AirHint found the following cheapest return flights from Shannon (SNN) to Boston (BOS) in January 2026 (see full year).

Return flights

16 Jan - 19 Jan	Aer Lingus
22 Jan - 26 Jan	Aer Lingus
12 Jan - 19 Jan	Aer Lingus
12 Jan - 18 Jan	Aer Lingus
14 Jan - 19 Jan	Aer Lingus
15 Jan - 18 Jan	Aer Lingus
15 Jan - 23 Jan	British Airways
12 Jan - 20 Jan	British Airways
16 Jan - 19 Jan	Aer Lingus	direct
09 Jan - 15 Jan	Aer Lingus	direct
30 Jan - 03 Feb	Aer Lingus	direct
31 Jan - 15 Feb	British Airways
31 Jan - 15 Feb	Aer Lingus	direct

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

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 January from 433€

Return flights