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

Return flights

25 Aug - 08 Sep	Turkish Airlines
27 Aug - 03 Sep	Turkish Airlines
31 Aug - 04 Sep	Icelandair
18 Aug - 28 Aug	TAP
19 Aug - 02 Sep	Turkish Airlines
19 Aug - 26 Aug	Delta
17 Aug - 21 Aug	Scandinavian Airlines
30 Aug - 08 Sep	Frontier Airlines
22 Aug - 05 Sep	Turkish Airlines
23 Aug - 06 Sep	TAP
22 Aug - 13 Sep	TAP
23 Aug - 13 Sep	Spirit Airlines
29 Aug - 12 Sep	LOT
20 Aug - 26 Aug	SWISS	direct
19 Aug - 26 Aug	SWISS	direct
18 Aug - 28 Aug	SWISS	direct
17 Aug - 21 Aug	Brussels Airlines	direct

Also check the deals for one-way flights from Chicago to Zurich 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 Chicago to Zurich in August from 517€

Return flights