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

Return flights

02 Dec - 09 Dec	Scandinavian Airlines
01 Dec - 08 Dec	Delta
05 Dec - 12 Dec	Scandinavian Airlines
08 Dec - 16 Dec	KLM
09 Dec - 16 Dec	KLM
03 Dec - 10 Dec	Delta
15 Dec - 18 Jan	WestJet
15 Dec - 29 Dec	WestJet
15 Dec - 22 Dec	Delta
10 Dec - 19 Dec	Delta
24 Dec - 06 Jan	Porter Airlines (Canada) Ltd
25 Dec - 05 Jan	Porter Airlines (Canada) Ltd
25 Dec - 01 Jan	Porter Airlines (Canada) Ltd
25 Dec - 04 Jan	Air Transat
21 Dec - 05 Jan	Icelandair
26 Dec - 04 Jan	Icelandair
20 Dec - 06 Jan	Air Transat
24 Dec - 03 Jan	Porter Airlines (Canada) Ltd
26 Dec - 02 Jan	WestJet

Also check the deals for one-way flights from Toronto 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 Toronto to Helsinki in December from 527€

Return flights