Cheapest return flights from Boston to Shannon in August from 331€

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

Return flights

27 Aug - 30 Aug United
04 Aug - 29 Aug United
20 Aug - 27 Aug United
20 Aug - 12 Sep United
27 Aug - 30 Aug Aer Lingus direct
04 Aug - 29 Aug Aer Lingus direct
20 Aug - 27 Aug Aer Lingus direct
20 Aug - 12 Sep Aer Lingus direct

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

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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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