Cheapest return flights from Boston to Shannon in March from $353

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

Return flights

29 Mar - 07 Apr Aer Lingus direct
16 Mar - 23 Mar Aer Lingus direct
22 Mar - 29 Mar Aer Lingus direct
03 Mar - 18 Mar Aer Lingus direct
16 Mar - 26 Mar Aer Lingus direct
03 Mar - 10 Mar Aer Lingus direct
23 Mar - 01 Apr Aer Lingus direct
14 Mar - 18 Mar jetBlue
14 Mar - 17 Mar jetBlue
13 Mar - 23 Mar Aer Lingus
13 Mar - 18 Mar Aer Lingus
16 Mar - 22 Mar Air Canada

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

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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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