What is the cheapest airline that flies from Philadelphia to Australia?

Cathay Pacific, United Airlines, and Qantas Airways are the most popular carriers operating from Philadelphia to Australia

What airlines fly to Australia?

Qantas Airways, United Airlines and Air Canada are the top three most popular airlines that fly to Australia from Philadelphia according to our data. Qantas Airways is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Australia. Keep in mind that there are 13 different airlines that fly to Australia 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 Australia?

Prices for flights from Philadelphia Airport to Australia are updated daily.

How many operators does momondo search for flights from Philadelphia Airport to Australia?

As of April 2026, there are 7 operators available to choose from for flights from Philadelphia Airport to Australia.

How old do you have to be to fly from Philadelphia Airport to Australia?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Philadelphia Airport to Australia.

What documentation or ID do you need to fly to Australia?

The necessary travel and health documents for your Australia 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 license 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.

$576 Cheap Flights from Philadelphia to Australia in 2026

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 Australia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:55 am - 10:10 pm

PHL

SYD

48h 15m

3 stops

6:00 am - 5:37 am

SYD

PHL

37h 37m

3 stops

$1,216Multiple Airlines

Thu, May 21 - Thu, May 28

10:46 am - 12:00 pm

PHL

MEL

35h 14m

3 stops

1:30 pm - 11:20 pm

MEL

PHL

47h 50m

3 stops

$1,235Multiple Airlines

Tue, Aug 4 - Thu, Aug 13

5:37 pm - 7:05 am

PHL

SYD

23h 28m

1 stop

9:10 am - 6:54 pm

SYD

PHL

23h 44m

1 stop

$1,274Qantas Airways

Tue, May 12 - Tue, May 19

5:37 pm - 7:30 am

PHL

SYD

23h 53m

1 stop

9:10 am - 6:35 pm

SYD

PHL

23h 25m

1 stop

$1,276Qantas Airways

Tue, May 19 - Tue, May 26

5:30 pm - 7:05 am

PHL

SYD

23h 35m

2 stops

9:25 pm - 5:50 am

SYD

PHL

22h 25m

1 stop

$1,302American Airlines

Mon, Sep 14 - Sun, Sep 27

5:30 pm - 7:05 am

PHL

SYD

23h 35m

2 stops

9:10 am - 6:34 pm

SYD

PHL

23h 24m

1 stop

$1,303American Airlines

Mon, Sep 14 - Sun, Sep 27

11:30 am - 7:00 am

PHL

SYD

29h 30m

2 stops

9:30 am - 7:18 pm

SYD

PHL

23h 48m

2 stops

$1,306United Airlines

Mon, Sep 14 - Sun, Sep 27

9:55 am - 1:15 pm

PHL

CBR

37h 20m

3 stops

6:20 am - 5:17 pm

CBR

PHL

24h 57m

2 stops

$1,430United Airlines

Tue, May 19 - Tue, May 26

9:30 am - 2:55 pm

PHL

CBR

39h 25m

3 stops

6:30 pm - 10:29 pm

CBR

PHL

41h 59m

3 stops

$2,302Air New Zealand

Tue, May 19 - Tue, May 26

1:04 pm - 4:55 pm

PHL

CNS

37h 51m

3 stops

6:00 am - 10:29 pm

CNS

PHL

30h 29m

3 stops

$2,539Air New Zealand

Thu, Jun 4 - Thu, Jun 11

American Airlines flights from Philadelphia to Australia

Our best American Airlines deals on Philadelphia to Australia flight tickets

American Airlines

Sep 14

PHL5:30 pmPhiladelphia

23h 35m

2 stops

SYD7:05 amSydney Kingsford Smith

Sep 27

SYD9:25 pmSydney Kingsford Smith

22h 25m

1 stop

PHL5:50 amPhiladelphia

$1,302

American Airlines

Sep 14

PHL5:30 pmPhiladelphia

23h 35m

2 stops

SYD7:05 amSydney Kingsford Smith

Sep 27

SYD9:10 amSydney Kingsford Smith

23h 24m

1 stop

PHL6:34 pmPhiladelphia

$1,303

American Airlines

Sep 14

PHL5:30 pmPhiladelphia

23h 35m

2 stops

SYD7:05 amSydney Kingsford Smith

Sep 27

SYD9:25 pmSydney Kingsford Smith

22h 25m

1 stop

PHL5:50 amPhiladelphia

$1,305

United Airlines flights from Philadelphia to Australia

Our best United Airlines deals on Philadelphia to Australia flight tickets

United Airlines

Sep 14

PHL11:30 amPhiladelphia

29h 30m

2 stops

SYD7:00 amSydney Kingsford Smith

Sep 27

SYD9:30 amSydney Kingsford Smith

23h 48m

2 stops

PHL7:18 pmPhiladelphia

$1,306

United Airlines

Sep 14

PHL11:30 amPhiladelphia

29h 25m

2 stops

SYD6:55 amSydney Kingsford Smith

Sep 27

SYD9:30 amSydney Kingsford Smith

23h 22m

2 stops

PHL6:52 pmPhiladelphia

$1,309

United Airlines

Apr 29

PHL6:21 pmPhiladelphia

22h 34m

1 stop

SYD6:55 amSydney Kingsford Smith

May 10

SYD10:20 amSydney Kingsford Smith

20h 39m

1 stop

PHL4:59 pmPhiladelphia

$1,318

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Thu 5/21

7:55 am-10:10 pm

3 stops48h 15m

Sydney Kingsford Smith

Thu 5/28

6:00 am-5:37 am

3 stops37h 37m

$1,216

PhiladelphiaMelbourne

PHL - MEL

PHLMEL

Philadelphia

Tue 8/4

10:46 am-12:00 pm

3 stops35h 14m

Melbourne

Thu 8/13

1:30 pm-11:20 pm

3 stops47h 50m

$1,235

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 5/12

5:37 pm-7:05 am

1 stop23h 28m

Sydney Kingsford Smith

Tue 5/19

9:10 am-6:54 pm

1 stop23h 44m

$1,274

