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$5,249+ Cheap flights from Islip, NY (ISP) to Sydney (SYD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/28. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SYD
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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Find flight deals from Islip to Sydney

Cheapest flights from Islip to Sydney
Explore the most affordable flight options available from Islip to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 13, 2025.

This Trip.com deal was found by Cheapflights users on 11/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:15 amISP - SYD
2 stops32h 40mMultiple Airlines
Sun 1/42:05 pmSYD - ISP
2 stops25h 54mMultiple Airlines
Deal found 11/13$5,249
This oojo deal was found by Cheapflights users on 11/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2612:40 pmISP - SYD
2 stops40h 10mMultiple Airlines
Fri 1/211:05 amSYD - ISP
2 stops39h 59mMultiple Airlines
Deal found 11/11$10,583

Cheap flight deals from Islip to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) 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 November 13, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$10,583
(oojo)

Popular in

December

Cheapest in

February

Average price

$1,325
Provider with most accurate pricing for Islip Long Island-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Islip Long Island-Sydney Kingsford Smith flights.
Search Deals
From Islip Long Island to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($261 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($60 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip 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 November 13, 2025.
Use the filters below to find and compare flights from Islip to Sydney that are best for you.

Fly from

Islip

Fly to

Sydney

Route

Depart

Return

Price

IslipSydney

ISP - SYD

ISPSYD

Islip Long Island

Sun 12/28

6:15 am-6:55 am

2 stops32h 40m

Sydney Kingsford Smith

Sun 1/4

2:05 pm-11:59 pm

2 stops25h 54m

$5,249

IslipSydney

ISP - SYD

ISPSYD

Islip Long Island

Tue 1/20

12:30 pm-8:50 pm

2 stops40h 20m

Sydney Kingsford Smith

Thu 1/29

11:05 am-11:05 am

2 stops40h 00m

$10,583

IslipSydney

ISP - SYD

ISPSYD

Islip Long Island

Fri 12/26

12:40 pm-8:50 pm

2 stops40h 10m

Sydney Kingsford Smith

Fri 1/2

11:05 am-11:04 am

2 stops39h 59m

$10,583

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/13

  • Most accurate provider: When it comes to deals on Islip, New York-Sydney flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Sydney flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-Sydney flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-Sydney flights, Cheapflights users trust FlightHub the most. FlightHub 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 Islip, New York-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 Islip to Sydney

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

What is the cheapest month to book a flight from Islip, New York to Sydney?

Currently, August is the cheapest month in which you can book a flight from Islip, New York to Sydney (average of $403). Flying from Islip, New York to Sydney in July is currently the most expensive (average of $1,007). 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.

Related info for your journey

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

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Islip 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 Islip, New York to Sydney?

    Currently, August is the cheapest month in which you can book a flight from Islip, New York to Sydney (average of $403). Flying from Islip, New York to Sydney in July is currently the most expensive (average of $1,007). 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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