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

Return flights

06 May - 13 May	Air France
05 May - 13 May	KLM
05 May - 19 May	KLM
10 May - 17 May	KLM
11 May - 18 May	KLM
20 May - 27 May	KLM
19 May - 26 May	KLM
14 May - 21 May	KLM
15 May - 22 May	Delta
26 May - 02 Jun	KLM
27 May - 03 Jun	KLM
26 May - 18 Jun	Delta
20 May - 05 Jun	Delta
26 May - 04 Jun	Delta
25 May - 03 Jun	Delta
16 May - 23 May	KLM
28 May - 04 Jun	KLM
29 May - 05 Jun	KLM
25 May - 01 Jun	KLM
31 May - 07 Jun	Delta

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 404€

Return flights