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

Return flights

03 May - 17 May	TAP
16 May - 20 May	Scandinavian Airlines
11 May - 21 May	Scandinavian Airlines
05 May - 12 May	Icelandair
22 May - 05 Jun	TAP
02 May - 09 May	Icelandair
19 May - 02 Jun	Scandinavian Airlines
07 May - 16 May	Scandinavian Airlines
05 May - 12 May	Lufthansa	direct
02 May - 09 May	Lufthansa	direct
12 May - 19 May	Icelandair
11 May - 21 May	United	direct
19 May - 02 Jun	Lufthansa	direct
22 May - 05 Jun	United	direct

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

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 May from 605€

Return flights