Cheapest return flights from Shannon to Boston in September from 612€

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

Return flights

26 Sep - 03 Oct Ryanair
25 Sep - 28 Sep United
27 Sep - 30 Sep United
29 Sep - 03 Oct Ryanair
24 Sep - 01 Oct Ryanair
29 Sep - 01 Oct Ryanair
26 Sep - 01 Oct Ryanair
24 Sep - 26 Sep Ryanair
24 Sep - 01 Oct Aer Lingus direct
25 Sep - 28 Sep Aer Lingus direct
24 Sep - 26 Sep Aer Lingus direct
23 Sep - 30 Sep Aer Lingus direct

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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