AirHint found the following cheapest one-way flights from Dublin (DUB) to Boston (BOS) in September 2025 (see full year).

One-Way flights

24 Sep	jetBlue	direct
25 Sep	jetBlue	direct
17 Sep	Vueling Airlines
23 Sep	Aer Lingus	direct
19 Sep	Aer Lingus	direct
17 Sep	Aer Lingus	direct
20 Sep	Aer Lingus
29 Sep	Ryanair
30 Sep	Ryanair
20 Sep	Aer Lingus	direct

Also check the deals for return flights from Dublin to Boston in September.

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 one-way flights from Dublin to Boston in September from $367

One-Way flights