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

Return flights

08 Oct - 15 Oct	Air Transat
06 Oct - 16 Oct	Air Transat
05 Oct - 15 Oct	Air Transat
11 Oct - 15 Oct	Air Transat
11 Oct - 14 Oct	Air Transat
14 Oct - 21 Oct	Air Transat
01 Oct - 21 Oct	Air Transat
01 Oct - 08 Oct	Air Transat
07 Oct - 23 Oct	Air Transat
08 Oct - 22 Oct	Air Transat
27 Oct - 06 Nov	Air Transat
31 Oct - 18 Nov	Air Transat
30 Oct - 08 Nov	Air Transat
31 Oct - 08 Nov	Air Transat
25 Oct - 08 Nov	Air Transat
22 Oct - 22 Nov	Air Transat
26 Oct - 29 Nov	Air Transat
03 Oct - 24 Nov	Air Transat
27 Oct - 01 Nov	Air Transat
28 Oct - 08 Nov	Air Canada

Also check the deals for one-way flights from Toronto to Lisbon in October.

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 October from $449

Return flights