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

Return flights

27 Aug - 31 Aug	Air France
29 Aug - 02 Sep	Lufthansa
20 Aug - 27 Aug	Air France
18 Aug - 15 Sep	KLM
05 Aug - 09 Aug	United
22 Aug - 25 Aug	United
12 Aug - 19 Aug	British Airways
10 Aug - 16 Aug	British Airways
12 Aug - 17 Aug	British Airways
03 Aug - 17 Aug	United
29 Aug - 02 Sep	Aer Lingus	direct
18 Aug - 15 Sep	Aer Lingus	direct
27 Aug - 31 Aug	Aer Lingus	direct
03 Aug - 06 Aug	United

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 $529

Return flights