AirHint found the following cheapest return flights from Boston (BOS) to Dublin (DUB) in October 2025 (see full year).

Return flights

30 Oct - 10 Nov	United
27 Oct - 10 Nov	United
06 Oct - 14 Oct	Air Canada
21 Oct - 29 Oct	Air Canada
10 Oct - 18 Oct	Air Canada
10 Oct - 19 Oct	Air Canada
09 Oct - 18 Oct	Air Canada
30 Oct - 13 Nov	United
17 Oct - 26 Oct	Air Canada
24 Oct - 02 Nov	United
28 Oct - 04 Nov	Aer Lingus	direct
29 Oct - 05 Nov	Aer Lingus	direct
28 Oct - 06 Nov	Aer Lingus	direct
16 Oct - 30 Oct	Air Canada
22 Oct - 31 Oct	United
19 Oct - 31 Oct	United
20 Oct - 26 Oct	Air Canada
26 Oct - 02 Nov	Aer Lingus	direct
27 Oct - 03 Nov	Aer Lingus	direct
31 Oct - 07 Nov	Aer Lingus	direct

Also check the deals for one-way flights from Boston to Dublin in October.

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 October from 296€

Return flights