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Cheap flights from Philadelphia to Sydney from $808

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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
18 May — 25 May1
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 18 April 2026.

Sun 8/1119:50
PHL
-
SYD
1 stop31h 00m
Qatar Airways
Wed 18/1121:40
SYD
-
PHL
1 stop51h 20m
Qatar Airways
Deal found 14/4$1,747
Tue 12/517:37
PHL
-
SYD
1 stop23h 28m
Qantas Airways
Tue 19/509:10
SYD
-
PHL
1 stop23h 44m
Qantas Airways
Deal found 15/4$1,774
Sun 19/417:37
PHL
-
SYD
1 stop23h 28m
Qantas Airways
Mon 11/509:10
SYD
-
PHL
1 stop23h 44m
Qantas Airways
Deal found 16/4$1,775
Wed 1/717:40
PHL
-
SYD
1 stop23h 25m
Qantas Airways
Mon 13/709:10
SYD
-
PHL
1 stop23h 18m
Qantas Airways
Deal found 15/4$1,788
Tue 4/818:01
PHL
-
SYD
1 stop23h 04m
Qantas Airways
Tue 1/912:00
SYD
-
PHL
1 stop23h 03m
Qantas Airways
Deal found 16/4$1,791
Sun 8/1115:55
PHL
-
SYD
2 stops31h 40m
Qantas Airways
Wed 18/1121:25
SYD
-
PHL
1 stop26h 00m
Qantas Airways
Deal found 17/4$1,798
Wed 3/615:29
PHL
-
SYD
1 stop25h 36m
Qantas Airways
Wed 17/609:10
SYD
-
PHL
1 stop23h 25m
Qantas Airways
Deal found 16/4$1,799
Sun 19/417:30
PHL
-
SYD
2 stops23h 35m
American Airlines
Mon 4/512:00
SYD
-
PHL
1 stop20h 48m
American Airlines
Deal found 17/4$1,818
Mon 14/913:28
PHL
-
SYD
1 stop27h 37m
American Airlines
Sun 27/909:10
SYD
-
PHL
1 stop23h 24m
American Airlines
Deal found 16/4$1,820

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 18 April 2026.

Round-trip from

$1,774

One-way from

$808

Popular in

December

Cheapest in

February

Average price

$1,930
Qantas Airways
  • Qantas Airways
  • 12/5-19/5
  • 2 total stops
  • 47h 12m total
  • Philadelphia to Sydney
Search Deals
5/8
  • 5/8
  • 3 total stops
  • 34h 15m total
  • Philadelphia to Sydney
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($382 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($92 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 18 April 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

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 14/9

15:10-06:55

2 stops25h 45m

Sydney Kingsford Smith

Sun 27/9

09:30-10:27

2 stops38h 57m

$1,825

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 16/6

17:40-07:05

1 stop23h 25m

Sydney Kingsford Smith

Mon 6/7

12:00-22:57

1 stop24h 57m

$1,827

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 18/5

14:23-06:50

2 stops26h 27m

Sydney Kingsford Smith

Tue 26/5

09:15-22:12

2 stops26h 57m

$1,841

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Wed 1/7

16:14-07:00

2 stops24h 46m

Sydney Kingsford Smith

Mon 13/7

10:20-05:31

2 stops33h 11m

$1,842
Fastest return journey

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 10/5

17:30-07:05

2 stops23h 35m

Sydney Kingsford Smith

Sat 16/5

12:00-21:07

2 stops23h 07m

$1,906

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 5/5

13:26-07:00

3 stops27h 34m

Sydney Kingsford Smith

Fri 29/5

09:30-23:44

2 stops28h 14m

$1,912

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 10/5

13:20-07:00

3 stops27h 40m

Sydney Kingsford Smith

Sat 16/5

09:30-19:37

2 stops24h 07m

$2,016

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 14/9

15:10-06:50

2 stops25h 40m

Sydney Kingsford Smith

Sun 27/9

09:15-00:27

2 stops29h 12m

$2,039

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 15/6

07:23-06:50

2 stops33h 27m

Sydney Kingsford Smith

Fri 26/6

09:15-22:45

2 stops27h 30m

$2,108

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Fri 29/5

14:23-06:50

2 stops26h 27m

Sydney Kingsford Smith

Fri 5/6

09:15-18:06

2 stops22h 51m

$2,178

Flights are sorted by cheapest return flights first.

Deals found on 15/4

Showing 1-10 of 16 resultsSorted by cheapest first
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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 April 2026.

Booking 13 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 $1,476). Flying from Philadelphia to Sydney in December is currently the most expensive (average of $2,792). 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 23h 35m. Fly via United Airlines, Delta, or American Airlines 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 $1,476). Flying from Philadelphia to Sydney in December is currently the most expensive (average of $2,792). 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
Terrigal
Lithgow
Cronulla
Manly
Bondi Beach
Leura
Randwick
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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