Cheapest return flights from Shannon to Boston in September from $584

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

Return flights

05 Sep - 12 Sep Aer Lingus direct
06 Sep - 12 Sep Aer Lingus direct
18 Sep - 28 Sep Aer Lingus direct
12 Sep - 23 Sep Aer Lingus direct
06 Sep - 13 Sep Aer Lingus direct
08 Sep - 15 Sep Aer Lingus direct
18 Sep - 02 Oct Aer Lingus direct
24 Sep - 01 Oct Aer Lingus direct
01 Sep - 15 Sep Ryanair
02 Sep - 09 Sep Ryanair
17 Sep - 30 Sep Ryanair
02 Sep - 09 Sep Aer Lingus direct
22 Sep - 02 Oct Ryanair

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

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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