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

Return flights

04 May - 11 May	Air France
06 May - 13 May	Air France
06 May - 11 May	Air France
17 May - 27 May	Delta
04 May - 26 May	Delta
17 May - 28 May	Air France
22 May - 28 May	Air France
23 May - 28 May	Air France
20 May - 28 May	Air France
16 May - 28 May	Air France
25 May - 01 Jun	TAP	direct
27 May - 03 Jun	TAP	direct
28 May - 04 Jun	Air Transat
31 May - 08 Jun	TAP	direct
27 May - 07 Jun	TAP	direct
20 May - 04 Jun	TAP	direct
28 May - 04 Jun	Air Transat	direct
11 May - 29 Jun	Air Transat
30 May - 05 Jun	Air Transat	direct
21 May - 04 Jun	Air Transat	direct

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 377€

Return flights