Cheapest return ORD–FRA flights, September

AirHint found the following cheapest return flights from Chicago (ORD) to Frankfurt (FRA) in September 2026 (see full year).

Return flights

15 Sep - 29 Sep Turkish Airlines
02 Sep - 09 Sep Turkish Airlines
14 Sep - 05 Oct Turkish Airlines
18 Sep - 02 Oct Turkish Airlines
04 Sep - 18 Sep Turkish Airlines
15 Sep - 23 Sep Aer Lingus
29 Sep - 06 Oct Icelandair
04 Sep - 11 Sep Icelandair
17 Sep - 29 Sep Aer Lingus
24 Sep - 01 Oct Icelandair
14 Sep - 21 Sep Icelandair
17 Sep - 27 Sep Delta
19 Sep - 26 Sep Icelandair
15 Sep - 29 Sep Lufthansa direct
29 Sep - 06 Oct Lufthansa direct
14 Sep - 05 Oct Lufthansa direct
18 Sep - 02 Oct Lufthansa direct
24 Sep - 01 Oct Lufthansa direct

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

Powered by

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.

Book a cheap hotel in Frankfurt

Cheap car rent in Frankfurt

Feel free to contact us with any feedback or request another flight research.