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

Return flights

03 May - 13 May	Air Transat
04 May - 12 May	Air Transat
03 May - 11 May	Air Transat
03 May - 07 May	Air Transat
02 May - 14 May	Porter Airlines (Canada) Ltd
25 May - 01 Jun	Air Transat
31 May - 07 Jun	Air Transat
23 May - 30 May	Air Transat
24 May - 31 May	Air Transat
21 May - 31 May	Air Transat
02 May - 07 May	Air Transat
02 May - 18 May	Air Transat
24 May - 07 Jun	SWISS
29 May - 05 Jun	Air Canada
23 May - 07 Jun	SWISS
22 May - 07 Jun	SWISS
28 May - 07 Jun	SWISS

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

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 May from 362€

Return flights