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

Return flights

19 Oct - 25 Oct	Iberia For Level	direct
18 Oct - 25 Oct	Iberia For Level	direct
15 Oct - 19 Nov	TAP
07 Oct - 14 Oct	Air Canada
01 Oct - 08 Oct	Air Canada
15 Oct - 22 Oct	Air Canada
14 Oct - 21 Oct	Air Canada
13 Oct - 20 Oct	TAP
29 Oct - 05 Nov	TAP
22 Oct - 29 Oct	Air Canada
02 Oct - 09 Oct	Iberia
21 Oct - 28 Oct	Air Canada
27 Oct - 03 Nov	TAP
31 Oct - 07 Nov	TAP
30 Oct - 06 Nov	Air Canada
23 Oct - 06 Nov	TAP
01 Oct - 04 Nov	TAP
28 Oct - 04 Nov	Air Canada
15 Oct - 04 Nov	TAP
26 Oct - 02 Nov	Scandinavian Airlines

Also check the deals for one-way flights from San Francisco 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 San Francisco to Barcelona in October from 347€

Return flights