AirHint found the following cheapest return flights from Chicago (MDW) to Dublin (DUB) in August 2025 (see full year).

Return flights

13 Aug - 20 Aug	Air France
11 Aug - 20 Aug	Air France
18 Aug - 26 Aug	Delta
17 Aug - 26 Aug	Delta
22 Aug - 01 Sep	KLM
18 Aug - 25 Aug	Air France
03 Aug - 12 Aug	KLM
30 Aug - 14 Sep	Porter Airlines (Canada) Ltd
02 Aug - 13 Aug	Air France
08 Aug - 16 Aug	Frontier Airlines
10 Aug - 19 Aug	Delta
11 Aug - 18 Aug	Air France

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

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 August from 431€

Return flights