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

Return flights

06 May - 19 May	Scandinavian Airlines
05 May - 12 May	Icelandair
06 May - 15 May	Scandinavian Airlines
06 May - 21 May	Scandinavian Airlines
11 May - 25 May	Lufthansa
18 May - 25 May	Scandinavian Airlines
07 May - 19 May	Frontier Airlines
05 May - 19 May	Icelandair
17 May - 24 May	Icelandair
02 May - 19 May	Icelandair
25 May - 04 Jun	Aer Lingus
24 May - 03 Jun	Icelandair
25 May - 04 Jun	Austrian Airlines	direct

Also check the deals for one-way flights from Chicago to Vienna 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 Vienna in May from 516€

Return flights