Cheapest return flights from Shannon to Boston in September from 637€

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

Return flights

25 Sep - 28 Sep United
25 Sep - 04 Oct United
29 Sep - 03 Oct Ryanair
24 Sep - 01 Oct Ryanair
30 Sep - 02 Oct Ryanair
24 Sep - 26 Sep Ryanair
22 Sep - 26 Sep Aer Lingus
24 Sep - 01 Oct Aer Lingus direct
23 Sep - 30 Sep Aer Lingus direct
24 Sep - 26 Sep Aer Lingus direct
22 Sep - 26 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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