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

Return flights

07 May - 12 May	Iberia For Level	direct
07 May - 14 May	Iberia For Level	direct
16 May - 04 Jun	Iberia For Level	direct
08 May - 23 May	Scandinavian Airlines
07 May - 23 May	Iberia For Level	direct
15 May - 25 May	Scandinavian Airlines
26 May - 16 Jun	Scandinavian Airlines
17 May - 31 May	Iberia For Level	direct
30 May - 15 Jun	TAP
27 May - 20 Jun	Air Canada
26 May - 16 Jun	Iberia For 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 417€

Return flights