Cheapest return flights from Chicago to Frankfurt in September from 576€

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

Return flights

26 Sep - 06 Oct Frontier Airlines
30 Sep - 25 Oct Spirit Airlines
22 Sep - 26 Sep Frontier Airlines
27 Sep - 04 Oct Spirit Airlines
18 Sep - 25 Sep Condor
21 Sep - 09 Oct Frontier Airlines
25 Sep - 18 Oct Frontier Airlines
20 Sep - 11 Oct Frontier Airlines
16 Sep - 23 Sep Spirit Airlines
22 Sep - 30 Sep TAP
17 Sep - 24 Sep Spirit Airlines
23 Sep - 18 Oct Spirit Airlines
16 Sep - 30 Sep Spirit Airlines
19 Sep - 11 Oct Frontier Airlines
16 Sep - 11 Oct Frontier Airlines
18 Sep - 11 Oct Spirit Airlines
25 Sep - 29 Sep TAP
22 Sep - 26 Sep Lufthansa direct
17 Sep - 24 Sep Lufthansa direct
16 Sep - 23 Sep Lufthansa direct

Also check the deals for one-way flights from Chicago to Frankfurt in September.

Skyscanner

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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