Cheapest return flights from Boston to Dublin in December from $309

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

Return flights

04 Dec - 10 Dec Lufthansa
11 Dec - 16 Dec Lufthansa
11 Dec - 15 Dec Austrian Airlines
05 Dec - 08 Dec Lufthansa
10 Dec - 15 Dec Austrian Airlines
04 Dec - 07 Dec Austrian Airlines
02 Dec - 09 Dec Austrian Airlines
10 Dec - 17 Dec Austrian Airlines
05 Dec - 12 Dec Lufthansa
01 Dec - 08 Dec Austrian Airlines
30 Dec - 24 Jan Aer Lingus direct
31 Dec - 24 Jan Aer Lingus direct
31 Dec - 09 Jan Aer Lingus direct
25 Dec - 17 Jan Air Canada
26 Dec - 17 Jan Air Canada
28 Dec - 17 Jan Air France
26 Dec - 23 Jan Air Canada
24 Dec - 17 Jan Air Canada
28 Dec - 17 Jan Aer Lingus direct
28 Dec - 10 Jan Delta

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

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