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

Return flights

18 Aug - 25 Aug	Aer Lingus	direct
19 Aug - 26 Aug	Air Canada
24 Aug - 31 Aug	Air Canada
17 Aug - 24 Aug	Air Canada
12 Aug - 19 Aug	Air Canada
10 Aug - 20 Aug	Iberia
19 Aug - 26 Aug	Iberia	direct
12 Aug - 19 Aug	Iberia	direct
05 Aug - 19 Aug	Aer Lingus	direct
11 Aug - 18 Aug	Air Canada
28 Aug - 04 Sep	Iberia	direct

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 354€

Return flights