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

Return flights

02 May - 23 May	TAP
13 May - 06 Jun	TAP
05 May - 13 May	KLM
09 May - 30 May	TAP
04 May - 11 May	Aer Lingus	direct
11 May - 25 May	British Airways
12 May - 06 Jun	Iberia
07 May - 19 May	Iberia
10 May - 30 May	Iberia
27 May - 04 Jun	Iberia
03 May - 23 May	jetBlue
07 May - 19 May	Aer Lingus	direct
10 May - 30 May	Aer Lingus	direct
12 May - 06 Jun	Aer Lingus	direct
13 May - 06 Jun	Aer Lingus	direct
27 May - 04 Jun	Aer Lingus	direct
20 May - 13 Jun	TAP
27 May - 20 Jun	Air Canada
19 May - 13 Jun	Aer Lingus	direct
29 May - 05 Jun	Aer Lingus	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 $468

Return flights