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

Return flights

03 May - 10 May	Icelandair
08 May - 15 May	Icelandair
13 May - 17 May	Icelandair
02 May - 09 May	Icelandair
08 May - 19 May	Icelandair
26 May - 09 Jun	Scandinavian Airlines
29 May - 12 Jun	Air Canada
06 May - 13 May	Icelandair
11 May - 18 May	Icelandair
16 May - 23 May	LOT
01 May - 08 May	Icelandair
26 May - 02 Jun	Icelandair
21 May - 28 May	jetBlue

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 $487

Return flights