Cheapest return flights from San Francisco to Barcelona in September from 351€

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

Return flights

28 Sep - 23 Oct Iberia
28 Sep - 09 Oct Lufthansa
30 Sep - 07 Oct Iberia
21 Sep - 01 Oct Delta
24 Sep - 01 Oct Iberia
27 Sep - 07 Oct Delta
27 Sep - 09 Oct Delta
30 Sep - 14 Oct Air France
29 Sep - 06 Oct SWISS
28 Sep - 06 Oct SWISS
23 Sep - 30 Sep United
21 Sep - 30 Sep United
16 Sep - 23 Sep SWISS
15 Sep - 22 Sep SWISS
17 Sep - 24 Sep Lufthansa
22 Sep - 24 Sep ITA Airways
22 Sep - 25 Sep ITA Airways
20 Sep - 30 Sep Delta
19 Sep - 26 Sep United direct
22 Sep - 29 Sep SWISS

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

Skyscanner

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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