Which layover airport offers the lowest fares from Philadelphia to Sydney?

Flights via Houston (IAH) offer the lowest average round-trip price of $880.

Which layover airport has the shortest connection time from Philadelphia to Sydney?

San Francisco (SFO) has the shortest average layover time for this route: 1h 47m.

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

Qantas Airways is the most popular carrier operating from Philadelphia to Sydney Kingsford Smith

What airlines fly to Sydney?

United Airlines, Qantas Airways and Delta are the top three most popular airlines that fly to Sydney from Philadelphia according to our data. United Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Sydney. Keep in mind that there are 10 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest travel time from Philadelphia to Sydney?

Flights connecting via San Francisco (SFO) have the shortest average one-way travel time: 22h 46m.

Which airport is the most popular layover for flights between Philadelphia and Sydney?

Los Angeles (LAX) was the most common stop: 63% of momondo users choosing 1-stop flights on this route connected there.

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 refreshed on a daily basis.

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

As of December 2025, there are 7 operators available to choose from 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 layovers. 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 travel and health documents required for your trip to Sydney Kingsford Smith Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sydney Kingsford Smith Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$580 Cheap Flights from Philadelphia to Sydney in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Philadelphia to Sydney

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:30 pm - 9:10 am

PHL

SYD

50h 40m2 stops

11:20 am - 7:01 am

SYD

PHL

35h 41m1 stop

$941Qantas Airways

Sat, Jan 24 - Mon, Feb 9

2:23 pm - 10:05 am

PHL

SYD

51h 42m2 stops

9:25 pm - 8:13 am

SYD

PHL

26h 48m1 stop

$948Qantas Airways

Mon, Feb 16 - Tue, Feb 24

12:08 pm - 6:55 am

PHL

SYD

26h 47m1 stop

11:20 am - 11:48 pm

SYD

PHL

28h 28m1 stop

$959Qantas Airways

Sun, Jan 25 - Sun, Feb 1

2:30 pm - 8:50 pm

PHL

SYD

38h 20m2 stops

11:20 am - 7:54 pm

SYD

PHL

24h 34m1 stop

$997Qantas Airways

Sun, Feb 1 - Sat, Feb 14

6:59 pm - 9:00 am

PHL

SYD

23h 01m1 stop

5:50 pm - 7:10 am

SYD

PHL

27h 20m1 stop

$1,035Qantas Airways

Tue, Mar 24 - Fri, Apr 10

2:23 pm - 10:05 am

PHL

SYD

51h 42m2 stops

11:20 am - 11:50 pm

SYD

PHL

27h 30m1 stop

$1,039Qantas Airways

Mon, Mar 2 - Mon, Mar 16

2:30 pm - 9:00 am

PHL

SYD

26h 30m1 stop

11:20 am - 7:54 pm

SYD

PHL

24h 34m1 stop

$1,047Qantas Airways

Sun, Feb 1 - Sat, Feb 14

9:40 am - 8:30 am

PHL

SYD

30h 50m2 stops

10:40 am - 5:52 pm

SYD

PHL

23h 12m2 stops

$1,069Delta

Sun, Jan 25 - Sun, Feb 1

12:08 pm - 6:55 am

PHL

SYD

26h 47m1 stop

7:05 am - 11:48 pm

SYD

PHL

32h 43m2 stops

$1,072Qantas Airways

Sun, Jan 25 - Sun, Feb 1

4:00 pm - 6:55 am

PHL

SYD

22h 55m1 stop

6:20 am - 2:27 pm

SYD

PHL

24h 07m2 stops

$1,129Multiple Airlines

Mon, Feb 23 - Tue, Mar 3

Delta flights from Philadelphia to Sydney

Our best Delta deals on Philadelphia to Sydney flight tickets

Delta

Jan 25

PHL9:40 amPhiladelphia

30h 50m

2 stops

SYD8:30 amSydney Kingsford Smith

Feb 1

SYD10:40 amSydney Kingsford Smith

23h 12m

2 stops

PHL5:52 pmPhiladelphia

$1,069

Find similar

Delta

Jan 24

PHL9:40 amPhiladelphia

29h 10m

2 stops

SYD6:50 amSydney Kingsford Smith

Feb 9

SYD10:40 amSydney Kingsford Smith

29h 41m

2 stops

PHL12:21 amPhiladelphia

$1,143

Find similar

Delta

Jan 24

PHL8:00 amPhiladelphia

30h 50m

2 stops

