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

Return flights

26 Oct - 26 Nov	Royal Air Maroc
29 Oct - 19 Nov	Royal Air Maroc
29 Oct - 22 Nov	Royal Air Maroc
27 Oct - 13 Nov	KLM
25 Oct - 12 Nov	Delta
25 Oct - 10 Nov	Air France
25 Oct - 05 Nov	Air France
27 Oct - 14 Nov	KLM
27 Oct - 06 Nov	KLM
29 Oct - 12 Nov	Royal Air Maroc
22 Oct - 28 Oct	Air Transat
22 Oct - 30 Oct	Royal Air Maroc
25 Oct - 30 Oct	Delta
21 Oct - 27 Oct	Azores Airlines
23 Oct - 26 Oct	Air Transat
22 Oct - 27 Oct	Air Transat
26 Oct - 30 Oct	TAP
23 Oct - 31 Oct	TAP
24 Oct - 27 Oct	Air Transat
23 Oct - 27 Oct	KLM

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 $455

Return flights