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$610+ Cheap flights from Philadelphia (PHL) to Sydney (SYD)

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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SYD
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheapflights Tip: The best prices from Philadelphia to Sydney Kingsford Smith are usually found in February or September, booked 42 days in advance, depart on a Sunday or Wednesday and return on a Monday

Cheap flight deals from Philadelphia to Sydney

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

This United Airlines deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:50 pmPHL - SYD
1 stop45h 10mUnited Airlines
Thu 1/152:00 pmSYD - PHL
1 stop23h 52mUnited Airlines
Deal found 12/10$1,146
This Delta deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2411:40 amPHL - SYD
2 stops51h 10mDelta
Wed 12/3110:40 amSYD - PHL
2 stops38h 45mDelta
Deal found 12/10$1,286
This oojo deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/115:00 pmPHL - SYD
2 stops29h 50mQantas Airways
Thu 12/187:15 pmSYD - PHL
2 stops35h 23mQantas Airways
Deal found 12/10$1,423
This Qantas Airways deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/242:30 pmPHL - SYD
2 stops39h 00mQantas Airways
Wed 12/315:45 pmSYD - PHL
1 stop29h 43mQantas Airways
Deal found 12/10$1,680
This United Airlines deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:37 pmPHL - SYD
3 stops28h 28mUnited Airlines
Wed 12/312:00 pmSYD - PHL
2 stops40h 11mUnited Airlines
Deal found 12/10$1,742
This Delta deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:05 amPHL - SYD
2 stops56h 45mDelta
Tue 1/610:40 amSYD - PHL
2 stops39h 51mDelta
Deal found 12/10$1,868
This United Airlines deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:37 pmPHL - SYD
2 stops28h 28mUnited Airlines
Mon 1/511:50 amSYD - PHL
2 stops37h 47mUnited Airlines
Deal found 12/10$1,917
This Air Canada deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:50 amPHL - SYD
2 stops33h 45mAir Canada
Thu 1/154:00 pmSYD - PHL
2 stops38h 47mAir Canada
Deal found 12/11$1,970

Find flight deals from Philadelphia to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Sydney (SYD). 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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$975
(oojo)

One-way from

$610
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,929
Provider with most accurate pricing for Philadelphia-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Sydney Kingsford Smith flights.
Search Deals
From Philadelphia to Sydney Kingsford Smith
Search Deals
One-way flight from Philadelphia to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($194 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize 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, Cheapflights users made 2,558,603 searches. Data last updated December 12, 2025.
Use the filters below to find and compare flights from Philadelphia to Sydney that are best for you.

Fly from

Philadelphia

Fly to

Sydney

Route

Depart

Return

Price

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 2/23

2:18 pm-9:00 am

1 stop26h 42m

Sydney Kingsford Smith

Tue 3/3

7:15 pm-5:47 pm

2 stops38h 32m

$975

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

Thu 3/12

12:45 pm-12:40 pm

2 stops32h 55m

Sydney Kingsford Smith

Wed 3/25

11:45 am-11:05 pm

2 stops26h 20m

$1,054

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 3/1

4:00 pm-6:55 am

1 stop22h 55m

Sydney Kingsford Smith

Sun 5/31

12:00 pm-9:05 pm

1 stop23h 05m

$1,118

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 1/17

7:45 pm-6:20 am

2 stops42h 35m

Sydney Kingsford Smith

Sat 1/31

2:00 pm-11:30 pm

2 stops25h 30m

$1,142

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 1/24

12:16 pm-8:30 am

2 stops28h 14m

Sydney Kingsford Smith

Sun 2/1

10:40 am-8:40 pm

2 stops26h 00m

$1,143

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sat 1/24

2:30 pm-8:30 am

2 stops26h 00m

Sydney Kingsford Smith

Mon 2/9

10:40 am-8:40 pm

2 stops26h 00m

$1,143

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Mon 12/29

5:50 pm-7:00 am

1 stop45h 10m

Sydney Kingsford Smith

Thu 1/15

2:00 pm-9:52 pm

1 stop23h 52m

$1,146

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Sun 3/1

5:10 pm-2:25 pm

2 stops29h 15m

Sydney Kingsford Smith

Tue 3/24

11:20 am-8:00 pm

1 stop23h 40m

$1,157

PhiladelphiaSydney

PHL - SYD

PHLSYD

Philadelphia

Wed 1/28

6:00 am-8:40 am

3 stops34h 40m

$610

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 16 results
1
2

Compare providers for flights from Philadelphia to Sydney

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Sydney in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Philadelphia-Sydney flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Philadelphia-Sydney flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Philadelphia-Sydney flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-Sydney flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Sydney flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Philadelphia to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Philadelphia with our price prediction graph.
Estimated round-trip 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.

