| Rock Hill to Oskaloosa (Iowa) | 767.85 mi (1,235.73 km) |
| Rock Hill to Oswego (Illinois) | 611.21 mi (983.64 km) |
| Rock Hill to Oswego (New York) | 635.66 mi (1,023.00 km) |
| Rock Hill to Otsego (Minnesota) | 973.39 mi (1,566.53 km) |
| Rock Hill to Ottawa (Illinois) | 612.75 mi (986.13 km) |
| Rock Hill to Ottawa (Kansas) | 826.61 mi (1,330.30 km) |
| Rock Hill to Ottumwa (Iowa) | 748.29 mi (1,204.26 km) |
| Rock Hill to Overland (Missouri) | 577.93 mi (930.09 km) |
| Rock Hill to Overland Park (Kansas) | 801.51 mi (1,289.90 km) |
| Rock Hill to Overlea (Maryland) | 393.54 mi (633.34 km) |
| Rock Hill to Oviedo (Florida) | 434.25 mi (698.86 km) |
| Rock Hill to Owasso (Oklahoma) | 836.06 mi (1,345.50 km) |
| Rock Hill to Owatonna (Minnesota) | 905.33 mi (1,456.99 km) |
| Rock Hill to Owensboro (Kentucky) | 390.81 mi (628.94 km) |
| Rock Hill to Owings Mills (Maryland) | 386.79 mi (622.47 km) |
