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

Return flights

24 Aug - 30 Aug	Icelandair
22 Aug - 30 Aug	Icelandair
24 Aug - 07 Sep	Icelandair
13 Aug - 20 Aug	Icelandair
24 Aug - 31 Aug	TAP
28 Aug - 31 Aug	Icelandair
27 Aug - 10 Sep	British Airways
08 Aug - 15 Aug	Icelandair
18 Aug - 31 Aug	British Airways
22 Aug - 24 Aug	Aer Lingus
19 Aug - 26 Aug	Aer Lingus
27 Aug - 08 Sep	United
11 Aug - 18 Aug	United
29 Aug - 03 Sep	United
24 Aug - 07 Sep	SWISS	direct

Also check the deals for one-way flights from Zurich 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 Zurich to Chicago in August from 383€

Return flights