AirHint found the following cheapest one-way flights from Istanbul (SAW) to Helsinki (HEL) in September 2025 (see full year).

One-Way flights

03 Sep	Pegasus Airlines	direct
24 Sep	Pegasus Airlines	direct
06 Sep	Pegasus Airlines	direct
10 Sep	Pegasus Airlines	direct
12 Sep	Pegasus Airlines	direct
08 Sep	Pegasus Airlines	direct
11 Sep	Pegasus Airlines	direct
17 Sep	Pegasus Airlines	direct
15 Sep	AJet
05 Sep	Pegasus Airlines	direct

Also check the deals for return flights from Istanbul to Helsinki 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 one-way flights from Istanbul to Helsinki in September from 78€

One-Way flights