AirHint found the following cheapest return flights from Istanbul (IST) to Lisbon (LIS) in September 2025 (see full year).

Return flights

29 Sep - 02 Oct	Pegasus Airlines
23 Sep - 02 Oct	AJet
26 Sep - 07 Oct	Pegasus Airlines
27 Sep - 01 Oct	Pegasus Airlines
28 Sep - 01 Oct	Wizz Air UK
23 Sep - 30 Sep	Pegasus Airlines
23 Sep - 27 Sep	Pegasus Airlines
25 Sep - 30 Sep	Pegasus Airlines
22 Sep - 23 Sep	Pegasus Airlines
26 Sep - 01 Oct	Pegasus Airlines
23 Sep - 29 Sep	AJet
22 Sep - 25 Sep	Pegasus Airlines
23 Sep - 23 Sep	Pegasus Airlines
22 Sep - 03 Oct	Pegasus Airlines
23 Sep - 14 Oct	Pegasus Airlines
24 Sep - 27 Sep	Pegasus Airlines
22 Sep - 24 Sep	AJet
25 Sep - 27 Sep	AJet
25 Sep - 01 Oct	Wizz Air UK
29 Sep - 14 Oct	Fly One

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 193€

Return flights