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

Return flights

05 Dec - 21 Dec	SWISS
03 Dec - 24 Dec	Iberia
04 Dec - 14 Dec	TAP	direct
02 Dec - 07 Dec	TAP	direct
06 Dec - 13 Dec	TAP	direct
03 Dec - 24 Dec	TAP	direct
07 Dec - 17 Dec	TAP	direct
06 Dec - 17 Dec	TAP	direct
02 Dec - 17 Dec	TAP	direct
09 Dec - 20 Dec	TAP	direct
28 Dec - 07 Jan	TAP	direct
23 Dec - 18 Jan	TAP	direct
28 Dec - 06 Jan	TAP	direct
18 Dec - 23 Jan	Azores Airlines
29 Dec - 02 Jan	Air Transat
23 Dec - 05 Jan	Air Transat
27 Dec - 05 Jan	Air Transat
25 Dec - 08 Jan	Delta
12 Dec - 03 Jan	Air Transat
25 Dec - 01 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 $330

Return flights