| San Clemente to Orbetello | 6,274.08 mi (10,097.15 km) |
| San Clemente to Oria | 6,585.31 mi (10,598.04 km) |
| San Clemente to Oristano | 6,315.06 mi (10,163.11 km) |
| San Clemente to Orta Nova | 6,479.23 mi (10,427.32 km) |
| San Clemente to Orte | 6,311.55 mi (10,157.46 km) |
| San Clemente to Ortona | 6,382.20 mi (10,271.16 km) |
| San Clemente to Orvieto | 6,288.88 mi (10,120.97 km) |
| San Clemente to Orzinuovi | 6,077.93 mi (9,781.48 km) |
| San Clemente to Osimo | 6,292.08 mi (10,126.12 km) |
| San Clemente to Ospitaletto | 6,074.36 mi (9,775.75 km) |
| San Clemente to Ostuni | 6,570.75 mi (10,574.60 km) |
| San Clemente to Ottaviano | 6,465.96 mi (10,405.96 km) |
| San Clemente to Ovada | 6,075.10 mi (9,776.92 km) |
| San Clemente to Ozieri | 6,294.88 mi (10,130.63 km) |
| San Clemente to Paceco | 6,554.90 mi (10,549.09 km) |
