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

Return flights

11 May - 20 May	Icelandair
03 May - 15 May	Icelandair
03 May - 12 May	Icelandair
03 May - 10 May	Icelandair
09 May - 16 May	Icelandair
10 May - 17 May	Icelandair
13 May - 05 Jun	TAP
12 May - 27 May	Aer Lingus
06 May - 19 Jun	Turkish Airlines
01 May - 08 May	Icelandair
19 May - 02 Jun	Condor
11 May - 25 May	Aer Lingus
11 May - 18 May	Icelandair
27 May - 11 Jun	Aer Lingus
31 May - 03 Jun	Condor
13 May - 05 Jun	Lufthansa	direct
06 May - 19 Jun	Lufthansa	direct
19 May - 02 Jun	Lufthansa	direct
26 May - 02 Jun	jetBlue
26 May - 02 Jun	Lufthansa	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 449€

Return flights