SYD6:50 amSydney Kingsford Smith

Feb 9

SYD2:15 pmSydney Kingsford Smith

24h 35m

2 stops

PHL10:50 pmPhiladelphia

$1,144

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

Mar 1

PHL8:00 amPhiladelphia

32h 45m

2 stops

SYD8:45 amSydney Kingsford Smith

Mar 24

SYD7:15 pmSydney Kingsford Smith

51h 00m

2 stops

PHL7:15 amPhiladelphia

$1,338

Find similar

Air New Zealand

Feb 28

PHL8:35 amPhiladelphia

32h 10m

2 stops

SYD8:45 amSydney Kingsford Smith

Mar 9

SYD7:15 pmSydney Kingsford Smith

51h 00m

2 stops

PHL7:15 amPhiladelphia

$1,346

Find similar

Air New Zealand

Jan 2

PHL6:25 pmPhiladelphia

48h 05m

2 stops

SYD10:30 amSydney Kingsford Smith

Jan 9

SYD12:10 pmSydney Kingsford Smith

25h 42m

1 stop

PHL9:52 pmPhiladelphia

$2,616

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 1/24

2:30 pm-9:10 am

2 stops50h 40m

Sydney Kingsford Smith

Mon 2/9

11:20 am-7:01 am

1 stop35h 41m

$941

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 2/16

2:23 pm-10:05 am

2 stops51h 42m

Sydney Kingsford Smith

Tue 2/24

9:25 pm-8:13 am

1 stop26h 48m

$948

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 1/25

12:08 pm-6:55 am

1 stop26h 47m

Sydney Kingsford Smith

Sun 2/1

11:20 am-11:48 pm

1 stop28h 28m

$959

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 2/1

2:30 pm-8:50 pm

2 stops38h 20m

Sydney Kingsford Smith

Sat 2/14

11:20 am-7:54 pm

1 stop24h 34m

$997

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 3/24

6:59 pm-9:00 am

1 stop23h 01m

Sydney Kingsford Smith

Fri 4/10

5:50 pm-7:10 am

1 stop27h 20m

$1,035

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 3/2

2:23 pm-10:05 am

2 stops51h 42m

Sydney Kingsford Smith

Mon 3/16

11:20 am-11:50 pm

1 stop27h 30m

$1,039

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 2/1

2:30 pm-9:00 am

1 stop26h 30m

Sydney Kingsford Smith

Sat 2/14

11:20 am-7:54 pm

1 stop24h 34m

$1,047

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 1/25

9:40 am-8:30 am

2 stops30h 50m

Sydney Kingsford Smith

Sun 2/1

10:40 am-5:52 pm

2 stops23h 12m

$1,069

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 1/25

12:08 pm-6:55 am

1 stop26h 47m

Sydney Kingsford Smith

Sun 2/1

7:05 am-11:48 pm

2 stops32h 43m

$1,072

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 2/23

4:00 pm-6:55 am

1 stop22h 55m

Sydney Kingsford Smith

Tue 3/3

6:20 am-2:27 pm

2 stops24h 07m

$1,129

Flights are sorted by cheapest round-trip 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

Layovers

What is the cheapest month to fly to Sydney?

In general, February is the cheapest month to fly from Philadelphia to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,059. If you are unable to visit Sydney during the month of February, then departing from Philadelphia during the month September is also very affordable. Most momondo users find prices during this month for around $1,097.

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

The cheapest day to depart from Philadelphia to Sydney is on a Sunday when prices can be found for as low as $1,373. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $1,659.

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

According to our data, the cheapest time of day to fly to Sydney is in the morning. momondo users have found flights departing from Philadelphia to Sydney in the morning for as low as $1,449. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Sydney are more costly in the evening, with an average ticket price of $2,063. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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 $1,425 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Philadelphia for as low as $1,050 on momondo.

Can stopping save me money on Philadelphia to Sydney flights?

