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

Return flights

05 Mar - 15 Mar	Scandinavian Airlines
07 Mar - 15 Mar	Scandinavian Airlines
10 Mar - 17 Mar	Icelandair
26 Mar - 03 Apr	Lufthansa
20 Mar - 27 Mar	United
05 Mar - 15 Mar	Aer Lingus	direct
07 Mar - 15 Mar	Aer Lingus	direct
10 Mar - 17 Mar	Aer Lingus	direct
26 Mar - 03 Apr	Aer Lingus	direct
20 Mar - 27 Mar	Aer Lingus	direct

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

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 March from $402

Return flights