AirHint found the following cheapest return flights from Toronto (YTZ) to Lisbon (LIS) in December 2025 (see full year).

Return flights

05 Dec - 11 Dec	Air Transat
08 Dec - 22 Dec	Air Transat
19 Dec - 30 Dec	Air Transat
29 Dec - 03 Jan	Air Transat
26 Dec - 10 Jan	Air Transat
27 Dec - 03 Jan	Porter Airlines (Canada) Ltd
21 Dec - 03 Jan	Air Transat
22 Dec - 03 Jan	Air Transat
02 Dec - 10 Dec	SWISS
18 Dec - 05 Jan	Air Transat
04 Dec - 10 Dec	SWISS
01 Dec - 10 Dec	SWISS
06 Dec - 16 Dec	SWISS
01 Dec - 08 Dec	SWISS
08 Dec - 15 Dec	SWISS
07 Dec - 14 Dec	SWISS
23 Dec - 03 Jan	Air Canada
14 Dec - 01 Jan	SWISS
30 Dec - 06 Jan	SWISS
20 Dec - 01 Jan	Air Canada

Also check the deals for one-way flights from Toronto to Lisbon 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 Lisbon in December from $578

Return flights