| Sonoma to Orbetello | 6,146.50 mi (9,891.84 km) |
| Sonoma to Oria | 6,437.80 mi (10,360.64 km) |
| Sonoma to Oristano | 6,210.05 mi (9,994.11 km) |
| Sonoma to Orta Nova | 6,336.98 mi (10,198.39 km) |
| Sonoma to Orte | 6,178.94 mi (9,944.05 km) |
| Sonoma to Ortona | 6,241.49 mi (10,044.70 km) |
| Sonoma to Orvieto | 6,156.32 mi (9,907.64 km) |
| Sonoma to Orzinuovi | 5,942.49 mi (9,563.51 km) |
| Sonoma to Osimo | 6,150.54 mi (9,898.34 km) |
| Sonoma to Ospitaletto | 5,937.69 mi (9,555.79 km) |
| Sonoma to Ostuni | 6,422.56 mi (10,336.11 km) |
| Sonoma to Ottaviano | 6,331.10 mi (10,188.93 km) |
| Sonoma to Ovada | 5,948.16 mi (9,572.63 km) |
| Sonoma to Ozieri | 6,184.98 mi (9,953.76 km) |
| Sonoma to Paceco | 6,440.87 mi (10,365.58 km) |