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to Sydney

How far ahead should I book a flight from Philadelphia to Sydney?

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to Sydney. Price data was last updated on December 5, 2025.

To ensure you get the cheapest price possible for a flight from Philadelphia to Sydney, you should look to book at least 27 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, August is the cheapest month in which you can book a flight from Philadelphia to Sydney (average of $403). Flying from Philadelphia to Sydney in January is currently the most expensive (average of $949). 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 SYD?

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

It’s typically best to fly out from Philadelphia to Sydney in the morning. Doing so could potentially save you 29% on the flight price compared to flying in the evening, which is usually more expensive.

How much does it cost to fly round-trip from Philadelphia to Sydney?

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. 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 Sydney. Reviews last updated December 12, 2025.
Peruse reviews from past customers who have flown with Fiji Airways, Qantas Airways, and United Airlines from Philadelphia to Sydney to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Fiji Airways
8.1
Very good
210 reviews

Entertainment

7.5

Overall

8.1

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.5

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.
Fiji Airways
8.1
Very good
210 reviews
Fiji Airways
8.1
Very good
210 reviews

Entertainment

7.5

Overall

8.1

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.5

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.
Qantas Airways
7.5
Good
947 reviews
Fiji Airways
8.1
Very good
210 reviews

Entertainment

7.5

Overall

8.1

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.5

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.
United Airlines
7.4
Good
9,095 reviews
Fiji Airways
8.1
Very good
210 reviews

Entertainment

7.5

Overall

8.1

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.5

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.
American Airlines
7.2
Good
11,050 reviews
Fiji Airways
8.1
Very good
210 reviews

Entertainment

7.5

Overall

8.1

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.5

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.
Air Canada
7.1
Good
10,516 reviews
Fiji Airways
8.1
Very good
210 reviews

Entertainment

7.5

Overall

8.1

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.5

Reviews

1 / 17
10.0
Excellent

Anonymous,Oct 2025

CNS - NAN

Food service: Outstanding. Comfort of seating and usual things: Also outstanding.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Philadelphia to Sydney?

    Departing from Philadelphia to Sydney will take you 26h 42m. There are 9862 mi between Philadelphia and Sydney. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Philadelphia to Sydney round-trip?

    According to our current data, Delta ($487), United Airlines ($859), and Air Canada ($941) offers the cheapest pricing from Philadelphia to Sydney. Delta is priced at 65% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Philadelphia to Sydney one-way?

    The cheapest airline one-way is Fiji Airways, with whom users have recently found tickets for as low as $623. However, be on the lookout for offers from Qantas Airways and American Airlines, as they are both options that can get you from Philadelphia to Sydney for a low price.

  • Can I find deals for flights from Philadelphia to Sydney that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Sydney flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Sydney.

  • Can I find deals for business class flights from Philadelphia to Sydney?

    Yes. Cheapflights offers flight deals from Philadelphia to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, August is the cheapest month in which you can book a flight from Philadelphia to Sydney (average of $403). Flying from Philadelphia to Sydney in January is currently the most expensive (average of $949). 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.

See more FAQs

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Manly
Coogee

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Top 7 airlines flying from Philadelphia to Sydney

Discover the top 7 airlines that operate flights from Philadelphia to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$535Average$879FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$859Average$885FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$941Average$1,269FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$1,044Average$1,947FlexibilityNo cancel feeOn-time74%
Air New ZealandCheapest$1,220Average$1,548FlexibilityNo cancel feeOn-time78%
Fiji AirwaysCheapest$1,288Average$1,531FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$1,350Average$1,714FlexibilityNo cancel feeOn-time71%

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