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

Return flights

03 Dec - 10 Dec	Norwegian Air Sweden AOC
10 Dec - 15 Jan	Ryanair
16 Dec - 13 Jan	Finnair
05 Dec - 22 Dec	Turkish Airlines
12 Dec - 30 Dec	Finnair
08 Dec - 22 Dec	Turkish Airlines
06 Dec - 05 Jan	Ryanair
05 Dec - 21 Dec	Turkish Airlines
15 Dec - 08 Jan	Finnair
20 Dec - 19 Jan	Finnair
20 Dec - 18 Jan	Finnair
26 Dec - 11 Jan	airBaltic
01 Dec - 01 Jan	Ryanair
12 Dec - 26 Dec	Finnair
17 Dec - 10 Jan	Finnair
02 Dec - 16 Dec	Qatar Airways
21 Dec - 31 Dec	Finnair
19 Dec - 04 Jan	Ryanair
16 Dec - 31 Dec	Qatar Airways

Also check the deals for one-way flights from Helsinki to Sydney 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 Helsinki to Sydney in December from $1060

Return flights