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Cheap flights from Philadelphia to Sydney from $855

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 26/10. 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

Cheap return flights

Logo
15:55 - 19:55PHL-SYD
36h 00m2 stops
Logo
09:45 - 21:40SYD-PHL
27h 55m2 stops
$1,868
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Wed, 12 Nov - Tue, 18 Nov
Fiji Airways Logo
10:27 - 12:30PHL-SYD
34h 03m2 stops
Fiji Airways Logo
06:00 - 21:35SYD-PHL
31h 35m2 stops
$1,883Fiji Airways
Find Deal
Tue, 4 Nov - Thu, 13 Nov
Fiji Airways Logo
10:27 - 21:50PHL-SYD
43h 23m2 stops
Fiji Airways Logo
14:10 - 21:40SYD-PHL
23h 30m2 stops
$1,886Fiji Airways
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Tue, 11 Nov - Tue, 18 Nov
Qantas Airways Logo
15:55 - 09:00PHL-SYD
25h 05m1 stop
Qantas Airways Logo
06:20 - 20:30SYD-PHL
30h 10m2 stops
$1,891Qantas Airways
Find Deal
Tue, 11 Nov - Tue, 18 Nov
Qantas Airways Logo
13:40 - 14:50PHL-SYD
33h 10m2 stops
Qantas Airways Logo
14:05 - 20:07SYD-PHL
22h 02m1 stop
$1,902Qantas Airways
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Wed, 26 Nov - Mon, 15 Dec
Qantas Airways Logo
15:51 - 20:50PHL-SYD
37h 59m2 stops
Qantas Airways Logo
11:15 - 19:33SYD-PHL
23h 18m1 stop
$1,924Qantas Airways
Find Deal
Tue, 10 Mar - Tue, 17 Mar
ANA Logo
13:00 - 20:15PHL-SYD
39h 15m2 stops
ANA Logo
21:45 - 13:51SYD-PHL
56h 06m2 stops
$1,936ANA
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Mon, 23 Feb - Tue, 3 Mar
ANA Logo
13:00 - 20:15PHL-SYD
39h 15m2 stops
ANA Logo
12:25 - 21:16SYD-PHL
48h 51m2 stops
$1,947ANA
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Mon, 23 Feb - Tue, 3 Mar
Air New Zealand Logo
08:35 - 08:45PHL-SYD
32h 10m2 stops
Air New Zealand Logo
11:45 - 12:10SYD-PHL
40h 25m2 stops
$1,990Air New Zealand
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Mon, 9 Feb - Mon, 16 Feb
Air New Zealand Logo
06:00 - 08:45PHL-SYD
35h 45m2 stops
Air New Zealand Logo
19:15 - 22:25SYD-PHL
42h 10m2 stops
$2,009Air New Zealand
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Tue, 10 Mar - Tue, 17 Mar

Qantas Airways flights from Philadelphia to Sydney

Our best Qantas Airways deals on Philadelphia to Sydney flight tickets
Qantas Airways
11 Nov
PHL15:55Philadelphia
25h 05m
1 stop
SYD09:00Sydney Kingsford Smith
18 Nov
SYD06:20Sydney Kingsford Smith
30h 10m
2 stops
PHL20:30Philadelphia
$1,891
Find similar
Qantas Airways
26 Nov
PHL13:40Philadelphia
33h 10m
2 stops
SYD14:50Sydney Kingsford Smith
15 Dec
SYD14:05Sydney Kingsford Smith
22h 02m
1 stop
PHL20:07Philadelphia
$1,902
Find similar
Qantas Airways
10 Mar
PHL15:51Philadelphia
37h 59m
2 stops
SYD20:50Sydney Kingsford Smith
17 Mar
SYD11:15Sydney Kingsford Smith
23h 18m
1 stop
PHL19:33Philadelphia
$1,924
Find similar

Air New Zealand flights from Philadelphia to Sydney

Our best Air New Zealand deals on Philadelphia to Sydney flight tickets
Air New Zealand
9 Feb
PHL08:35Philadelphia
32h 10m
2 stops
SYD08:45Sydney Kingsford Smith
16 Feb
SYD11:45Sydney Kingsford Smith
40h 25m
2 stops
PHL12:10Philadelphia
$1,990
Find similar
Air New Zealand
10 Mar
PHL06:00Philadelphia
35h 45m
2 stops
SYD08:45Sydney Kingsford Smith
17 Mar
SYD19:15Sydney Kingsford Smith
42h 10m
2 stops
PHL22:25Philadelphia
$2,009
Find similar
Air New Zealand
3 Dec
PHL12:45Philadelphia
41h 00m
2 stops
SYD21:45Sydney Kingsford Smith
14 Jan
SYD07:45Sydney Kingsford Smith
30h 07m
2 stops
PHL21:52Philadelphia
$2,110
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 12 September 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 12/11

15:55-19:55

2 stops36h 00m

Sydney Kingsford Smith

Tue 18/11

09:45-21:40

2 stops27h 55m

$1,868

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 4/11

10:27-12:30

2 stops34h 03m

Sydney Kingsford Smith

Thu 13/11

06:00-21:35

2 stops31h 35m

$1,883

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 11/11

10:27-21:50

2 stops43h 23m

Sydney Kingsford Smith

Tue 18/11

14:10-21:40

2 stops23h 30m

$1,886

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 11/11

15:55-09:00

1 stop25h 05m

Sydney Kingsford Smith

Tue 18/11

06:20-20:30

2 stops30h 10m

$1,891

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Wed 26/11

13:40-14:50

2 stops33h 10m

Sydney Kingsford Smith

Mon 15/12

14:05-20:07

1 stop22h 02m

$1,902

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 10/3

15:51-20:50

2 stops37h 59m

Sydney Kingsford Smith

Tue 17/3

11:15-19:33

1 stop23h 18m

$1,924

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 23/2

13:00-20:15

2 stops39h 15m

Sydney Kingsford Smith

Tue 3/3

21:45-13:51

2 stops56h 06m

$1,936

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 23/2

13:00-20:15

2 stops39h 15m

Sydney Kingsford Smith

Tue 3/3

12:25-21:16

2 stops48h 51m

$1,947

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 9/2

08:35-08:45

2 stops32h 10m

Sydney Kingsford Smith

Mon 16/2

11:45-12:10

2 stops40h 25m

$1,990

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 10/3

06:00-08:45

2 stops35h 45m

Sydney Kingsford Smith

Tue 17/3

19:15-22:25

2 stops42h 10m

$2,009

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 $1,745. 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 $1,746.

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 $2,040. The most expensive day to fly to Sydney is Wednesday, with ticket prices averaging around $3,771.

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 $2,273 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 $1,716 on momondo.

How have Philadelphia to Sydney flight prices changed over time?

As of September 2025, prices for Philadelphia to Sydney flights are approximately 6% more expensive 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.
Search flight deals

  • 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 24h 00m.

  • 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 $1,296Free cancellationRating
7.4
8,936 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
Penrith
Katoomba
Lithgow
Leura
Manly
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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