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

Return flights

06 Dec - 16 Dec	Delta
08 Dec - 12 Dec	Delta
05 Dec - 16 Dec	Delta
05 Dec - 15 Dec	WestJet
24 Dec - 17 Jan	Porter Airlines (Canada) Ltd
10 Dec - 21 Dec	Icelandair
10 Dec - 13 Dec	SWISS
12 Dec - 23 Dec	Air Transat
11 Dec - 21 Dec	Porter Airlines (Canada) Ltd
10 Dec - 20 Dec	WestJet
11 Dec - 20 Dec	Porter Airlines (Canada) Ltd
24 Dec - 05 Jan	Porter Airlines (Canada) Ltd
23 Dec - 03 Jan	Porter Airlines (Canada) Ltd
19 Dec - 03 Jan	Air Transat
24 Dec - 03 Jan	TAP

Also check the deals for one-way flights from Toronto to Oslo 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 Oslo in December from $633

Return flights