AirHint found the following cheapest one-way flights from San Francisco (SFO) to Barcelona (BCN) in September 2026 (see full year).
One-Way flights
| 01 Sep | Iberia | direct | |
| 08 Sep | LEVEL | direct | |
| 10 Sep | LEVEL | direct | |
| 19 Sep | Iberia | direct | |
| 12 Sep | Alaska Airlines | ||
| 12 Sep | LEVEL | direct | |
| 25 Sep | Alaska Airlines | ||
| 11 Sep | Alaska Airlines | ||
| 11 Sep | United | direct |
Also check the deals for return flights from San Francisco to Barcelona in September.
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