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

Return flights

08 May - 12 May	Finnair
03 May - 12 May	Finnair
16 May - 23 May	Finnair
03 May - 20 May	Finnair
15 May - 23 May	Finnair
08 May - 15 May	Finnair
10 May - 19 May	Finnair
08 May - 18 May	Finnair
15 May - 19 May	Finnair
03 May - 13 May	Finnair
24 May - 07 Jun	Air Transat	direct
24 May - 02 Jun	Air Transat	direct
28 May - 14 Jun	Air Transat
31 May - 09 Jun	Air Transat	direct
20 May - 13 Jun	Azores Airlines
24 May - 06 Jun	Royal Air Maroc
15 May - 06 Jun	Royal Air Maroc
28 May - 14 Jun	TAP	direct
12 May - 06 Jun	Azores Airlines
21 May - 03 Jun	Air Transat

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Cheapest return flights from Toronto to Lisbon in May from $276

Return flights