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

Return flights

25 Aug - 31 Aug	Fly Play
13 Aug - 21 Aug	SWISS
12 Aug - 19 Aug	SWISS
27 Aug - 31 Aug	Fly Play
17 Aug - 22 Aug	Aer Lingus	direct
11 Aug - 21 Aug	Air Canada
11 Aug - 21 Aug	Delta	direct
15 Aug - 23 Aug	Air Canada
06 Aug - 13 Aug	Air Canada
03 Aug - 13 Aug	Air Canada
17 Aug - 01 Sep	Air Canada
28 Aug - 02 Sep	Icelandair
17 Aug - 19 Sep	Aer Lingus	direct
27 Aug - 01 Sep	Air Canada
27 Aug - 03 Sep	United
26 Aug - 01 Sep	Air Canada
30 Aug - 11 Sep	Air Canada
29 Aug - 02 Sep	Air Canada
26 Aug - 02 Sep	Aer Lingus	direct
31 Aug - 03 Sep	Aer Lingus	direct

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

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 August from $315

Return flights