What is the cheapest airline that flies from Philadelphia to Sydney Kingsford Smith?

Fiji Airways, Qantas Airways, and American Airlines are the most popular carriers operating from Philadelphia to Sydney Kingsford Smith

Which airlines fly to Sydney?

Qantas Airways, Air Canada and United Airlines are the top three most popular airlines that fly to Sydney from Philadelphia according to our data. Qantas Airways is the first choice among our users, with 47% of people opting to fly with this airline when travelling to Sydney. Keep in mind that there are 4 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Philadelphia Airport to Sydney Kingsford Smith Airport?

Prices for flights from Philadelphia Airport to Sydney Kingsford Smith Airport are updated daily.

How old do you have to be to fly from Philadelphia Airport to Sydney Kingsford Smith Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Sydney Kingsford Smith Airport.

What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

The necessary travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$878 Cheap Flights from Philadelphia to Sydney in 2025/26

1 adult

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Find the cheapest flights from Philadelphia to Sydney

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One-way

Cheap return flights

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15:30 - 09:35PHL-SYD

26h 05m2 stops

11:20 - 14:47SYD-PHL

43h 27m2 stops

$1,534Air Canada

Find Deal

Mon, 16 Feb - Tue, 24 Feb

15:30 - 09:35PHL-SYD

26h 05m2 stops

16:00 - 15:49SYD-PHL

39h 49m2 stops

$1,536Air Canada

Find Deal

Wed, 26 Nov - Mon, 15 Dec

14:30 - 09:00PHL-SYD

26h 30m1 stop

14:05 - 20:35SYD-PHL

22h 30m1 stop

$1,571Qantas Airways

Find Deal

Wed, 11 Feb - Sun, 22 Feb

10:45 - 06:55PHL-SYD

28h 10m1 stop

11:20 - 17:30SYD-PHL

22h 10m1 stop

$1,606Qantas Airways

Find Deal

Sun, 7 Dec - Mon, 22 Dec

15:30 - 08:35PHL-SYD

26h 05m2 stops

09:20 - 14:46SYD-PHL

43h 26m2 stops

$1,608Multiple Airlines

Find Deal

Tue, 24 Mar - Fri, 10 Apr

13:57 - 09:00PHL-SYD

27h 03m1 stop

11:20 - 23:46SYD-PHL

28h 26m1 stop

$1,610American Airlines

Find Deal

Tue, 25 Nov - Tue, 2 Dec

16:04 - 09:00PHL-SYD

24h 56m2 stops

11:20 - 17:55SYD-PHL

22h 35m2 stops

$1,614American Airlines

Find Deal

Wed, 26 Nov - Mon, 15 Dec

15:30 - 08:35PHL-SYD

26h 05m2 stops

09:20 - 14:46SYD-PHL

43h 26m3 stops

$1,617Multiple Airlines

Find Deal

Tue, 24 Mar - Fri, 10 Apr

13:15 - 07:00PHL-SYD

25h 45m2 stops

11:20 - 21:31SYD-PHL

26h 11m2 stops

$1,619United Airlines

Find Deal

Sun, 7 Dec - Mon, 22 Dec

09:45 - 07:00PHL-SYD

29h 15m2 stops

12:10 - 19:41SYD-PHL

23h 31m1 stop

$1,634United Airlines

Find Deal

Wed, 26 Nov - Mon, 15 Dec

Air Canada flights from Philadelphia to Sydney

Our best Air Canada deals on Philadelphia to Sydney flight tickets

Air Canada

16 Feb

PHL15:30Philadelphia

26h 05m

2 stops

SYD09:35Sydney Kingsford Smith

24 Feb

SYD11:20Sydney Kingsford Smith

43h 27m

2 stops

PHL14:47Philadelphia

$1,534

Find similar

Air Canada

26 Nov

PHL15:30Philadelphia

26h 05m

2 stops

SYD09:35Sydney Kingsford Smith

15 Dec

SYD16:00Sydney Kingsford Smith

39h 49m

2 stops

PHL15:49Philadelphia

$1,536

Find similar

Air Canada

16 Feb

PHL15:30Philadelphia

26h 05m

2 stops

SYD09:35Sydney Kingsford Smith

24 Feb

SYD11:20Sydney Kingsford Smith

43h 27m

3 stops

PHL14:47Philadelphia

$1,543

Find similar

Fiji Airways flights from Philadelphia to Sydney

Our best Fiji Airways deals on Philadelphia to Sydney flight tickets

Fiji Airways

11 Feb

PHL10:35Philadelphia

34h 00m

2 stops

SYD12:35Sydney Kingsford Smith

3 Mar

SYD14:00Sydney Kingsford Smith

25h 41m

2 stops

PHL23:41Philadelphia

$1,622

Find similar

Fiji Airways

27 Mar

PHL18:35Philadelphia

27h 10m

2 stops

SYD12:45Sydney Kingsford Smith

12 Apr

SYD13:15Sydney Kingsford Smith

32h 25m

2 stops

PHL07:40Philadelphia

$1,790

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 16/2

15:30-09:35

2 stops26h 05m

Sydney Kingsford Smith

Tue 24/2

11:20-14:47

2 stops43h 27m

$1,534

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Wed 26/11

15:30-09:35

2 stops26h 05m

Sydney Kingsford Smith

Mon 15/12

16:00-15:49

2 stops39h 49m

$1,536

