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

Return flights

14 May - 19 May	Icelandair
06 May - 26 May	Icelandair
13 May - 22 May	Icelandair
13 May - 25 May	Icelandair
06 May - 27 May	Icelandair
13 May - 20 May	Icelandair
12 May - 27 May	Icelandair
11 May - 18 May	Scandinavian Airlines
04 May - 11 May	Scandinavian Airlines
05 May - 26 May	Scandinavian Airlines
05 May - 02 Jun	Turkish Airlines
05 May - 02 Jun	Finnair	direct
29 May - 05 Jun	Scandinavian Airlines

Also check the deals for one-way flights from Chicago 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 Chicago to Helsinki in May from $374

Return flights