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

Return flights

18 Oct - 23 Oct	Iberia For Level	direct
04 Oct - 18 Oct	Iberia For Level	direct
28 Oct - 22 Nov	Scandinavian Airlines
16 Oct - 23 Oct	Scandinavian Airlines
29 Oct - 08 Nov	Scandinavian Airlines
07 Oct - 16 Oct	Air Canada
22 Oct - 31 Oct	Air Canada
06 Oct - 16 Oct	United
07 Oct - 21 Oct	Air Canada
14 Oct - 08 Nov	Scandinavian Airlines
07 Oct - 22 Oct	United
08 Oct - 15 Oct	Lufthansa
01 Oct - 14 Oct	SWISS
16 Oct - 08 Nov	Scandinavian Airlines
15 Oct - 19 Nov	United
25 Oct - 07 Nov	TAP
27 Oct - 22 Nov	TAP
25 Oct - 15 Nov	Scandinavian Airlines
13 Oct - 08 Nov	Air Canada
20 Oct - 15 Nov	Air Canada

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 350€

Return flights