AirHint found the following cheapest return flights from Barcelona (BCN) to Boston (BOS) in October 2025 (see full year).

Return flights

23 Oct - 28 Oct	Iberia For Level	direct
23 Oct - 30 Oct	Iberia For Level	direct
22 Oct - 28 Oct	Iberia For Level	direct
23 Oct - 27 Oct	Iberia For Level	direct
23 Oct - 06 Nov	Iberia For Level	direct
16 Oct - 30 Oct	Iberia	direct
01 Oct - 05 Oct	Iberia
23 Oct - 29 Oct	Finnair
23 Oct - 26 Oct	Iberia
22 Oct - 26 Oct	Iberia
15 Oct - 22 Oct	Iberia	direct
23 Oct - 04 Nov	Iberia
09 Oct - 13 Nov	KLM
30 Oct - 04 Nov	KLM
30 Oct - 08 Nov	KLM
30 Oct - 09 Nov	KLM
30 Oct - 06 Nov	Delta
30 Oct - 02 Nov	Delta
29 Oct - 04 Nov	Delta
20 Oct - 10 Nov	United

Also check the deals for one-way flights from Barcelona to Boston in October.

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 Barcelona to Boston in October from 296€

Return flights