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Cheap flights from Philadelphia to Sydney from $702

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to Sydney departing on 18/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Philadelphia to Sydney (PHL-SYD)

Cheap return flights

Delta Logo
12:47 - 06:35PHL-SYD
27h 48m2 stops
Delta Logo
10:25 - 19:47SYD-PHL
24h 22m2 stops
$1,323Delta
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Wed, 24 Sep - Wed, 8 Oct
Delta Logo
06:45 - 06:35PHL-SYD
33h 50m2 stops
Delta Logo
10:25 - 18:05SYD-PHL
22h 40m2 stops
$1,401Delta
Find Deal
Wed, 24 Sep - Sat, 11 Oct
Delta Logo
12:47 - 06:35PHL-SYD
27h 48m2 stops
Delta Logo
09:25 - 23:19SYD-PHL
27h 54m2 stops
$1,479Delta
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Thu, 18 Sep - Thu, 25 Sep
Logo
05:15 - 07:05PHL-SYD
35h 50m2 stops
Logo
12:10 - 00:57SYD-PHL
26h 47m2 stops
$1,583
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Thu, 4 Sep - Thu, 18 Sep
Fiji Airways Logo
18:43 - 12:45PHL-SYD
27h 02m2 stops
Fiji Airways Logo
14:10 - 21:40SYD-PHL
23h 30m2 stops
$1,766Fiji Airways
Find Deal
Sat, 25 Oct - Tue, 11 Nov
Fiji Airways Logo
18:43 - 12:45PHL-SYD
27h 02m2 stops
Fiji Airways Logo
14:10 - 21:40SYD-PHL
23h 30m2 stops
$1,768Fiji Airways
Find Deal
Sat, 25 Oct - Tue, 11 Nov
Logo
05:20 - 06:55PHL-SYD
34h 35m2 stops
Logo
14:20 - 00:59SYD-PHL
26h 39m2 stops
$1,852
Find Deal
Fri, 24 Oct - Mon, 10 Nov
ANA Logo
12:22 - 20:15PHL-SYD
39h 53m2 stops
ANA Logo
12:25 - 17:29SYD-PHL
45h 04m2 stops
$1,901ANA
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Tue, 11 Nov - Tue, 18 Nov
Air Canada Logo
15:25 - 08:20PHL-SYD
49h 55m2 stops
Air Canada Logo
11:20 - 14:47SYD-PHL
43h 27m2 stops
$1,923Air Canada
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Mon, 20 Oct - Tue, 25 Nov
Air Canada Logo
15:25 - 08:20PHL-SYD
49h 55m2 stops
Air Canada Logo
11:20 - 14:47SYD-PHL
43h 27m3 stops
$1,934Air Canada
Find Deal
Mon, 20 Oct - Tue, 25 Nov

Fiji Airways flights from Philadelphia to Sydney

Our best Fiji Airways deals on Philadelphia to Sydney flight tickets
Fiji Airways
25 Oct
PHL18:43Philadelphia
27h 02m
2 stops
SYD12:45Sydney Kingsford Smith
11 Nov
SYD14:10Sydney Kingsford Smith
23h 30m
2 stops
PHL21:40Philadelphia
$1,766
Find similar
Fiji Airways
25 Oct
PHL18:43Philadelphia
27h 02m
2 stops
SYD12:45Sydney Kingsford Smith
11 Nov
SYD14:10Sydney Kingsford Smith
23h 30m
2 stops
PHL21:40Philadelphia
$1,768
Find similar
Fiji Airways
12 Feb
PHL13:45Philadelphia
40h 05m
2 stops
SYD21:50Sydney Kingsford Smith
21 Feb
SYD14:10Sydney Kingsford Smith
22h 59m
2 stops
PHL21:09Philadelphia
$1,791
Find similar

American Airlines flights from Philadelphia to Sydney

Our best American Airlines deals on Philadelphia to Sydney flight tickets
American Airlines
24 Aug
PHL15:50Philadelphia
25h 15m
2 stops
SYD07:05Sydney Kingsford Smith
7 Sept
SYD09:10Sydney Kingsford Smith
22h 32m
1 stop
PHL17:42Philadelphia
$2,108
Find similar
American Airlines
25 Aug
PHL17:23Philadelphia
23h 42m
1 stop
SYD07:05Sydney Kingsford Smith
8 Sept
SYD09:10Sydney Kingsford Smith
22h 47m
2 stops
PHL17:57Philadelphia
$2,120
Find similar
American Airlines
24 Aug
PHL15:45Philadelphia
25h 20m
1 stop
SYD07:05Sydney Kingsford Smith
7 Sept
SYD09:10Sydney Kingsford Smith
25h 03m
1 stop
PHL20:13Philadelphia
$2,122
Find similar

momondo 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, momondo users made 78,305 searches. Data last updated 20 August 2025.
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

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Wed 24/9

12:47-06:35

2 stops27h 48m

Sydney Kingsford Smith

Wed 8/10

10:25-19:47

2 stops24h 22m

$1,323

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Wed 24/9

06:45-06:35

2 stops33h 50m

Sydney Kingsford Smith

Sat 11/10

10:25-18:05

2 stops22h 40m

$1,401

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Thu 18/9

12:47-06:35

2 stops27h 48m

Sydney Kingsford Smith

Thu 25/9

09:25-23:19

2 stops27h 54m

$1,479

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Thu 4/9

05:15-07:05

2 stops35h 50m

Sydney Kingsford Smith

Thu 18/9

12:10-00:57

2 stops26h 47m

$1,583

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 25/10

18:43-12:45

2 stops27h 02m

Sydney Kingsford Smith

Tue 11/11

14:10-21:40

2 stops23h 30m

$1,766

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 25/10

18:43-12:45

2 stops27h 02m

Sydney Kingsford Smith

Tue 11/11

14:10-21:40

2 stops23h 30m

$1,768

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Fri 24/10

05:20-06:55

2 stops34h 35m

Sydney Kingsford Smith

Mon 10/11

14:20-00:59

2 stops26h 39m

$1,852

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 11/11

12:22-20:15

2 stops39h 53m

Sydney Kingsford Smith

Tue 18/11

12:25-17:29

2 stops45h 04m

$1,901

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 20/10

15:25-08:20

2 stops49h 55m

Sydney Kingsford Smith

Tue 25/11

11:20-14:47

2 stops43h 27m

$1,923

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 20/10

15:25-08:20

2 stops49h 55m

Sydney Kingsford Smith

Tue 25/11

11:20-14:47

3 stops43h 27m

$1,934

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Sydney from

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

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 $1,791. 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 $1,797.

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 $2,101. The most expensive day to fly to Sydney is Wednesday, with ticket prices averaging around $3,885.

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 $2,344 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 $1,768 on momondo.

How have Philadelphia to Sydney flight prices changed over time?

As of August 2025, prices for Philadelphia to Sydney flights are approximately 34% 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 26h 05m.

  • 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 many operators does momondo search for flights from Philadelphia Airport to Sydney Kingsford Smith Airport?

  • 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.

  • What is the most popular airline from Philadelphia to Sydney?

Best airlines flying from Philadelphia to Sydney

Compare and see reviews for airlines that fly from Philadelphia to Sydney with momondo
Airline
Rating
Free cancellation
Price
United AirlinesPriceFrom $1,335Free cancellationRating
7.4
8,928 reviews
Search United Airlines flights

Travelling to a place near Sydney?

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

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.

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