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

Return flights

31 Oct - 06 Nov	Aer Lingus	direct
10 Oct - 13 Oct	United
09 Oct - 21 Oct	United
02 Oct - 13 Oct	United
14 Oct - 19 Oct	United
02 Oct - 06 Oct	United
02 Oct - 07 Oct	United
09 Oct - 20 Oct	United
29 Oct - 11 Nov	Aer Lingus	direct
31 Oct - 03 Nov	Aer Lingus	direct
31 Oct - 04 Nov	Aer Lingus	direct
10 Oct - 20 Oct	United
19 Oct - 23 Oct	Aer Lingus	direct
18 Oct - 21 Oct	Aer Lingus	direct
29 Oct - 02 Nov	Aer Lingus	direct
21 Oct - 02 Nov	Aer Lingus	direct
30 Oct - 02 Nov	Aer Lingus	direct
26 Oct - 06 Nov	Aer Lingus
26 Oct - 06 Nov	Aer Lingus	direct
24 Oct - 02 Nov	Aer Lingus

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

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 October from 377€

Return flights