Cheapest one-way flights from Chicago to Frankfurt in September from $243

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

One-Way flights

24 Sep Frontier Airlines
27 Sep Spirit Airlines
22 Sep Spirit Airlines
30 Sep Spirit Airlines
28 Sep TAP
26 Sep TAP
25 Sep Spirit Airlines
17 Sep Frontier Airlines
19 Sep Frontier Airlines
20 Sep Spirit Airlines

Also check the deals for return 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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