AirHint found the following cheapest return flights from Sydney (SYD) to Helsinki (HEL) in December 2025 (see full year).

Return flights

05 Dec - 17 Dec	Turkish Airlines
15 Dec - 10 Jan	Finnair
20 Dec - 08 Jan	Turkish Airlines
06 Dec - 07 Jan	Turkish Airlines
22 Dec - 21 Jan	Finnair
22 Dec - 07 Jan	Finnair
17 Dec - 04 Jan	Turkish Airlines
20 Dec - 07 Jan	Turkish Airlines

Also check the deals for one-way flights from Sydney to Helsinki in December.

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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Cheapest return flights from Sydney to Helsinki in December from 1455€

Return flights