Cheapest return flights from Boston to Shannon in December from 300€

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

Return flights

11 Dec - 18 Dec Aer Lingus direct
12 Dec - 19 Dec Aer Lingus direct
04 Dec - 16 Dec Aer Lingus direct
12 Dec - 16 Dec Aer Lingus direct
04 Dec - 15 Dec Aer Lingus direct
05 Dec - 11 Dec Aer Lingus direct
28 Dec - 10 Jan Aer Lingus direct
12 Dec - 15 Dec Aer Lingus direct
27 Dec - 17 Jan Aer Lingus direct
14 Dec - 21 Dec Aer Lingus direct
15 Dec - 22 Dec Aer Lingus direct
07 Dec - 27 Dec Aer Lingus direct
16 Dec - 14 Jan Aer Lingus direct
23 Dec - 17 Jan Aer Lingus direct
17 Dec - 14 Jan Aer Lingus direct
26 Dec - 17 Jan British Airways
18 Dec - 26 Jan Spirit Airlines
18 Dec - 10 Jan Aer Lingus direct
18 Dec - 26 Jan Aer Lingus direct
18 Dec - 03 Jan Spirit Airlines

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

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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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