AirHint found the following cheapest return flights from San Francisco (SFO) to Barcelona (BCN) in May 2026 (see full year).

Return flights

01 May - 14 May	TAP
07 May - 14 May	TAP
05 May - 12 May	TAP
14 May - 25 May	TAP
01 May - 01 Jun	TAP
14 May - 23 May	TAP
03 May - 11 May	ITA Airways
13 May - 24 May	Scandinavian Airlines
15 May - 23 May	Scandinavian Airlines
14 May - 23 May	Iberia	direct
07 May - 14 May	Iberia	direct
11 May - 06 Jun	Condor
19 May - 02 Jun	Condor
19 May - 13 Jun	Iberia	direct
20 May - 13 Jun	British Airways
30 May - 14 Jun	Iberia	direct
01 May - 01 Jun	United	direct

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

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 May from $390

Return flights