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

Return flights

05 Aug - 19 Aug	Icelandair
26 Aug - 01 Sep	Icelandair
13 Aug - 17 Aug	Icelandair
12 Aug - 17 Aug	Icelandair
21 Aug - 26 Aug	Icelandair
18 Aug - 25 Aug	Icelandair
19 Aug - 29 Aug	Scandinavian Airlines
03 Aug - 19 Aug	British Airways
12 Aug - 19 Aug	United	direct
05 Aug - 19 Aug	United	direct
07 Aug - 14 Aug	Icelandair
31 Aug - 08 Sep	Icelandair
19 Aug - 02 Sep	Lufthansa	direct
27 Aug - 03 Sep	United	direct
30 Aug - 06 Sep	Icelandair
26 Aug - 01 Sep	Lufthansa	direct
31 Aug - 08 Sep	Lufthansa	direct
30 Aug - 06 Sep	United	direct

Also check the deals for one-way flights from Chicago to Frankfurt 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 Frankfurt in August from $573

Return flights