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

Return flights

08 May - 12 May	Air Europa
30 May - 06 Jun	Air Europa
30 May - 03 Jun	Air Europa
29 May - 03 Jun	Air Europa
08 May - 11 May	Air Europa
06 May - 12 May	Air Europa
31 May - 12 Jun	Air Europa
21 May - 30 May	Air Europa
10 May - 17 May	Air Europa
31 May - 09 Jun	Air Europa
08 May - 13 May	Air Europa
08 May - 15 May	SKY express
22 May - 12 Jun	SKY express
22 May - 03 Jun	SKY express
22 May - 10 Jun	SKY express
22 May - 05 Jun	SKY express
08 May - 28 May	SKY express
08 May - 18 May	SKY express
22 May - 28 May	SKY express
31 May - 19 Jun	Air Europa

Also check the deals for one-way flights from Lisbon to Istanbul 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 Lisbon to Istanbul in May from $131

Return flights