Cheapest return flights from Istanbul to Helsinki in September from $154

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

Return flights

07 Sep - 13 Sep Pegasus Airlines direct
26 Sep - 04 Oct Pegasus Airlines direct
16 Sep - 23 Sep Pegasus Airlines
26 Sep - 29 Sep Pegasus Airlines direct
10 Sep - 16 Sep Pegasus Airlines direct
22 Sep - 23 Oct AJet
27 Sep - 04 Oct Pegasus Airlines direct
27 Sep - 02 Oct Pegasus Airlines
11 Sep - 20 Sep Pegasus Airlines direct
11 Sep - 17 Sep Pegasus Airlines direct
10 Sep - 10 Sep Pegasus Airlines direct
17 Sep - 18 Sep Pegasus Airlines
08 Sep - 20 Sep Pegasus Airlines direct
09 Sep - 10 Sep Pegasus Airlines direct
30 Sep - 01 Oct AJet
30 Sep - 02 Oct AJet
29 Sep - 03 Oct AJet
29 Sep - 01 Oct AJet
29 Sep - 02 Oct AJet
27 Sep - 03 Oct Pegasus Airlines

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

Skyscanner

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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