Cheapest one-way flights from Islip to Sydney in January from 866€

AirHint found the following cheapest one-way flights from Islip (ISP) to Sydney (SYD) in January 2026 (see full year).

One-Way flights

15 Jan Frontier Airlines

Also check the deals for return flights from Islip to Sydney in January.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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