| Carolina to Oerlinghausen | 4,574.24 mi (7,361.52 km) |
| Carolina to Oestrich-Winkel | 4,545.16 mi (7,314.72 km) |
| Carolina to Offenburg | 4,543.01 mi (7,311.27 km) |
| Carolina to Oftersheim | 4,571.68 mi (7,357.41 km) |
| Carolina to Ohrdruf | 4,664.44 mi (7,506.69 km) |
| Carolina to Ohringen | 4,613.18 mi (7,424.20 km) |
| Carolina to Olbernhau | 4,778.54 mi (7,690.32 km) |
| Carolina to Olching | 4,698.98 mi (7,562.27 km) |
| Carolina to Oldenburg | 4,556.14 mi (7,332.40 km) |
| Carolina to Oldenburg in Holstein | 4,665.64 mi (7,508.62 km) |
| Carolina to Olfen | 4,519.25 mi (7,273.04 km) |
| Carolina to Olpe | 4,538.01 mi (7,303.22 km) |
| Carolina to Olsberg | 4,566.27 mi (7,348.69 km) |
| Carolina to Oranienburg | 4,765.64 mi (7,669.55 km) |
| Carolina to Ortenberg | 4,591.65 mi (7,389.54 km) |
