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

Return flights

26 Aug - 31 Aug	Air France
13 Aug - 24 Aug	KLM
07 Aug - 16 Aug	United
03 Aug - 17 Aug	United
26 Aug - 31 Aug	Aer Lingus	direct
13 Aug - 24 Aug	Aer Lingus	direct
07 Aug - 16 Aug	Aer Lingus	direct
03 Aug - 17 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 452€

Return flights