| Santa Clara to Orbetello | 6,186.10 mi (9,955.57 km) |
| Santa Clara to Oria | 6,480.32 mi (10,429.06 km) |
| Santa Clara to Oristano | 6,246.53 mi (10,052.82 km) |
| Santa Clara to Orta Nova | 6,378.72 mi (10,265.57 km) |
| Santa Clara to Orte | 6,219.26 mi (10,008.93 km) |
| Santa Clara to Ortona | 6,282.96 mi (10,111.45 km) |
| Santa Clara to Orvieto | 6,196.62 mi (9,972.49 km) |
| Santa Clara to Orzinuovi | 5,983.05 mi (9,628.79 km) |
| Santa Clara to Osimo | 6,192.07 mi (9,965.17 km) |
| Santa Clara to Ospitaletto | 5,978.42 mi (9,621.33 km) |
| Santa Clara to Ostuni | 6,465.16 mi (10,404.67 km) |
| Santa Clara to Ottaviano | 6,371.83 mi (10,254.47 km) |
| Santa Clara to Ovada | 5,987.54 mi (9,636.02 km) |
| Santa Clara to Ozieri | 6,222.13 mi (10,013.56 km) |
| Santa Clara to Paceco | 6,478.78 mi (10,426.58 km) |
