AirHint found the following cheapest return flights from Toronto (YTZ) to Lisbon (LIS) in September 2026 (see full year).

Return flights

21 Sep - 28 Sep	Air Transat
21 Sep - 29 Sep	Air Transat
21 Sep - 30 Sep	Air Transat
01 Sep - 16 Sep	Air Transat
01 Sep - 22 Sep	Air Transat
08 Sep - 17 Sep	Air Transat
08 Sep - 22 Sep	Air Transat
21 Sep - 01 Oct	Air Transat
19 Sep - 01 Oct	Air Transat
20 Sep - 01 Oct	Air Transat
27 Sep - 05 Oct	Air Transat
13 Sep - 22 Sep	Air Transat
11 Sep - 24 Sep	Air Transat
11 Sep - 21 Sep	Air Transat
25 Sep - 07 Oct	Air Transat
25 Sep - 01 Oct	Air Transat
30 Sep - 21 Oct	Air Transat
20 Sep - 06 Oct	Air Transat
27 Sep - 06 Oct	Air Transat

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

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 September from $624

Return flights