| Radford to Oerlinghausen | 4,227.35 mi (6,803.26 km) |
| Radford to Oestrich-Winkel | 4,257.97 mi (6,852.54 km) |
| Radford to Offenburg | 4,300.70 mi (6,921.30 km) |
| Radford to Oftersheim | 4,300.22 mi (6,920.54 km) |
| Radford to Ohrdruf | 4,341.56 mi (6,987.07 km) |
| Radford to Ohringen | 4,342.46 mi (6,988.52 km) |
| Radford to Olbernhau | 4,447.76 mi (7,157.97 km) |
| Radford to Olching | 4,447.69 mi (7,157.87 km) |
| Radford to Oldenburg | 4,176.83 mi (6,721.95 km) |
| Radford to Oldenburg in Holstein | 4,243.62 mi (6,829.45 km) |
| Radford to Olfen | 4,184.42 mi (6,734.18 km) |
| Radford to Olpe | 4,221.91 mi (6,794.50 km) |
| Radford to Olsberg | 4,237.94 mi (6,820.30 km) |
| Radford to Oranienburg | 4,377.27 mi (7,044.54 km) |
| Radford to Ortenberg | 4,289.68 mi (6,903.58 km) |
