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

Return flights

03 May - 06 May	Pegasus Airlines
08 May - 10 May	Pegasus Airlines	direct
03 May - 06 May	Pegasus Airlines	direct
27 May - 31 May	airBaltic
14 May - 19 May	KLM
26 May - 30 May	AJet
23 May - 24 May	KLM
16 May - 30 May	Wizz Air UK
16 May - 20 May	Pegasus Airlines	direct
16 May - 19 May	Pegasus Airlines	direct
26 May - 02 Jun	Pegasus Airlines
26 May - 02 Jun	Pegasus Airlines	direct

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 153€

Return flights