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

One-Way flights

25 Sep	Vueling Airlines	direct
18 Sep	Vueling Airlines
23 Sep	Ryanair
30 Sep	Aer Lingus
22 Sep	Wizz Air Malta
26 Sep	Ryanair
24 Sep	Vueling Airlines
27 Sep	Vueling Airlines
20 Sep	Ryanair
23 Sep	Vueling Airlines	direct

Also check the deals for return flights from Barcelona 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 Barcelona to Boston in September from $381

One-Way flights