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Cheap flights from Philadelphia to Australia from $780

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
17 Feb — 24 Feb1
1 adult

Cheap flight deals from Philadelphia to Australia

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Australia (AU0). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 February 2025.

Round-trip from

$1,401

One-way from

$780

Popular in

December

Cheapest in

March

Average price

$1,842
United Airlines
  • United Airlines
  • 25/2-11/3
  • 2 total stops
  • 57h 09m total
  • Philadelphia to Australia
12/5
  • 12/5
  • 3 total stops
  • 52h 07m total
  • Philadelphia to Australia
Highest demand for flights based on searches. 14% potential increase in price ($633 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease ($142 potential savings vs. average return price).
Average for round-trip flights in February 2025

Find flight deals from Philadelphia to Australia

Cheapest flights from Philadelphia to Australia
Explore the most affordable flight options available from Philadelphia to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 February 2025.

Tue 25/214:58PHL - SYD
2 stops26h 17mUnited Airlines
Tue 11/311:50SYD - PHL
1 stop26h 09mUnited Airlines
Deal found 11/2$1,401
Tue 11/310:03PHL - SYD
3 stops35h 27mMultiple Airlines
Tue 25/314:00SYD - PHL
3 stops35h 13mMultiple Airlines
Deal found 11/2$1,525
Tue 25/216:29PHL - BNE
2 stops39h 06mMultiple Airlines
Tue 11/322:00BNE - PHL
1 stop21h 11mMultiple Airlines
Deal found 11/2$1,655
Tue 11/310:03PHL - ADL
3 stops35h 42mMultiple Airlines
Tue 25/306:15ADL - PHL
3 stops32h 14mMultiple Airlines
Deal found 11/2$1,686
Tue 25/217:50PHL - BNE
2 stops37h 45mFiji Airways
Tue 11/311:35BNE - PHL
2 stops25h 36mFiji Airways
Deal found 11/2$1,924
Tue 21/1018:35PHL - MEL
2 stops27h 25mMultiple Airlines
Wed 29/1014:10MEL - PHL
3 stops30h 51mMultiple Airlines
Deal found 11/2$2,007
Tue 21/1006:00PHL - MEL
2 stops37h 50mAir New Zealand
Tue 28/1012:05MEL - PHL
2 stops34h 16mAir New Zealand
Deal found 11/2$2,095
Thu 15/508:00PHL - BNE
2 stops37h 00mAir New Zealand
Fri 24/1008:45BNE - PHL
2 stops46h 43mAir New Zealand
Deal found 11/2$2,236
Tue 11/318:49PHL - MEL
2 stops26h 26mFiji Airways
Tue 18/313:45MEL - PHL
2 stops24h 25mFiji Airways
Deal found 11/2$2,241
Sat 19/408:00PHL - SYD
2 stops36h 35mAir New Zealand
Fri 2/511:50SYD - PHL
2 stops37h 55mAir New Zealand
Deal found 10/2$2,260
Tue 4/319:56PHL - MEL
1 stop30h 29mQatar Airways
Tue 11/323:30MEL - PHL
2 stops36h 52mQatar Airways
Deal found 11/2$2,469
Sat 12/422:08PHL - CNS
3 stops47h 17mMultiple Airlines
Tue 29/406:45CNS - PHL
3 stops36h 21mMultiple Airlines
Deal found 11/2$2,547

Find flights from Philadelphia to Australia within your budget

Customise your flight search to find flights from Philadelphia to Australia 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, Cheapflights users made 647,157 searches. Data last updated 12 February 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 25/2

08:00-07:00

1 stop31h 00m

Sydney Kingsford Smith

Tue 11/3

11:50-22:59

1 stop26h 09m

$1,401

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Tue 11/3

10:03-12:30

3 stops35h 27m

Sydney Kingsford Smith

Tue 25/3

14:00-10:13

3 stops35h 13m

$1,525

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Tue 25/2

16:29-22:35

2 stops39h 06m

Brisbane

Tue 11/3

22:00-05:11

1 stop21h 11m

$1,655

PhiladelphiaAdelaide

PHL - ADL

PHLADL

Philadelphia

Tue 11/3

10:03-12:15

3 stops35h 42m

Adelaide

Tue 25/3

06:15-23:59

3 stops32h 14m

$1,686

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Tue 25/2

17:50-22:35

2 stops37h 45m

Brisbane

Tue 11/3

11:35-23:11

2 stops25h 36m

$1,924

PhiladelphiaMelbourne

PHL - MEL

PHLMEL

Philadelphia

Sat 29/3

17:16-19:20

2 stops35h 04m

Melbourne

Thu 10/4

07:30-23:54

2 stops30h 24m

$2,138

PhiladelphiaBrisbane

PHL - BNE

PHLBNE

Philadelphia

Thu 15/5

08:00-11:00

2 stops37h 00m

Brisbane

Fri 24/10

08:45-17:28

2 stops46h 43m

$2,236

PhiladelphiaMelbourne

PHL - MEL

PHLMEL

Philadelphia

Tue 11/3

18:49-12:15

2 stops26h 26m

Melbourne

Tue 18/3

13:45-23:10

2 stops24h 25m

$2,241

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 19/4

08:00-10:35

2 stops36h 35m

Sydney Kingsford Smith

Fri 2/5

11:50-11:45

2 stops37h 55m

$2,260

PhiladelphiaMelbourne

PHL - MEL

PHLMEL

Philadelphia

Tue 4/3

19:56-18:25

1 stop30h 29m

Melbourne

Tue 11/3

23:30-21:22

2 stops36h 52m

$2,469

Flights are sorted by cheapest return flights first.

Deals found on 11/2

Showing 1-10 of 48 results
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Best time to book a flight from Philadelphia to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia from Philadelphia with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Philadelphia to Australia

Get recent, data-driven insights about flights from Philadelphia to Australia including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Philadelphia to Australia?

Currently, May is the cheapest month in which you can book a flight from Philadelphia to Australia (average of $129). Flying from Philadelphia to Australia in October is currently the most expensive (average of $171). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHL to AU?

Find hourly flight availability from Philadelphia to Australia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 February 2025.

When flying from Philadelphia to Australia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Australia by month

Plan your trip to Australia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Australia ranges from 50.0 - 130.0 inches per month. March is typically the wettest month, when rainfall can reach 130.0 mm. September is typically the driest time to visit Australia when rainfall is around 50.0 mm.

Temperature in Australia by month

Plan your trip to Australia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Australia, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 22.0 C. Travellers hoping to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 11.0 C).

Reviews of airlines servicing Australia

Get insights into the airlines that provide service to Australia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Australia. Reviews last updated 12 February 2025.
To help decide which airline to fly from Philadelphia to Australia, see what other customers have to say about Air Tahiti Nui, Emirates and Fiji Airways. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

8.7

Entertainment

7.2

Food

7.8

Comfort

8.0

Overall

8.7

Crew

9.1

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Boarding

8.7

Entertainment

7.2

Food

7.8

Comfort

8.0

Overall

8.7

Crew

9.1

Reviews

1 / 2