Cheapest return flights from Chicago to Frankfurt in September from $511

Best time to book flights for Chicago (ORD) to Frankfurt (FRA) flights at AirHint

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

Return flights

22 Sep - 06 Oct Scandinavian Airlines
21 Sep - 28 Sep Scandinavian Airlines
25 Sep - 09 Oct Turkish Airlines
20 Sep - 28 Sep Scandinavian Airlines
23 Sep - 07 Oct Turkish Airlines
09 Sep - 10 Sep Condor
09 Sep - 18 Sep Turkish Airlines
09 Sep - 18 Sep Lufthansa direct
03 Sep - 10 Sep Lufthansa direct
13 Sep - 20 Sep Icelandair
23 Sep - 07 Oct Lufthansa direct
23 Sep - 30 Sep Lufthansa direct
08 Sep - 15 Sep Lufthansa direct
21 Sep - 28 Sep Lufthansa direct
22 Sep - 06 Oct Lufthansa direct
25 Sep - 09 Oct United direct
27 Sep - 04 Oct United

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.

Book a cheap hotel in Frankfurt

Cheap car rent in Frankfurt