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

Return flights

04 Aug - 31 Aug	TAP
20 Aug - 07 Sep	TAP
19 Aug - 26 Aug	TAP
20 Aug - 03 Sep	TAP
20 Aug - 28 Aug	TAP
27 Aug - 07 Sep	TAP
25 Aug - 01 Sep	TAP
14 Aug - 10 Sep	TAP
21 Aug - 03 Sep	TAP
27 Aug - 03 Sep	TAP
27 Aug - 09 Sep	TAP
21 Aug - 02 Sep	TAP
30 Aug - 07 Sep	TAP
16 Aug - 24 Aug	Iberia For Level	direct
05 Aug - 24 Aug	Iberia For Level	direct
14 Aug - 21 Aug	Iberia For Level	direct
12 Aug - 21 Aug	Iberia For Level	direct
16 Aug - 30 Aug	Iberia For Level	direct
14 Aug - 26 Aug	Iberia For Level	direct
10 Aug - 21 Aug	Iberia For Level	direct

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

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 August from 324€

Return flights