AirHint found the following cheapest return flights from Istanbul (IST) to Helsinki (HEL) in May 2026 (see full year).

Return flights

20 May - 27 May	airBaltic
24 May - 27 May	airBaltic
24 May - 28 May	airBaltic
27 May - 31 May	airBaltic
17 May - 21 May	airBaltic
01 May - 05 May	airBaltic
12 May - 16 May	Lufthansa
19 May - 23 May	Lufthansa
01 May - 05 May	Turkish Airlines	direct
26 May - 30 May	Turkish Airlines

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

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 May from $194

Return flights