Cheapest return flights from Shannon to Boston in September from $467

Best time to book flights for Shannon (SNN) to Boston (BOS) flights at AirHint

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

Return flights

17 Sep - 21 Sep Air France
19 Sep - 21 Sep Delta
15 Sep - 20 Sep Ryanair
19 Sep - 28 Sep Ryanair
19 Sep - 28 Sep Aer Lingus direct
17 Sep - 21 Sep Aer Lingus direct
15 Sep - 20 Sep Aer Lingus direct
19 Sep - 21 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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