AirHint found the following cheapest return flights from Vienna (VIE) to Chicago (ORD) in August 2025 (see full year).

Return flights

06 Aug - 12 Aug	British Airways
16 Aug - 21 Aug	British Airways
11 Aug - 21 Aug	British Airways
08 Aug - 15 Aug	British Airways
13 Aug - 10 Sep	Aer Lingus
08 Aug - 17 Aug	British Airways
08 Aug - 21 Aug	British Airways
08 Aug - 24 Aug	British Airways
28 Aug - 11 Sep	Aer Lingus
07 Aug - 21 Aug	British Airways
07 Aug - 14 Aug	British Airways
10 Aug - 21 Aug	Finnair
30 Aug - 01 Sep	American Airlines
26 Aug - 07 Sep	Iberia
26 Aug - 15 Sep	Iberia
25 Aug - 08 Sep	LOT
22 Aug - 05 Sep	British Airways
14 Aug - 09 Sep	Austrian Airlines
14 Aug - 11 Sep	KLM

Also check the deals for one-way flights from Vienna to Chicago in August.

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 Vienna to Chicago in August from $541

Return flights