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

Return flights

08 Jan - 15 Jan	Icelandair
18 Jan - 25 Jan	Icelandair
28 Jan - 04 Feb	Icelandair
12 Jan - 19 Jan	Icelandair
20 Jan - 27 Jan	Icelandair
24 Jan - 31 Jan	Icelandair
28 Jan - 04 Feb	Aer Lingus	direct
20 Jan - 27 Jan	Aer Lingus	direct
01 Jan - 10 Jan	Icelandair
18 Jan - 25 Jan	Aer Lingus	direct
12 Jan - 19 Jan	Aer Lingus	direct
08 Jan - 15 Jan	United	direct

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

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 January from 323€

Return flights