Cheapest return flights from San Francisco to Barcelona in September from $377

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

20 Sep - 27 Sep LEVEL direct
27 Sep - 30 Sep LEVEL direct
28 Sep - 07 Oct LEVEL direct
27 Sep - 07 Oct LEVEL direct
22 Sep - 06 Oct TAP
25 Sep - 15 Oct TAP
17 Sep - 02 Oct TAP
21 Sep - 30 Sep LEVEL direct
21 Sep - 07 Oct LEVEL direct
23 Sep - 04 Oct LEVEL direct
16 Sep - 30 Sep TAP
04 Sep - 16 Sep LEVEL direct
11 Sep - 23 Sep LEVEL direct
02 Sep - 09 Sep LEVEL direct
06 Sep - 13 Sep LEVEL direct
09 Sep - 16 Sep LEVEL direct
02 Sep - 16 Sep LEVEL direct
09 Sep - 07 Oct LEVEL direct
21 Sep - 09 Oct LEVEL direct
21 Sep - 02 Oct LEVEL 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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