| Rohnert Park to Orbetello | 6,149.96 mi (9,897.41 km) |
| Rohnert Park to Oria | 6,440.57 mi (10,365.10 km) |
| Rohnert Park to Oristano | 6,214.20 mi (10,000.79 km) |
| Rohnert Park to Orta Nova | 6,339.94 mi (10,203.15 km) |
| Rohnert Park to Orte | 6,182.24 mi (9,949.35 km) |
| Rohnert Park to Ortona | 6,244.52 mi (10,049.58 km) |
| Rohnert Park to Orvieto | 6,159.62 mi (9,912.96 km) |
| Rohnert Park to Orzinuovi | 5,945.74 mi (9,568.74 km) |
| Rohnert Park to Osimo | 6,153.56 mi (9,903.19 km) |
| Rohnert Park to Ospitaletto | 5,940.90 mi (9,560.95 km) |
| Rohnert Park to Ostuni | 6,425.31 mi (10,340.54 km) |
| Rohnert Park to Ottaviano | 6,334.30 mi (10,194.08 km) |
| Rohnert Park to Ovada | 5,951.67 mi (9,578.29 km) |
| Rohnert Park to Ozieri | 6,188.98 mi (9,960.21 km) |
| Rohnert Park to Paceco | 6,444.70 mi (10,371.75 km) |
