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

Return flights

05 May - 12 May	Iberia	direct
07 May - 14 May	Iberia	direct
05 May - 14 May	Iberia	direct
10 May - 14 May	Iberia	direct
17 May - 26 May	Iberia	direct
19 May - 31 May	LEVEL	direct
12 May - 19 May	LEVEL	direct
01 May - 14 May	Scandinavian Airlines
01 May - 22 May	Scandinavian Airlines
03 May - 10 May	Scandinavian Airlines
26 May - 10 Jun	TAP
26 May - 11 Jun	TAP
01 May - 01 Jun	TAP
26 May - 08 Jun	TAP
26 May - 09 Jun	TAP
28 May - 07 Jun	TAP
02 May - 30 Jun	Air Canada
26 May - 09 Jun	LEVEL	direct
23 May - 06 Jun	TAP
31 May - 07 Jun	LEVEL	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 $394

Return flights