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

Return flights

12 Jan - 19 Jan	United
22 Jan - 29 Jan	United
14 Jan - 21 Jan	Aer Lingus	direct
21 Jan - 28 Jan	Aer Lingus	direct
13 Jan - 20 Jan	Aer Lingus	direct
20 Jan - 27 Jan	Aer Lingus	direct
02 Jan - 09 Jan	Icelandair
12 Jan - 15 Jan	Aer Lingus	direct
13 Jan - 16 Jan	Aer Lingus	direct
18 Jan - 21 Jan	Aer Lingus	direct

Also check the deals for one-way flights from Boston 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 Boston to Dublin in January from 302€

Return flights