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

Return flights

05 May - 19 May	Scandinavian Airlines
02 May - 16 May	Scandinavian Airlines
14 May - 24 May	Scandinavian Airlines
18 May - 23 May	Scandinavian Airlines
25 May - 04 Jun	Lufthansa
27 May - 30 Jun	Icelandair
05 May - 19 May	SWISS	direct
24 May - 03 Jun	Icelandair
02 May - 16 May	Austrian Airlines	direct
25 May - 04 Jun	Austrian Airlines	direct
18 May - 23 May	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 $591

Return flights