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

Return flights

27 Aug - 30 Aug	Air France
10 Aug - 24 Aug	Delta
18 Aug - 15 Sep	Air France
08 Aug - 15 Aug	British Airways
03 Aug - 13 Aug	United
03 Aug - 17 Aug	United
02 Aug - 16 Aug	British Airways
18 Aug - 15 Sep	Aer Lingus	direct
27 Aug - 30 Aug	Aer Lingus	direct
03 Aug - 13 Aug	Aer Lingus	direct
03 Aug - 17 Aug	Aer Lingus	direct
02 Aug - 16 Aug	Aer Lingus	direct

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

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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Cheapest return flights from Shannon to Boston in August from $527

Return flights