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Cheap flights from Philadelphia to Sydney from $850

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 6/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
11 Aug — 18 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap 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 12 July 2026.

Sun 8/1120:30
PHL
-
SYD
1 stop42h 20m
Qatar Airways
Wed 18/1115:50
SYD
-
PHL
1 stop38h 50m
Qatar Airways
Deal found 9/7$1,784
Sun 8/1116:05
PHL
-
SYD
1 stop22h 20m
Qantas Airways
Wed 18/1110:20
SYD
-
PHL
2 stops25h 43m
Qantas Airways
Deal found 10/7$1,832
Sun 8/1116:05
PHL
-
SYD
1 stop22h 20m
Multiple Airlines
Wed 18/1110:20
SYD
-
PHL
2 stops25h 43m
Multiple Airlines
Deal found 8/7$1,833
Sat 22/821:30
PHL
-
SYD
1 stop29h 40m
Qatar Airways
Mon 7/920:45
SYD
-
PHL
1 stop31h 45m
Qatar Airways
Deal found 11/7$1,840
Thu 5/1120:30
PHL
-
SYD
1 stop42h 20m
Qatar Airways
Sun 15/1115:50
SYD
-
PHL
1 stop38h 50m
Qatar Airways
Deal found 9/7$1,842
Sun 8/1115:20
PHL
-
SYD
2 stops26h 15m
Air Canada
Wed 18/1111:20
SYD
-
PHL
2 stops43h 24m
Air Canada
Deal found 9/7$1,852
Mon 14/910:05
PHL
-
SYD
2 stops31h 15m
Air Canada
Sun 27/909:20
SYD
-
PHL
2 stops26h 12m
Air Canada
Deal found 8/7$1,853
Sun 1/1116:05
PHL
-
SYD
1 stop22h 20m
Qantas Airways
Sun 8/1117:30
SYD
-
PHL
2 stops42h 40m
Qantas Airways
Deal found 10/7$1,858
Mon 10/807:00
PHL
-
SYD
2 stops34h 20m
Air Canada
Mon 17/809:20
SYD
-
PHL
2 stops43h 29m
Air Canada
Deal found 11/7$1,859

Find 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 12 July 2026.

Round-trip from

$1,784

One-way from

$850

Popular in

December

Cheapest in

February

Average price

$2,306
Qatar Airways
  • Qatar Airways
  • 8/11-18/11
  • 2 total stops
  • 81h 10m total
  • Philadelphia to Sydney
Search Deals
6/8
  • 6/8
  • 3 total stops
  • 50h 01m total
  • Philadelphia to Sydney
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($440 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($105 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 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 12 July 2026.
Use the filters below to find and compare flights from Philadelphia to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 8/11

16:05-06:25

1 stop22h 20m

Sydney Kingsford Smith

Wed 18/11

10:20-20:03

2 stops25h 43m

$1,833

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 8/11

16:05-06:25

1 stop22h 20m

Sydney Kingsford Smith

Wed 18/11

10:20-20:03

2 stops25h 43m

$1,833

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

$1,876

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Thu 5/11

15:55-10:20

2 stops26h 25m

Sydney Kingsford Smith

Sun 15/11

21:25-05:54

1 stop24h 29m

$1,891

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 24/10

15:25-08:35

2 stops50h 10m

Sydney Kingsford Smith

Sat 7/11

11:20-14:44

2 stops43h 24m

$1,921

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 24/10

21:30-22:20

2 stops33h 50m

Sydney Kingsford Smith

Sat 7/11

15:50-14:40

1 stop38h 50m

$1,924

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 2/11

20:30-22:25

2 stops33h 55m

Sydney Kingsford Smith

Sat 7/11

15:50-14:40

1 stop38h 50m

$2,010

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 31/10

17:05-09:35

2 stops49h 30m

Sydney Kingsford Smith

Wed 4/11

11:20-14:44

2 stops43h 24m

$2,089

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Wed 9/12

13:00-06:20

2 stops25h 20m

Sydney Kingsford Smith

Wed 23/12

13:20-23:13

2 stops25h 53m

$2,101
Cheapest one-way

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 8/8

11:06-07:30

2 stops54h 24m

$1,129

Flights are sorted by cheapest return flights first.

Deals found on 10/7

Showing 1-10 of 16 resultsSorted by cheapest first
1
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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?

Booking 58 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, February is the cheapest month in which you can book a flight from Philadelphia to Sydney (average of $1,505). Flying from Philadelphia to Sydney in December is currently the most expensive (average of $2,909). 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 much does it cost for a return flight from Philadelphia to Sydney?

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 22h 20m. Fly via Qantas Airways or Qatar 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, February is the cheapest month in which you can book a flight from Philadelphia to Sydney (average of $1,505). Flying from Philadelphia to Sydney in December is currently the most expensive (average of $2,909). 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
Penrith
Katoomba
Manly
Lithgow
Cronulla
Terrigal
Randwick
Leura
Bondi Beach
Coogee

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

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?

Cheapflights simply makes it quick and affordable to book flights from Philadelphia to Sydney by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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.

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

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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