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.

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

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.

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 39% 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 offers the lowest fares from Philadelphia to Sydney?

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

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.

$610 Cheap Flights from Philadelphia to Sydney in 2025/26

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2:30 pm - 9:10 am

PHL

SYD

50h 40m2 stops

11:20 am - 11:48 pm

SYD

PHL

28h 28m1 stop

$939Qantas 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

$946Qantas Airways

Mon, Feb 16 - Tue, Feb 24

2:16 pm - 8:05 am

PHL

SYD

26h 49m1 stop

9:10 am - 5:55 pm

SYD

PHL

22h 45m1 stop

$971Qantas Airways

Tue, Mar 31 - Mon, Apr 20

2:16 pm - 8:05 am

PHL

SYD

26h 49m1 stop

9:10 am - 5:55 pm

SYD

PHL

22h 45m1 stop

$972Qantas Airways

Tue, Mar 31 - Mon, Apr 20

2:30 pm - 9:10 am

PHL

SYD

50h 40m2 stops

11:20 am - 8:16 pm

SYD

PHL

24h 56m1 stop

$974Qantas Airways

Sat, Jan 24 - Mon, Feb 9

2:30 pm - 9:00 am

PHL

SYD

26h 30m1 stop

2:05 pm - 7:47 pm

SYD

PHL

21h 42m1 stop

$1,034Qantas Airways

Wed, Feb 11 - Mon, Feb 23

2:30 pm - 9:00 am

PHL

SYD

26h 30m1 stop

11:20 am - 7:54 pm

SYD

PHL

24h 34m1 stop

$1,035Qantas Airways

Fri, Feb 6 - Thu, Feb 12

2:23 pm - 9:00 am

PHL

SYD

26h 37m1 stop

2:05 pm - 7:47 pm

SYD

PHL

21h 42m1 stop

$1,036Qantas Airways

Mon, Feb 16 - Tue, Feb 24

8:36 am - 6:10 am

PHL

SYD

29h 34m1 stop

11:20 am - 11:39 pm

SYD

PHL

28h 19m1 stop

$1,053Qantas Airways

Tue, Jan 27 - Thu, Feb 12

6:51 am - 7:00 am

PHL

SYD

32h 09m1 stop

12:10 pm - 11:12 pm

SYD

PHL

27h 02m2 stops

$1,068United Airlines

Tue, Dec 30 - Mon, Jan 5

Qantas Airways flights from Philadelphia to Sydney

Our best Qantas Airways deals on Philadelphia to Sydney flight tickets

Qantas Airways

Jan 24

PHL2:30 pmPhiladelphia

50h 40m

2 stops

SYD9:10 amSydney Kingsford Smith

Feb 9

SYD11:20 amSydney Kingsford Smith

28h 28m

1 stop

PHL11:48 pmPhiladelphia

$939

Find similar

Qantas Airways

Feb 16

PHL2:23 pmPhiladelphia

51h 42m

2 stops

SYD10:05 amSydney Kingsford Smith

Feb 24

SYD9:25 pmSydney Kingsford Smith

26h 48m

1 stop

PHL8:13 amPhiladelphia

$946

Find similar

Qantas Airways

Mar 31

PHL2:16 pmPhiladelphia

26h 49m

1 stop

SYD8:05 amSydney Kingsford Smith

Apr 20

SYD9:10 amSydney Kingsford Smith

22h 45m

1 stop

PHL5:55 pmPhiladelphia

$971

Find similar

Delta flights from Philadelphia to Sydney

Our best Delta deals on Philadelphia to Sydney flight tickets

Delta

Jan 24

PHL12:23 pmPhiladelphia

26h 27m

2 stops

SYD6:50 amSydney Kingsford Smith

Feb 1

SYD10:40 amSydney Kingsford Smith

29h 41m

2 stops

PHL12:21 amPhiladelphia

$1,143

Find similar

Delta

Jan 31

PHL12:23 pmPhiladelphia

28h 07m

2 stops

SYD8:30 amSydney Kingsford Smith

Feb 7

SYD10:40 amSydney Kingsford Smith

26h 00m

2 stops

PHL8:40 pmPhiladelphia

$1,218

Find similar

Delta

Dec 24

PHL7:05 amPhiladelphia

33h 25m

2 stops

SYD8:30 amSydney Kingsford Smith

Jan 6

SYD2:15 pmSydney Kingsford Smith

24h 59m

2 stops

PHL11:14 pmPhiladelphia

$2,918

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-11:48 pm

1 stop28h 28m

$939

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

$946

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 3/31

2:16 pm-8:05 am

1 stop26h 49m

Sydney Kingsford Smith

Mon 4/20

9:10 am-5:55 pm

1 stop22h 45m

$971

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 3/31

2:16 pm-8:05 am

1 stop26h 49m

Sydney Kingsford Smith

Mon 4/20

9:10 am-5:55 pm

1 stop22h 45m

$972

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-8:16 pm

1 stop24h 56m

$974

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Wed 2/11

2:30 pm-9:00 am

1 stop26h 30m

Sydney Kingsford Smith

Mon 2/23

2:05 pm-7:47 pm

1 stop21h 42m

$1,034

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Fri 2/6

2:30 pm-9:00 am

1 stop26h 30m

Sydney Kingsford Smith

Thu 2/12

11:20 am-7:54 pm

1 stop24h 34m

$1,035

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 2/16

2:23 pm-9:00 am

1 stop26h 37m

Sydney Kingsford Smith

Tue 2/24

2:05 pm-7:47 pm

1 stop21h 42m

$1,036

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 1/27

8:36 am-6:10 am

1 stop29h 34m

Sydney Kingsford Smith

Thu 2/12

11:20 am-11:39 pm

1 stop28h 19m

$1,053

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 12/30

6:51 am-7:00 am

1 stop32h 09m

Sydney Kingsford Smith

Mon 1/5

12:10 pm-11:12 pm

2 stops27h 02m

$1,068

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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 $1,083. 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 $1,427 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 6% 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 50m
Direct flights	None

The fastest flight from Philadelphia to Sydney takes 22h 50m

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 50m, 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 31% of all bookings. The subsequent popular airlines are Fiji Airways at 18%, Qantas Airways at 18%, and American Airlines at 15%.

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 8,009 reviews	Search Delta flights
United Airlines	PriceFrom $859	Free Cancellation	Rating 7.4 9,095 reviews	Search United Airlines flights
Air Canada	PriceFrom $941	Free Cancellation	Rating 7.1 10,534 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $1,044	Free Cancellation	Rating 7.5 947 reviews	Search Qantas Airways flights
Air New Zealand	PriceFrom $1,220	Free Cancellation	Rating 8.0 554 reviews	Search Air New Zealand flights
Fiji Airways	PriceFrom $1,288	Free Cancellation	Rating 8.1 210 reviews	Search Fiji Airways flights
American Airlines	PriceFrom $1,350	Free Cancellation	Rating 7.2 11,054 reviews	Search American Airlines flights

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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.

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Cheap flights from Philadelphia to Sydney from $610

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 2/27. 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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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 6% 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