Cheap flights from Sydney to Philadelphia from $839

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 15/10. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — PHL
16 Oct — 23 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Sydney Kingsford Smith to Philadelphia are usually found in February or March, booked 59 days in advance, depart on a Thursday or Friday and return on a Tuesday

Cheap flight deals from Sydney to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from Sydney (SYD) to Philadelphia (PHL). 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 16 September 2025.

Round-trip from

$1,433

One-way from

$839

Popular in

December

Cheapest in

February

Average price

$2,511
6/10-21/10
  • 6/10-21/10
  • 3 total stops
  • 69h 26m total
  • Sydney to Philadelphia
15/10
  • 15/10
  • 3 total stops
  • 38h 21m total
  • Sydney to Philadelphia
Highest demand for flights based on searches. 17% potential increase in price ($644 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease ($129 potential savings vs. average return price).
Average for round-trip flights in September 2025

Find flight deals from Sydney to Philadelphia

Cheapest flights from Sydney to Philadelphia
Explore the most affordable flight options available from Sydney to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2025.

Tue 28/1010:20SYD - PHL
2 stops43h 27mAir Canada
Tue 4/1109:20PHL - SYD
2 stops32h 15mAir Canada
Deal found 13/9$1,489
Thu 30/1014:15SYD - PHL
3 stops31h 00mMultiple Airlines
Thu 6/1112:40PHL - SYD
3 stops32h 20mMultiple Airlines
Deal found 15/9$1,502
Thu 30/1010:20SYD - PHL
3 stops43h 27mAir Canada
Thu 6/1115:30PHL - SYD
2 stops26h 05mAir Canada
Deal found 15/9$1,522
Tue 28/1011:20SYD - PHL
1 stop26h 44mAmerican Airlines
Tue 4/1114:10PHL - SYD
2 stops26h 50mAmerican Airlines
Deal found 13/9$1,579
Wed 29/1011:20SYD - PHL
2 stops26h 05mAmerican Airlines
Wed 5/1114:10PHL - SYD
2 stops26h 50mAmerican Airlines
Deal found 14/9$1,580
Thu 30/1011:20SYD - PHL
1 stop23h 59mAmerican Airlines
Thu 6/1115:55PHL - SYD
1 stop25h 05mAmerican Airlines
Deal found 15/9$1,663
Mon 22/911:50SYD - PHL
2 stops31h 36mAir New Zealand
Thu 23/1008:05PHL - SYD
2 stops35h 30mAir New Zealand
Deal found 13/9$1,805

Cheapflights Fare Finder

 
Customise your flight search to find flights from Sydney to Philadelphia 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 16 September 2025.
Use the filters below to find and compare flights from Sydney to Philadelphia that are best for you.

Fly from

Sydney

Fly to

Philadelphia

Route

Depart

Return

Price

SydneyPhiladelphia

SYD - PHL

SYDPHL

Sydney Kingsford Smith

Fri 6/3

11:20-22:56

2 stops27h 36m

Philadelphia

Tue 10/3

15:30-08:35

2 stops26h 05m

$1,414

SydneyPhiladelphia

SYD - PHL

SYDPHL

Sydney Kingsford Smith

Tue 28/10

10:20-14:47

2 stops43h 27m

Philadelphia

Tue 4/11

09:20-09:35

2 stops32h 15m

$1,489

SydneyPhiladelphia

SYD - PHL

SYDPHL

Sydney Kingsford Smith

Wed 29/10

11:20-20:19

1 stop23h 59m

Philadelphia

Wed 5/11

15:55-09:00

1 stop25h 05m

$1,511

SydneyPhiladelphia

SYD - PHL

SYDPHL

Sydney Kingsford Smith

Thu 30/10

10:20-14:47

2 stops43h 27m

Philadelphia

Thu 6/11

15:30-09:35

2 stops26h 05m

$1,511

SydneyPhiladelphia

SYD - PHL

SYDPHL

Sydney Kingsford Smith

Tue 28/10

11:20-23:04

1 stop26h 44m

Philadelphia

Tue 4/11

14:10-09:00

2 stops26h 50m

$1,579

SydneyPhiladelphia

SYD - PHL

SYDPHL

Sydney Kingsford Smith

Wed 29/10

11:20-22:25

2 stops26h 05m

Philadelphia

Wed 5/11

14:10-09:00

2 stops26h 50m

$1,580

SydneyPhiladelphia

SYD - PHL

SYDPHL

Sydney Kingsford Smith

Mon 9/2

11:15-17:44

1 stop22h 29m

Philadelphia

Sat 28/2

17:05-09:00

1 stop23h 55m

$1,654

SydneyPhiladelphia

SYD - PHL

SYDPHL

Sydney Kingsford Smith

Wed 15/10

17:20-16:41

3 stops38h 21m

$839

SydneyPhiladelphia

SYD - PHL

SYDPHL

Sydney Kingsford Smith

Fri 10/10

10:20-06:15

3 stops34h 55m

$942

SydneyPhiladelphia

SYD - PHL

SYDPHL

Sydney Kingsford Smith

Tue 18/11

11:20-14:47

2 stops43h 27m

$1,142

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 13 results
1
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Best time to book a flight from Sydney to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Sydney 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.

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a return flight from Sydney to Philadelphia. Price data was last updated on 12 September 2025.

The best time to book flights from Sydney to Philadelphia is 59 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Find hourly flight availability from Sydney to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 September 2025.

One of the essential ways to save on airfare from Sydney to Philadelphia is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 29% on airfare.

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated 16 September 2025.
Get a feel of what it's like to fly with Delta, Qantas Airways, andUnited Airlines from Sydney to Philadelphia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
8.0
Very Good

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

Related info for your journey

Find useful and relevant information for your journey from Sydney to Philadelphia. 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 Sydney to Philadelphia?

    Departing from Sydney to Philadelphia will take you 23h 59m. The distance between Sydney and Philadelphia is about 15871 km. Both multi-stop and direct flights can be found to your destination and back.

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

    Delta, at $1,155, was found to be the cheapest airline from Sydney to Philadelphia.Alternate airlines to your destination round-trip include United Airlines and Air Canada. Users have found that Delta is 44% cheaper than the other options available to this destination.

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

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

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

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

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

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

See more FAQs

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Fly from Sydney to Philadelphia on these airlines

Choose from the following airlines for your flight from Sydney to Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on 16 September 2025.

Top 6 airlines flying from Sydney to Philadelphia

Discover the top 6 airlines that operate flights from Sydney to Philadelphia. 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 647,157 searches. Data last updated 16 September 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$1,155Average$1,177FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$1,201Average$2,727FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,450Average$1,750FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air New ZealandCheapest$1,650Average$1,847FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
Qantas AirwaysCheapest$1,703Average$2,755FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
American AirlinesCheapest$1,821Average$2,129FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Sydney to Philadelphia?

Cheapflights makes it easy to find Sydney to Philadelphia flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Sydney to Philadelphia?

Millions of users choose and trust Cheapflights to book the best flight deals from Sydney to Philadelphia for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Sydney to Philadelphia with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Sydney to Philadelphia flexibly with Cheapflights today.

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