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

Return flights

08 May - 15 May	Scandinavian Airlines
15 May - 22 May	Scandinavian Airlines
03 May - 23 May	TAP
29 May - 12 Jun	TAP
23 May - 06 Jun	TAP
28 May - 06 Jun	jetBlue
26 May - 09 Jun	Scandinavian Airlines
08 May - 15 May	Aer Lingus	direct
03 May - 23 May	Aer Lingus	direct
15 May - 22 May	Aer Lingus	direct
23 May - 06 Jun	Aer Lingus	direct
26 May - 09 Jun	Brussels Airlines	direct

Also check the deals for one-way flights from Chicago to Dublin 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 Dublin in May from 337€

Return flights