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Wed 11/2

14:30-09:00

1 stop26h 30m

Sydney Kingsford Smith

Sun 22/2

14:05-20:35

1 stop22h 30m

$1,571

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

$1,606

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 24/3

15:30-08:35

2 stops26h 05m

Sydney Kingsford Smith

Fri 10/4

09:20-14:46

2 stops43h 26m

$1,608

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

$1,610

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Wed 26/11

16:04-09:00

2 stops24h 56m

Sydney Kingsford Smith

Mon 15/12

11:20-17:55

2 stops22h 35m

$1,614

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 24/3

15:30-08:35

2 stops26h 05m

Sydney Kingsford Smith

Fri 10/4

09:20-14:46

3 stops43h 26m

$1,617

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 7/12

13:15-07:00

2 stops25h 45m

Sydney Kingsford Smith

Mon 22/12

11:20-21:31

2 stops26h 11m

$1,619

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

$1,634

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Philadelphia to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Sydney?

The month of February is, on average, the cheapest month to fly to Sydney from Philadelphia, with most prices found around $1,683. If you aren’t able to travel to Sydney during the month of February, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $1,736.

What is the cheapest day to depart on your flight to Sydney?

Our data shows that Tuesday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $2,083. The most expensive day to fly to Sydney is Wednesday, with ticket prices averaging around $3,852.

How far in advance should I book a flight to Sydney?

You are more likely to see cheaper flights to Sydney from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $2,299 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Philadelphia for as low as $1,770 on momondo.

Can stopping save me money on Philadelphia to Sydney flights?

You could potentially save up to 61% on your flight if you consider stops on a Philadelphia to Sydney flight.

How have Philadelphia to Sydney flight prices changed over time?

As of November 2025, prices for Philadelphia to Sydney flights are approximately 59% cheaper when compared to flights at the same time last year.

When to book flights from Philadelphia to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from Philadelphia to Sydney according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Philadelphia to Sydney (PHL to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Philadelphia to Sydney

Direct flights	None

There are no direct flights from Philadelphia to Sydney. There are no popular flight routes from Philadelphia to Sydney.

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How far is Philadelphia to Sydney Kingsford Smith by plane?
The straight-line distance from Philadelphia to Sydney Kingsford Smith is 15874.2 km. In terms of flight time, this usually takes a little over 23h 35m.
When did momondo last update prices for flights from Philadelphia Airport to Sydney Kingsford Smith Airport?
Prices for flights from Philadelphia Airport to Sydney Kingsford Smith Airport are updated daily.
How old do you have to be to fly from Philadelphia Airport to Sydney Kingsford Smith Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Sydney Kingsford Smith Airport.
What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?
The necessary travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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Why use momondo?

Why should I use momondo to find a flight deal from Philadelphia to Sydney?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Philadelphia to Sydney for you.

Can I find flights from Philadelphia to Sydney with flexible booking policies on momondo?

Yes. All flights to Sydney from Philadelphia on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Philadelphia to Sydney?

momondo provides multiple filters to help you find the best flight to Sydney from Philadelphia. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Philadelphia to Sydney right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Sydney from Philadelphia. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.