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Cheap flights from Philadelphia to Sydney from $877

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
7 Dec — 14 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Philadelphia to Sydney Kingsford Smith are usually found in February or September, 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 7 November 2025.

Round-trip from

$1,534

One-way from

$877

Popular in

December

Cheapest in

February

Average price

$2,121
Air Canada
  • Air Canada
  • 26/11-15/12
  • 4 total stops
  • 65h 54m total
  • Philadelphia to Sydney
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Fiji Airways
  • Fiji Airways
  • 7/2
  • 2 total stops
  • 26h 56m total
  • Philadelphia to Sydney
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($651 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease ($119 potential savings vs. average return price).
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Average for round-trip flights in November 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 7 November 2025.

Wed 26/1115:30PHL - SYD
2 stops26h 05mAir Canada
Mon 15/1216:00SYD - PHL
2 stops39h 49mAir Canada
Deal found 5/11$1,534
Wed 26/1115:45PHL - SYD
1 stop25h 15mQantas Airways
Mon 15/1217:45SYD - PHL
1 stop22h 04mQantas Airways
Deal found 7/11$1,568
Sun 7/1217:00PHL - SYD
1 stop22h 25mQantas Airways
Mon 22/1211:20SYD - PHL
1 stop28h 31mQantas Airways
Deal found 5/11$1,570
Tue 2/1215:45PHL - SYD
1 stop25h 15mQantas Airways
Sun 14/1211:20SYD - PHL
1 stop21h 58mQantas Airways
Deal found 6/11$1,605
Tue 25/1113:57PHL - SYD
1 stop27h 03mAmerican Airlines
Tue 2/1211:20SYD - PHL
1 stop28h 26mAmerican Airlines
Deal found 4/11$1,608
Tue 2/1216:04PHL - SYD
2 stops24h 56mAmerican Airlines
Sun 14/1211:20SYD - PHL
1 stop21h 58mAmerican Airlines
Deal found 6/11$1,613
Wed 3/1215:46PHL - SYD
2 stops25h 14mAmerican Airlines
Sun 21/1211:20SYD - PHL
1 stop22h 10mAmerican Airlines
Deal found 6/11$1,614
Sun 7/1215:35PHL - SYD
2 stops25h 30mUnited Airlines
Mon 22/1212:10SYD - PHL
1 stop21h 12mUnited Airlines
Deal found 5/11$1,617
Wed 26/1109:45PHL - SYD
2 stops29h 15mUnited Airlines
Mon 15/1212:10SYD - PHL
1 stop23h 31mUnited Airlines
Deal found 5/11$1,633
Mon 24/1110:27PHL - SYD
1 stop28h 58mQantas Airways
Mon 1/1211:20SYD - PHL
1 stop28h 26mQantas Airways
Deal found 6/11$1,637

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 7 November 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

Tue 24/3

18:45-09:00

1 stop23h 15m

Sydney Kingsford Smith

Fri 10/4

12:10-21:16

1 stop23h 06m

$1,568

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 23/2

14:14-07:25

1 stop25h 11m

Sydney Kingsford Smith

Tue 3/3

11:20-23:41

1 stop28h 21m

$1,568

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 14/3

18:45-09:00

1 stop23h 15m

Sydney Kingsford Smith

Mon 23/3

17:45-23:49

1 stop21h 04m

$1,568

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 6/12

15:13-09:00

1 stop25h 47m

Sydney Kingsford Smith

Sat 13/12

11:20-17:18

1 stop21h 58m

$1,570

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

$1,605

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 14/3

17:19-09:00

1 stop24h 41m

Sydney Kingsford Smith

Mon 23/3

17:45-23:49

1 stop21h 04m

$1,607

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

$1,608

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Wed 26/11

16:04-09:00

2 stops24h 56m

Sydney Kingsford Smith

Mon 15/12

11:20-20:05

1 stop24h 45m

$1,613

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

$1,633

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 7/2

17:39-12:35

2 stops26h 56m

$877

Flights are sorted by cheapest return flights first.

Deals found on 5/11

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 31 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 $663). Flying from Philadelphia to Sydney in January is currently the most expensive (average of $1,460). 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 15m. Fly via Qantas Airways to get the fastest option. The distance between Philadelphia and Sydney is about 15871 km.

  • What are the cheapest airlines to fly from Philadelphia to Sydney one-way?

    To fly one-way, consider booking your trip with Fiji Airways, which is currently one of the cheapest options available, starting at $877. Qantas Airways flights start at $937 while deals on American Airlines start at $962 one-way.

  • 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 $663). Flying from Philadelphia to Sydney in January is currently the most expensive (average of $1,460). 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
Terrigal
Manly
Randwick
Lithgow
Coogee
Leura
Bondi Beach
Cronulla

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Deals for Philadelphia to Sydney flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

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Can Cheapflights find flights from Philadelphia to Sydney with no change fees?

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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