Cheapest return flights from Boston to Shannon in December from $396

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

Return flights

05 Dec - 15 Dec American Airlines
05 Dec - 14 Dec Aer Lingus direct
07 Dec - 27 Dec Aer Lingus direct
05 Dec - 15 Dec Aer Lingus direct
17 Dec - 31 Dec Aer Lingus direct
20 Dec - 27 Dec Aer Lingus direct
30 Dec - 04 Jan Aer Lingus direct

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