AirHint found the following cheapest return flights from San Jose (SJC) to Barcelona (BCN) in September 2025 (see full year).

Return flights

23 Sep - 02 Oct	American Airlines
24 Sep - 02 Oct	Air France
21 Sep - 04 Oct	Air France
24 Sep - 04 Oct	Air France
30 Sep - 14 Oct	Iberia
23 Sep - 01 Oct	British Airways
27 Sep - 09 Oct	British Airways
18 Sep - 21 Sep	Iberia
26 Sep - 10 Oct	Iberia
08 Sep - 15 Sep	Scandinavian Airlines
26 Sep - 18 Oct	Scandinavian Airlines
10 Sep - 17 Sep	Finnair
10 Sep - 13 Sep	Scandinavian Airlines
12 Sep - 18 Sep	British Airways
19 Sep - 29 Sep	Scandinavian Airlines
12 Sep - 04 Oct	Finnair
12 Sep - 19 Sep	Scandinavian Airlines
07 Sep - 27 Sep	Scandinavian Airlines
26 Sep - 29 Sep	Scandinavian Airlines
18 Sep - 28 Sep	British Airways

Also check the deals for one-way flights from San Jose to Barcelona in September.

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 Jose to Barcelona in September from $441

Return flights