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

Return flights

24 Sep - 30 Sep	Pegasus Airlines
16 Sep - 23 Sep	Pegasus Airlines
16 Sep - 25 Sep	Pegasus Airlines
23 Sep - 30 Sep	Pegasus Airlines
30 Sep - 07 Oct	Pegasus Airlines
15 Sep - 18 Sep	AJet
18 Sep - 23 Sep	Pegasus Airlines
09 Sep - 12 Sep	Pegasus Airlines
16 Sep - 18 Sep	Pegasus Airlines
27 Sep - 30 Sep	Pegasus Airlines
17 Sep - 24 Sep	AJet
30 Sep - 04 Oct	Pegasus Airlines
30 Sep - 03 Oct	Pegasus Airlines
30 Sep - 05 Oct	Pegasus Airlines
29 Sep - 04 Oct	Pegasus Airlines
29 Sep - 24 Oct	Pegasus Airlines
16 Sep - 04 Oct	Wizz Air UK
15 Sep - 08 Oct	Pegasus Airlines
26 Sep - 01 Oct	AJet
27 Sep - 05 Oct	AJet

Also check the deals for one-way flights from Istanbul to Barcelona 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 Barcelona in September from 118€

Return flights