AirHint found the following cheapest one-way flights from San Francisco (SFO) to Barcelona (BCN) in September 2026 (see full year).
One-Way flights
| 30 Sep | Aer Lingus | ||
| 29 Sep | Aer Lingus | ||
| 28 Sep | Iberia | ||
| 21 Sep | Iberia | ||
| 17 Sep | Iberia | ||
| 19 Sep | British Airways | ||
| 18 Sep | Aer Lingus | ||
| 02 Sep | TAP | ||
| 13 Sep | British Airways | ||
| 09 Sep | British Airways |
Also check the deals for return flights from San Francisco to Barcelona in September.
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