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

Return flights

15 Oct - 09 Nov	SWISS
28 Oct - 04 Nov	Aer Lingus	direct
29 Oct - 05 Nov	Aer Lingus	direct
30 Oct - 04 Nov	Air Canada
27 Oct - 03 Nov	United
31 Oct - 07 Nov	United
22 Oct - 31 Oct	Icelandair
26 Oct - 31 Oct	SWISS
22 Oct - 29 Oct	Air Canada
26 Oct - 02 Nov	Air Canada
14 Oct - 21 Oct	Air Canada
25 Oct - 01 Nov	United
24 Oct - 31 Oct	Icelandair
30 Oct - 06 Nov	United
07 Oct - 19 Oct	Icelandair
22 Oct - 31 Oct	Aer Lingus	direct
22 Oct - 29 Oct	Aer Lingus	direct
15 Oct - 21 Oct	Icelandair
07 Oct - 13 Oct	Icelandair
26 Oct - 02 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 $328

Return flights