Cheapest return flights from Boston to Shannon in August from $409

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

Return flights

22 Aug - 29 Aug United
21 Aug - 28 Aug United
28 Aug - 02 Sep United
22 Aug - 28 Aug United
28 Aug - 07 Sep Aer Lingus
18 Aug - 25 Aug British Airways

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

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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