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

Return flights

17 May - 01 Jun	Air Canada
12 May - 06 Jun	Air Canada
20 May - 03 Jun	Air Canada
22 May - 29 May	Air Canada
30 May - 10 Jun	jetBlue
21 May - 28 May	SWISS
23 May - 30 May	Air Canada
20 May - 13 Jun	Air Canada
19 May - 13 Jun	United
19 May - 06 Jun	Air Canada
25 May - 20 Jun	Air Canada
16 May - 23 May	TAP
26 May - 20 Jun	Air Canada
03 May - 10 May	Icelandair
26 May - 20 Jun	Aer Lingus	direct
21 May - 28 May	Brussels Airlines	direct
22 May - 29 May	Brussels Airlines	direct
23 May - 30 May	Brussels Airlines	direct
16 May - 23 May	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 496€

Return flights