AirHint found the following cheapest one-way flights from San Francisco (SFO) to Barcelona (BCN) in September 2025 (see full year).
One-Way flights
| 16 Sep | TAP | ||
| 22 Sep | TAP | ||
| 09 Sep | TAP | ||
| 29 Sep | TAP | ||
| 28 Sep | Iberia For Level | direct | |
| 30 Sep | Iberia For Level | direct | |
| 21 Sep | Hawaiian Airlines | ||
| 24 Sep | TAP | ||
| 26 Sep | Frontier Airlines | ||
| 27 Sep | Frontier Airlines |
Also check the deals for return flights from San Francisco to Barcelona in September.
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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