Cheapest return flights from Helsinki to Istanbul in September from $165

Best time to book flights for Helsinki (HEL) to Istanbul (IST) flights at AirHint

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

Return flights

10 Sep - 15 Sep Pegasus Airlines direct
08 Sep - 13 Sep Pegasus Airlines direct
08 Sep - 19 Sep Pegasus Airlines direct
24 Sep - 28 Sep airBaltic
10 Sep - 14 Sep Pegasus Airlines direct
10 Sep - 14 Sep airBaltic
01 Sep - 14 Sep airBaltic
01 Sep - 09 Sep Norwegian Air Sweden AOC
01 Sep - 09 Sep Pegasus Airlines direct
24 Sep - 28 Sep Turkish Airlines direct

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