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

Return flights

02 Dec - 11 Dec	Air Transat
03 Dec - 11 Dec	Air Transat
05 Dec - 15 Dec	Air Transat
04 Dec - 15 Dec	Air Transat
12 Dec - 22 Dec	Air Transat
05 Dec - 16 Dec	Air Transat
11 Dec - 10 Jan	Air Transat
14 Dec - 30 Dec	Air Transat
12 Dec - 29 Dec	Air Transat
29 Dec - 24 Jan	Air Transat
28 Dec - 10 Jan	Air Transat
29 Dec - 10 Jan	Air Transat
05 Dec - 27 Dec	Air Transat
03 Dec - 27 Dec	Air Transat
22 Dec - 17 Jan	Air Transat
21 Dec - 10 Jan	Air Transat
15 Dec - 05 Jan	Air Transat
15 Dec - 06 Jan	Air Transat
02 Dec - 06 Jan	Air Transat
31 Dec - 10 Jan	Porter Airlines (Canada) Ltd

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 355€

Return flights