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

Return flights

04 Dec - 07 Dec	Pegasus Airlines	direct
05 Dec - 08 Dec	Pegasus Airlines	direct
22 Dec - 28 Dec	airBaltic
24 Dec - 28 Dec	airBaltic
15 Dec - 18 Dec	Pegasus Airlines	direct
22 Dec - 28 Dec	Pegasus Airlines	direct

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

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 Helsinki in December from $179

Return flights