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

Return flights

17 Aug - 24 Aug	Vueling Airlines	direct
19 Aug - 30 Aug	Vueling Airlines	direct
09 Aug - 24 Aug	Vueling Airlines	direct
24 Aug - 30 Aug	Vueling Airlines	direct
21 Aug - 28 Aug	TAP
18 Aug - 03 Sep	TAP
25 Aug - 31 Aug	TAP
18 Aug - 13 Sep	Iberia
14 Aug - 28 Aug	TAP
14 Aug - 26 Aug	TAP
13 Aug - 05 Sep	Air Canada
14 Aug - 28 Aug	Vueling Airlines	direct
20 Aug - 27 Aug	TAP
17 Aug - 02 Sep	Vueling Airlines	direct
18 Aug - 13 Sep	United	direct
13 Aug - 07 Sep	United
27 Aug - 03 Sep	TAP
17 Aug - 01 Sep	Air Canada
27 Aug - 07 Sep	TAP
18 Aug - 03 Sep	United	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 $399

Return flights