/2
  • 4 total stops
  • 49h 49m total
  • Philadelphia to Sydney
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Fiji Airways
  • Fiji Airways
  • 14/3
  • 2 total stops
  • 26h 55m total
  • Philadelphia to Sydney
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($739 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($114 potential savings vs. average return price).
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Average for round-trip flights in October 2025
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Find flight deals from Philadelphia to Sydney

Enter your travel dates to find the best prices.

Cheapest flights from Philadelphia to Sydney
Explore the most affordable flight options available from Philadelphia to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 October 2025.

Tue 11/1115:55PHL - SYD
1 stop25h 05mQantas Airways
Tue 18/1106:20SYD - PHL
2 stops28h 44mQantas Airways
Deal found 14/10$1,975
Wed 5/1117:20PHL - SYD
2 stops46h 15mQantas Airways
Wed 12/1111:20SYD - PHL
1 stop21h 58mQantas Airways
Deal found 13/10$1,980
Wed 3/1216:03PHL - SYD
2 stops36h 47mQantas Airways
Wed 14/111:20SYD - PHL
1 stop24h 56mQantas Airways
Deal found 14/10$1,983
Mon 10/1116:03PHL - SYD
1 stop22h 52mQantas Airways
Sun 16/1111:20SYD - PHL
1 stop21h 58mQantas Airways
Deal found 14/10$2,003
Wed 26/1117:07PHL - SYD
2 stops46h 53mQantas Airways
Mon 15/1211:20SYD - PHL
1 stop21h 58mQantas Airways
Deal found 14/10$2,009
Tue 11/1117:20PHL - SYD
2 stops27h 10mFiji Airways
Tue 18/1106:00SYD - PHL
2 stops31h 40mFiji Airways
Deal found 13/10$2,026
Mon 10/1110:27PHL - SYD
1 stop30h 33mAmerican Airlines
Sun 16/1111:20SYD - PHL
1 stop28h 26mAmerican Airlines
Deal found 14/10$2,074
Tue 11/1115:36PHL - SYD
2 stops25h 24mAmerican Airlines
Tue 18/1111:20SYD - PHL
2 stops23h 44mAmerican Airlines
Deal found 14/10$2,080
Wed 5/1115:36PHL - SYD
2 stops25h 24mAmerican Airlines
Wed 12/1111:20SYD - PHL
2 stops24h 31mAmerican Airlines
Deal found 13/10$2,083
Thu 13/1115:55PHL - SYD
1 stop25h 05mQantas Airways
Thu 20/1117:50SYD - PHL
2 stops41h 34mQantas Airways
Deal found 14/10$2,086

Cheapflights Fare Finder

 
Customise your flight search to find flights from Philadelphia to Sydney 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 15 October 2025.
Use the filters below to find and compare flights from Philadelphia to Sydney that are best for you.

Fly from

Philadelphia

Fly to

Sydney

Route

Depart

Return

Price

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 14/2

17:40-12:30

2 stops26h 50m

Sydney Kingsford Smith

Sat 21/2

14:10-21:09

2 stops22h 59m

$1,765

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Thu 19/3

18:35-12:30

2 stops26h 55m

Sydney Kingsford Smith

Thu 26/3

14:10-22:46

2 stops23h 36m

$1,836

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 23/2

17:05-09:00

1 stop23h 55m

Sydney Kingsford Smith

Tue 3/3

06:20-23:39

2 stops33h 19m

$1,975

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 16/2

17:05-12:30

2 stops27h 25m

Sydney Kingsford Smith

Tue 24/2

14:10-21:09

2 stops22h 59m

$2,074

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 24/1

16:35-09:35

2 stops49h 00m

Sydney Kingsford Smith

Mon 9/2

11:20-22:56

2 stops27h 36m

$2,097

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 2/12

12:45-07:00

1 stop26h 15m

Sydney Kingsford Smith

Wed 10/12

12:10-19:41

1 stop23h 31m

$2,099

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Wed 26/11

15:48-09:05

2 stops25h 17m

Sydney Kingsford Smith

Mon 15/12

11:50-12:07

2 stops40h 17m

$2,106

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Wed 3/12

13:15-09:05

3 stops27h 50m

Sydney Kingsford Smith

Wed 14/1

11:20-18:54

2 stops23h 34m

$2,109

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 24/1

14:30-09:00

1 stop26h 30m

Sydney Kingsford Smith

Mon 9/2

14:05-19:06

1 stop21h 01m

$2,111

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 14/3

18:35-12:30

2 stops26h 55m

$898

Flights are sorted by cheapest return flights first.

Deals found on 13/10

Showing 1-10 of 17 results
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Best time to book a flight from Philadelphia to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney 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 Sydney

How far ahead should I book a flight from Philadelphia to Sydney?

Use this chart to determine the optimal time to book a return flight from Philadelphia to Sydney. Price data was last updated on 10 October 2025.

Booking 27 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to Sydney. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Philadelphia to Sydney?

Currently, August is the cheapest month in which you can book a flight from Philadelphia to Sydney (average of $665). Flying from Philadelphia to Sydney in January is currently the most expensive (average of $1,472). 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 Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Philadelphia to Sydney?

    There are many flights that can get you from Philadelphia to Sydney in 23h 55m. Fly via Qantas Airways or Fiji Airways to get the fastest option. The distance between Philadelphia and Sydney is about 15871 km. Both multi-stop and direct flights can be found to your destination and back.

  • Can I find deals for flights from Philadelphia to Sydney that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Sydney flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Sydney.

  • Can I find deals for business class flights from Philadelphia to Sydney?

    Yes. Cheapflights offers flight deals from Philadelphia to Sydney 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 Sydney?

    Currently, August is the cheapest month in which you can book a flight from Philadelphia to Sydney (average of $665). Flying from Philadelphia to Sydney in January is currently the most expensive (average of $1,472). 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

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Katoomba
Penrith
Manly
Terrigal
Randwick
Bondi Beach
Coogee
Cronulla
Leura
Lithgow

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Why should you use Cheapflights to find cheap flight tickets from Philadelphia to Sydney?

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Yes, we can. To see specific flights from Philadelphia to Sydney with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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Of course! You can now track prices for flights from Philadelphia to Sydney and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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