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

Return flights

01 May - 08 May	TAP
01 May - 10 May	TAP
09 May - 19 May	TAP
15 May - 22 May	TAP
01 May - 23 May	TAP
13 May - 22 May	TAP
02 May - 23 May	TAP
15 May - 06 Jun	TAP
01 May - 08 May	Aer Lingus	direct
13 May - 22 May	Aer Lingus	direct
08 May - 30 May	TAP
12 May - 06 Jun	Air Canada
11 May - 06 Jun	Air Canada
11 May - 06 Jun	Aer Lingus	direct
12 May - 06 Jun	Aer Lingus	direct
20 May - 13 Jun	Air Canada
19 May - 13 Jun	United
19 May - 13 Jun	Aer Lingus	direct
20 May - 13 Jun	Aer Lingus	direct
27 May - 28 Jun	Air Canada

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 375€

Return flights