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

One-Way flights

03 Dec	Icelandair
14 Dec	TAP
13 Dec	United
05 Dec	Air Canada
03 Dec	Aer Lingus	direct
02 Dec	Aer Lingus	direct
01 Dec	Aer Lingus	direct
07 Dec	Aer Lingus	direct
08 Dec	Aer Lingus	direct
10 Dec	Aer Lingus	direct

Also check the deals for return flights from Boston to Dublin in December.

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 one-way flights from Boston to Dublin in December from 244€

One-Way flights