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

Return flights

22 Dec - 22 Jan	KLM
07 Dec - 14 Dec	Aegean Airlines
22 Dec - 13 Jan	Ryanair
22 Dec - 12 Jan	Ryanair
22 Dec - 11 Jan	Ryanair
22 Dec - 10 Jan	Ryanair
18 Dec - 10 Jan	Ryanair
10 Dec - 31 Dec	Ryanair
09 Dec - 31 Dec	Lufthansa
25 Dec - 10 Jan	Lufthansa
15 Dec - 09 Jan	airBaltic
16 Dec - 08 Jan	airBaltic
22 Dec - 06 Jan	KLM
10 Dec - 17 Dec	Finnair
18 Dec - 31 Dec	Ryanair
09 Dec - 18 Dec	Lufthansa
21 Dec - 25 Dec	Ryanair
17 Dec - 19 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 $1191

Return flights