Cheapest return BOS–SNN flights, May

AirHint found the following cheapest return flights from Boston (BOS) to Shannon (SNN) in May 2026 (see full year).

Return flights

28 May - 05 Jun Aer Lingus direct
25 May - 03 Jun Aer Lingus direct
28 May - 08 Jun Aer Lingus direct
26 May - 02 Jun KLM
25 May - 02 Jun KLM
23 May - 01 Jun Air France
08 May - 11 May United
24 May - 31 May Delta
28 May - 16 Jun Air France
25 May - 30 May KLM
28 May - 16 Jun Aer Lingus direct
05 May - 11 May SWISS
07 May - 11 May United
13 May - 18 May United
06 May - 11 May British Airways
05 May - 09 May British Airways
05 May - 10 May British Airways
08 May - 10 May British Airways

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

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