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

Return flights

30 Oct - 06 Nov	TAP
29 Oct - 05 Nov	TAP
31 Oct - 07 Nov	TAP
16 Oct - 25 Oct	TAP
15 Oct - 23 Oct	TAP
13 Oct - 23 Oct	TAP
15 Oct - 22 Oct	TAP
18 Oct - 25 Oct	TAP
16 Oct - 22 Oct	TAP
18 Oct - 30 Oct	TAP
23 Oct - 29 Oct	TAP
30 Oct - 13 Nov	TAP
24 Oct - 30 Oct	TAP
27 Oct - 03 Nov	Air Canada
20 Oct - 27 Oct	Iberia For Level	direct
30 Oct - 03 Nov	Iberia For Level	direct
30 Oct - 13 Nov	Iberia For Level	direct
27 Oct - 10 Nov	Iberia For Level	direct
27 Oct - 03 Nov	Iberia For Level	direct
28 Oct - 04 Nov	Iberia For Level	direct

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.

Book a cheap hotel in Barcelona

Cheap car rent in Barcelona

Cheapest return flights from Boston to Barcelona in October from 256€

Return flights