Cheapest return flights from Istanbul to Helsinki in September from 126€

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

Return flights

15 Sep - 17 Sep Pegasus Airlines
03 Sep - 12 Sep Pegasus Airlines direct
15 Sep - 17 Sep Pegasus Airlines direct
12 Sep - 19 Sep Pegasus Airlines direct
08 Sep - 12 Sep Pegasus Airlines direct
08 Sep - 13 Sep Pegasus Airlines direct
06 Sep - 10 Sep Pegasus Airlines direct
12 Sep - 14 Sep Pegasus Airlines direct
13 Sep - 19 Sep Pegasus Airlines direct
03 Sep - 09 Sep Pegasus Airlines
27 Sep - 02 Oct Pegasus Airlines
29 Sep - 06 Oct Pegasus Airlines
27 Sep - 02 Oct Pegasus Airlines direct
29 Sep - 06 Oct Pegasus Airlines direct

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

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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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