Cheapest return flights from Shannon to Boston in May from $492

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

Return flights

28 May - 08 Jun KLM
28 May - 04 Jun Delta
28 May - 01 Jun KLM
25 May - 31 May KLM
10 May - 20 May British Airways
21 May - 28 May British Airways
21 May - 30 May United
15 May - 21 May Aer Lingus direct
25 May - 31 May Aer Lingus direct
28 May - 08 Jun Aer Lingus direct
28 May - 04 Jun Aer Lingus direct
28 May - 01 Jun Aer Lingus direct
21 May - 30 May Aer Lingus direct
21 May - 28 May Aer Lingus direct
08 May - 24 May Iberia direct
11 May - 20 May United
31 May - 08 Jun Ryanair
31 May - 07 Jun Ryanair
30 May - 06 Jun Aer Lingus

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

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