| Rock Hill to Orbetello | 4,748.28 mi (7,641.62 km) |
| Rock Hill to Oria | 5,102.61 mi (8,211.85 km) |
| Rock Hill to Oristano | 4,710.98 mi (7,581.59 km) |
| Rock Hill to Orta Nova | 4,987.08 mi (8,025.93 km) |
| Rock Hill to Orte | 4,800.02 mi (7,724.89 km) |
| Rock Hill to Ortona | 4,893.07 mi (7,874.64 km) |
| Rock Hill to Orvieto | 4,779.11 mi (7,691.24 km) |
| Rock Hill to Orzinuovi | 4,597.13 mi (7,398.36 km) |
| Rock Hill to Osimo | 4,813.91 mi (7,747.24 km) |
| Rock Hill to Ospitaletto | 4,598.37 mi (7,400.35 km) |
| Rock Hill to Ostuni | 5,091.75 mi (8,194.38 km) |
| Rock Hill to Ottaviano | 4,949.08 mi (7,964.77 km) |
| Rock Hill to Ovada | 4,564.28 mi (7,345.51 km) |
| Rock Hill to Ozieri | 4,708.14 mi (7,577.01 km) |
| Rock Hill to Paceco | 4,961.44 mi (7,984.67 km) |
