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

Return flights

26 Sep - 29 Sep	Wizz Air UK
24 Sep - 05 Oct	Wizz Air UK
19 Sep - 22 Sep	Wizz Air UK
15 Sep - 24 Sep	Pegasus Airlines
24 Sep - 26 Sep	Wizz Air UK
07 Sep - 11 Sep	Pegasus Airlines
26 Sep - 30 Sep	Wizz Air UK
22 Sep - 28 Sep	Pegasus Airlines
17 Sep - 21 Sep	Pegasus Airlines
11 Sep - 14 Sep	Pegasus Airlines
08 Sep - 14 Sep	Pegasus Airlines
24 Sep - 05 Oct	Turkish Airlines	direct

Also check the deals for one-way flights from Istanbul to Tallinn 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 Tallinn in September from 148€

Return flights