Cheapest one-way MDW–HEL flights, May

AirHint found the following cheapest one-way flights from Chicago (MDW) to Helsinki (HEL) in May 2026 (see full year).

One-Way flights

12 May Frontier Airlines
13 May Frontier Airlines
19 May Porter Airlines (Canada) Ltd
17 May Porter Airlines (Canada) Ltd
16 May Frontier Airlines
03 May Frontier Airlines
14 May Frontier Airlines
18 May Porter Airlines (Canada) Ltd
20 May Porter Airlines (Canada) Ltd
01 May KLM

Also check the deals for return flights from Chicago to Helsinki in May.

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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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