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

Return flights

08 Dec - 14 Dec	SWISS
02 Dec - 09 Dec	Finnair
02 Dec - 08 Dec	Finnair
03 Dec - 10 Dec	Royal Air Maroc
08 Dec - 14 Dec	TAP	direct
01 Dec - 05 Dec	Air Transat
04 Dec - 10 Dec	Air Transat	direct
10 Dec - 17 Dec	Air Transat
09 Dec - 16 Dec	Air Transat
08 Dec - 15 Dec	Air Transat
06 Dec - 17 Jan	Air Transat
13 Dec - 10 Jan	Air Transat
08 Dec - 06 Jan	Air Transat
08 Dec - 05 Jan	Air Transat
29 Dec - 08 Jan	Air Canada
06 Dec - 17 Jan	TAP	direct
12 Dec - 01 Jan	Azores Airlines
25 Dec - 06 Jan	Air Transat
22 Dec - 06 Jan	TAP	direct
29 Dec - 08 Jan	TAP	direct

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 299€

Return flights