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

Return flights

16 Sep - 20 Sep	SKY express
30 Sep - 04 Oct	SKY express
30 Sep - 16 Oct	SKY express
30 Sep - 18 Oct	SKY express
16 Sep - 04 Oct	SKY express
25 Sep - 04 Oct	SKY express
23 Sep - 04 Oct	SKY express
18 Sep - 20 Sep	SKY express
09 Sep - 20 Sep	SKY express
02 Sep - 20 Sep	SKY express
30 Sep - 02 Oct	SKY express
30 Sep - 14 Oct	SKY express
16 Sep - 02 Oct	SKY express
10 Sep - 20 Sep	Vueling Airlines
08 Sep - 20 Sep	Vueling Airlines
30 Sep - 08 Oct	SKY express
09 Sep - 11 Sep	SKY express
09 Sep - 13 Sep	SKY express
02 Sep - 11 Sep	SKY express
02 Sep - 04 Sep	SKY express

Also check the deals for one-way flights from Istanbul to Lisbon 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 Istanbul to Lisbon in September from $192

Return flights