Cheapest return flights from San Francisco to Barcelona in September from $594

Best time to book flights for San Francisco (SFO) to Barcelona (BCN) flights at AirHint

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

Return flights

23 Sep - 01 Oct Iberia
22 Sep - 30 Sep Scandinavian Airlines
24 Sep - 05 Oct Turkish Airlines
23 Sep - 30 Sep United direct
22 Sep - 30 Sep United direct
02 Sep - 09 Sep United direct
23 Sep - 01 Oct Lufthansa direct
24 Sep - 05 Oct United direct

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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