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

Return flights

23 Jan - 28 Jan	Air Canada
21 Jan - 28 Jan	SWISS
29 Jan - 02 Feb	SWISS
20 Jan - 31 Jan	United
22 Jan - 28 Jan	United
13 Jan - 18 Jan	United
15 Jan - 21 Jan	United
22 Jan - 26 Jan	United
30 Jan - 04 Feb	United
28 Jan - 02 Feb	United
30 Jan - 13 Feb	United
22 Jan - 25 Jan	SWISS
16 Jan - 18 Jan	Air Canada
15 Jan - 18 Jan	Air Canada
29 Jan - 01 Feb	United
31 Jan - 09 Feb	KLM
26 Jan - 01 Feb	United
30 Jan - 10 Feb	KLM
27 Jan - 09 Feb	KLM
27 Jan - 03 Feb	KLM

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.

Book a cheap hotel in Dublin

Cheap car rent in Dublin

Cheapest return flights from Boston to Dublin in January from 288€

Return flights