You could potentially save up to 9% 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 December 2025, prices for Philadelphia to Sydney flights are approximately 13% 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 round-trip 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

Fastest flight time	22h 42m
Direct flights	None

The fastest flight from Philadelphia to Sydney takes 22h 42m

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?
Philadelphia and Sydney Kingsford Smith are 9863.8 mi apart from one another. Flights usually cover this in 22h 42m, depending on flying conditions and air traffic around both airports.
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 refreshed on a daily basis.
How many operators does momondo search for flights from Philadelphia Airport to Sydney Kingsford Smith Airport?
As of December 2025, there are 7 operators available to choose from 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 layovers. 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 travel and health documents required for your trip to Sydney Kingsford Smith Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sydney Kingsford Smith Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Philadelphia to Sydney?
momondo data reveals that the most frequently booked airline on the route from Philadelphia to Sydney is United Airlines, representing 30% of all bookings. The subsequent popular airlines are Qantas Airways at 19%, Fiji Airways at 18%, and American Airlines at 14%.

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
Delta	PriceFrom $535	Free Cancellation	Rating 7.9 8,021 reviews	Search Delta flights
United Airlines	PriceFrom $859	Free Cancellation	Rating 7.4 9,116 reviews	Search United Airlines flights
Air Canada	PriceFrom $941	Free Cancellation	Rating 7.1 10,562 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $1,044	Free Cancellation	Rating 7.5 957 reviews	Search Qantas Airways flights
Air New Zealand	PriceFrom $1,220	Free Cancellation	Rating 8.0 560 reviews	Search Air New Zealand flights
Fiji Airways	PriceFrom $1,288	Free Cancellation	Rating 8.0 212 reviews	Search Fiji Airways flights
American Airlines	PriceFrom $1,350	Free Cancellation	Rating 7.2 11,069 reviews	Search American Airlines flights

Parramatta

Bondi Beach

Katoomba

Wollongong

Randwick

Coogee

Manly

Penrith

Cronulla

Lithgow

Leura

Charlestown

Terrigal

Swansea

Why use momondo?

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

Finding the right flight to Sydney from Philadelphia is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Sydney quick and easy, saving you time and money.

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?

Once you have performed a search for Philadelphia to Sydney flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to Sydney from Philadelphia are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Sydney trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Tue 1/27

Tue 2/3

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Australia

Airports servicing New South Wales

Popular cities in Australia

Flights to Melbournefrom $659

Flights to Brisbanefrom $701

Flights to Perthfrom $948

Flights to Adelaidefrom $893

Flights to Cairnsfrom $953

Flights to Coolangattafrom $947

Flights to Hobartfrom $899

Flights to Canberrafrom $870

Flights to Darwinfrom $1,080

Flights to Maroochydorefrom $851

Flights to Launcestonfrom $946

Flights to Townsvillefrom $1,075

Cheap flights from Philadelphia to Sydney from $580

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 2/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Philadelphia to Sydney

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Delta flights from Philadelphia to Sydney

Our best Delta deals on Philadelphia to Sydney flight tickets

Air New Zealand flights from Philadelphia to Sydney

Our best Air New Zealand deals on Philadelphia to Sydney flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Philadelphia to Sydney that are best for you.

See travel insights to Sydney from

How to get the cheapest flight ticket from Philadelphia to Sydney

What is the cheapest month to fly to Sydney?

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

The cheapest day to depart from Philadelphia to Sydney is on a Sunday when prices can be found for as low as $1,373. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $1,659.

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

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

Can stopping save me money on Philadelphia to Sydney flights?

You could potentially save up to 9% 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 December 2025, prices for Philadelphia to Sydney flights are approximately 13% more expensive when compared to flights at the same time last year.

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

Qantas Airways is the most popular carrier operating from Philadelphia to Sydney Kingsford Smith

What airlines fly to Sydney?

Which airport is the most popular layover for flights between Philadelphia and Sydney?

Los Angeles (LAX) was the most common stop: 63% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Philadelphia to Sydney?

Flights via Houston (IAH) offer the lowest average round-trip price of $880.

Which layover airport has the shortest travel time from Philadelphia to Sydney?

Flights connecting via San Francisco (SFO) have the shortest average one-way travel time: 22h 46m.

Which layover airport has the shortest connection time from Philadelphia to Sydney?

San Francisco (SFO) has the shortest average layover time for this route: 1h 47m.

When to book flights from Philadelphia to Sydney

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

Fastest flight time

Direct flights

How far is Philadelphia to Sydney Kingsford Smith by plane?

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

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?

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

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

Traveling to a place near Sydney?

Why use momondo?

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

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

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

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

An easier way to manage your Sydney trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Australia

Airports servicing New South Wales