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

Return flights

06 May - 10 May	SKY express
06 May - 08 May	SKY express
01 May - 10 May	SKY express
01 May - 08 May	SKY express
13 May - 20 May	SKY express
13 May - 24 May	SKY express
13 May - 31 May	SKY express
13 May - 17 May	SKY express
06 May - 20 May	SKY express
06 May - 24 May	SKY express
13 May - 01 Jun	SKY express
27 May - 01 Jun	SKY express
20 May - 01 Jun	SKY express
27 May - 03 Jun	SKY express
20 May - 03 Jun	SKY express
27 May - 08 Jun	SKY express
20 May - 08 Jun	SKY express
27 May - 04 Jun	SKY express
20 May - 04 Jun	SKY express
19 May - 01 Jun	Vueling Airlines

Also check the deals for one-way flights from Istanbul 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 Istanbul to Lisbon in May from 158€

Return flights