| Blacksburg to Oerlinghausen | 4,217.02 mi (6,786.64 km) |
| Blacksburg to Oestrich-Winkel | 4,247.65 mi (6,835.94 km) |
| Blacksburg to Offenburg | 4,290.40 mi (6,904.73 km) |
| Blacksburg to Oftersheim | 4,289.92 mi (6,903.95 km) |
| Blacksburg to Ohrdruf | 4,331.24 mi (6,970.46 km) |
| Blacksburg to Ohringen | 4,332.15 mi (6,971.93 km) |
| Blacksburg to Olbernhau | 4,437.43 mi (7,141.35 km) |
| Blacksburg to Olching | 4,437.39 mi (7,141.28 km) |
| Blacksburg to Oldenburg | 4,166.50 mi (6,705.34 km) |
| Blacksburg to Oldenburg in Holstein | 4,233.31 mi (6,812.85 km) |
| Blacksburg to Olfen | 4,174.10 mi (6,717.57 km) |
| Blacksburg to Olpe | 4,211.59 mi (6,777.89 km) |
| Blacksburg to Olsberg | 4,227.61 mi (6,803.69 km) |
| Blacksburg to Oranienburg | 4,366.95 mi (7,027.93 km) |
| Blacksburg to Ortenberg | 4,279.36 mi (6,886.97 km) |
