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

Return flights

02 Mar - 09 Mar	Ryanair
09 Mar - 19 Mar	Ryanair
02 Mar - 05 Mar	Ryanair
04 Mar - 08 Mar	British Airways
07 Mar - 09 Mar	Aer Lingus	direct
04 Mar - 08 Mar	Aer Lingus	direct
02 Mar - 09 Mar	Aer Lingus	direct
12 Mar - 19 Mar	British Airways
12 Mar - 16 Mar	British Airways
12 Mar - 17 Mar	British Airways
29 Mar - 05 Apr	British Airways
28 Mar - 04 Apr	British Airways
26 Mar - 10 Apr	Ryanair
29 Mar - 05 Apr	Aer Lingus	direct
26 Mar - 10 Apr	Aer Lingus	direct

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

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.

Book a cheap hotel in Boston

Cheap car rent in Boston

Cheapest return flights from Shannon to Boston in March from $400

Return flights