Cheapest return flights from Boston to Dublin in December from $387

Best time to book flights for Boston (BOS) to Dublin (DUB) flights at AirHint

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

Return flights

04 Dec - 09 Dec Icelandair
14 Dec - 05 Jan Fly Play
20 Dec - 03 Jan Fly Play
20 Dec - 02 Jan Fly Play
24 Dec - 06 Jan Icelandair
24 Dec - 05 Jan British Airways
24 Dec - 03 Jan Icelandair
25 Dec - 31 Dec Air Canada
24 Dec - 04 Jan Icelandair
25 Dec - 05 Jan Air Canada
25 Dec - 04 Jan Air Canada
25 Dec - 06 Jan Air France
25 Dec - 31 Dec Air France direct

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

Skyscanner

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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