AirHint found the following cheapest return flights from Boston (BOS) to Barcelona (BCN) in October 2026 (see full year).

Return flights

12 Oct - 15 Oct	LEVEL	direct
01 Oct - 15 Oct	LEVEL	direct
23 Oct - 29 Oct	LEVEL	direct
29 Oct - 12 Nov	LEVEL	direct
24 Oct - 27 Oct	Iberia	direct
01 Oct - 08 Oct	Iberia	direct
02 Oct - 05 Oct	Iberia	direct
04 Oct - 07 Oct	Iberia	direct
05 Oct - 08 Oct	Iberia	direct
06 Oct - 13 Oct	Iberia	direct
11 Oct - 14 Oct	Iberia	direct
22 Oct - 05 Nov	LEVEL	direct
27 Oct - 03 Nov	Iberia	direct
29 Oct - 05 Nov	Iberia	direct
31 Oct - 03 Nov	Iberia	direct
31 Oct - 07 Nov	Iberia	direct
21 Oct - 04 Nov	Air Canada
28 Oct - 04 Nov	Iberia
29 Oct - 01 Nov	Iberia
26 Oct - 02 Nov	Iberia

Also check the deals for one-way flights from Boston to Barcelona 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 Boston to Barcelona in October from $368

Return flights