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

Return flights

16 Jan - 30 Jan	TAP
13 Jan - 20 Jan	Icelandair
23 Jan - 30 Jan	Icelandair
13 Jan - 27 Jan	Icelandair
13 Jan - 20 Jan	Aer Lingus	direct
13 Jan - 27 Jan	Aer Lingus	direct
14 Jan - 26 Jan	SWISS
23 Jan - 30 Jan	Aer Lingus	direct
16 Jan - 30 Jan	Aer Lingus	direct
14 Jan - 26 Jan	Aer Lingus	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 364€

Return flights