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

Return flights

01 Dec - 08 Dec	Air France
14 Dec - 12 Jan	AirAsia X
02 Dec - 13 Dec	Etihad Airways
05 Dec - 19 Dec	Finnair
08 Dec - 19 Dec	Finnair
08 Dec - 22 Dec	Finnair
04 Dec - 17 Dec	Finnair
12 Dec - 23 Dec	Turkish Airlines
09 Dec - 20 Dec	Finnair
25 Dec - 20 Jan	Qantas
25 Dec - 22 Jan	Qantas
25 Dec - 31 Jan	Turkish Airlines
29 Dec - 13 Jan	Turkish Airlines
13 Dec - 24 Dec	Finnair
10 Dec - 05 Jan	Finnair
06 Dec - 09 Jan	Finnair
29 Dec - 17 Jan	Qantas
25 Dec - 10 Jan	Finnair
11 Dec - 02 Jan	Finnair
21 Dec - 27 Dec	Finnair

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 $1506

Return flights