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 5/19

5:37 pm-7:30 am

1 stop23h 53m

Sydney Kingsford Smith

Tue 5/26

9:10 am-6:35 pm

1 stop23h 25m

$1,276

Quickest round-trip

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 9/14

5:30 pm-7:05 am

2 stops23h 35m

Sydney Kingsford Smith

Sun 9/27

9:25 pm-5:50 am

1 stop22h 25m

$1,302

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 9/14

5:30 pm-7:05 am

2 stops23h 35m

Sydney Kingsford Smith

Sun 9/27

9:10 am-6:34 pm

1 stop23h 24m

$1,303

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 9/14

11:30 am-7:00 am

2 stops29h 30m

Sydney Kingsford Smith

Sun 9/27

9:30 am-7:18 pm

2 stops23h 48m

$1,306

PhiladelphiaCanberra

PHL - CBR

PHLCBR

Philadelphia

Tue 5/19

9:55 am-1:15 pm

3 stops37h 20m

Canberra

Tue 5/26

6:20 am-5:17 pm

2 stops24h 57m

$1,430

PhiladelphiaCanberra

PHL - CBR

PHLCBR

Philadelphia

Tue 5/19

9:30 am-2:55 pm

3 stops39h 25m

Canberra

Tue 5/26

6:30 pm-10:29 pm

3 stops41h 59m

$2,302

PhiladelphiaCairns

PHL - CNS

PHLCNS

Philadelphia

Thu 6/4

1:04 pm-4:55 pm

3 stops37h 51m

Cairns

Thu 6/11

6:00 am-10:29 pm

3 stops30h 29m

$2,539

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 Australia

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 Australia?

The month of February is, on average, the cheapest month to fly to Australia from Philadelphia, with most prices found around $1,059. If you aren’t able to travel during the month of February, then book flights to Australia from Philadelphia during March instead. Flights to Australia in March, while not as cheap as those in February, still average around $1,122.

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

You are more likely to see cheaper flights to Australia from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to Australia for around $1,486 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from Philadelphia for as low as $1,136 on momondo.

Can stopping save me money on Philadelphia to Australia flights?

You could potentially save up to 24% on your flight if you consider stops on a Philadelphia to Australia flight.

Cheap Philadelphia to Australia flight deals and tips

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

Fastest flight time	22h 38m
Direct flights	None

The fastest flight from Philadelphia to Australia takes 22h 38m

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

Search flight deals

Frequently asked questions about flying from Philadelphia to Australia

When did momondo last update prices for flights from Philadelphia Airport to Australia?
Prices for flights from Philadelphia Airport to Australia are updated daily.
How many operators does momondo search for flights from Philadelphia Airport to Australia?
As of April 2026, there are 7 operators available to choose from for flights from Philadelphia Airport to Australia.
How old do you have to be to fly from Philadelphia Airport to Australia?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Philadelphia Airport to Australia.
What documentation or ID do you need to fly to Australia?
The necessary travel and health documents for your Australia 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 license 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.

Best airlines flying from Philadelphia to Australia

Compare and see reviews for airlines that fly from Philadelphia to Australia with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $539	Free Cancellation	Rating 7.4 9,622 reviews	Search United Airlines flights
Air Canada	PriceFrom $765	Free Cancellation	Rating 7.1 10,952 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $945	Free Cancellation	Rating 7.5 1,024 reviews	Search Qantas Airways flights
Fiji Airways	PriceFrom $954	Free Cancellation	Rating 8.1 240 reviews	Search Fiji Airways flights
American Airlines	PriceFrom $1,198	Free Cancellation	Rating 7.1 11,648 reviews	Search American Airlines flights
Air New Zealand	PriceFrom $1,418	Free Cancellation	Rating 8.0 632 reviews	Search Air New Zealand flights
Qatar Airways	PriceFrom $1,447	Free Cancellation	Rating 7.4 3,730 reviews	Search Qatar Airways flights

Why use momondo?

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

Finding the right flight to Australia 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 Australia quick and easy, saving you time and money.

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

Flights from Philadelphia to Australia with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo provides multiple filters to help you find the best flight to Australia 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 Australia right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Philadelphia to Australia now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Australia and let you know when they change.