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

Return flights

02 Dec - 09 Dec	Iberia
03 Dec - 07 Dec	Iberia
05 Dec - 09 Dec	Royal Air Maroc
02 Dec - 27 Dec	Iberia
04 Dec - 27 Dec	British Airways
02 Dec - 11 Dec	Air Transat
04 Dec - 11 Dec	Air Transat
12 Dec - 19 Dec	Air Transat
10 Dec - 17 Dec	Air Transat
03 Dec - 12 Dec	Air Transat
25 Dec - 17 Jan	British Airways
16 Dec - 10 Jan	Air Transat
05 Dec - 07 Jan	TAP	direct
13 Dec - 07 Jan	TAP	direct
14 Dec - 07 Jan	TAP	direct
30 Dec - 10 Jan	British Airways
29 Dec - 24 Jan	Virgin Atlantic
04 Dec - 06 Jan	TAP	direct
28 Dec - 08 Jan	British Airways
29 Dec - 05 Jan	British Airways

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 $305

Return flights