Cheapest return ORD–DUB flights, May

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

Return flights

25 May - 15 Jun WestJet
28 May - 08 Jun Frontier Airlines
30 May - 08 Jun Icelandair
23 May - 28 May jetBlue
23 May - 27 May jetBlue
28 May - 02 Jun SWISS
27 May - 01 Jun Air Canada
22 May - 27 May KLM
28 May - 09 Jun Frontier Airlines
24 May - 07 Jun Finnair direct
12 May - 27 May Volaris
30 May - 07 Jun Icelandair
24 May - 29 May WestJet
26 May - 31 May Delta
19 May - 03 Jun United
27 May - 31 May United
28 May - 01 Jun Air Canada
23 May - 29 May WestJet
13 May - 20 May Finnair
12 May - 20 May Finnair

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

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