Cheapest return flights from Shannon to Boston in August from $521

Best time to book flights for Shannon (SNN) to Boston (BOS) flights at AirHint

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

Return flights

29 Aug - 02 Sep Delta
30 Aug - 17 Sep United
29 Aug - 02 Sep Aer Lingus direct
30 Aug - 17 Sep Aer Lingus direct
13 Aug - 28 Aug Aer Lingus direct
07 Aug - 10 Aug Aer Lingus direct
03 Aug - 10 Aug United
03 Aug - 10 Aug Aer Lingus direct
14 Aug - 19 Aug Ryanair
14 Aug - 19 Aug Aer Lingus direct
09 Aug - 16 Aug United

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