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

Return flights

20 Sep - 23 Sep	SKY express
20 Sep - 30 Sep	SKY express
27 Sep - 30 Sep	SKY express
13 Sep - 23 Sep	SKY express
13 Sep - 16 Sep	SKY express
13 Sep - 30 Sep	SKY express
11 Sep - 23 Sep	SKY express
11 Sep - 16 Sep	SKY express
11 Sep - 30 Sep	SKY express
20 Sep - 09 Oct	SKY express
20 Sep - 02 Oct	SKY express
27 Sep - 09 Oct	SKY express
27 Sep - 02 Oct	SKY express
13 Sep - 02 Oct	SKY express
11 Sep - 02 Oct	SKY express
06 Sep - 16 Sep	SKY express
27 Sep - 16 Oct	SKY express
30 Sep - 09 Oct	SKY express
30 Sep - 02 Oct	SKY express
20 Sep - 05 Oct	SKY express

Also check the deals for one-way flights from Lisbon to Istanbul in September.

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 September from $172

Return flights