| Tredegar to Oerlinghausen | 507.56 mi (816.85 km) |
| Tredegar to Oestrich-Winkel | 504.53 mi (811.97 km) |
| Tredegar to Offenburg | 544.55 mi (876.38 km) |
| Tredegar to Oftersheim | 544.17 mi (875.76 km) |
| Tredegar to Ohrdruf | 606.23 mi (975.63 km) |
| Tredegar to Ohringen | 586.81 mi (944.37 km) |
| Tredegar to Olbernhau | 719.73 mi (1,158.29 km) |
| Tredegar to Olching | 690.84 mi (1,111.80 km) |
| Tredegar to Oldenburg | 490.81 mi (789.89 km) |
| Tredegar to Oldenburg in Holstein | 610.91 mi (983.16 km) |
| Tredegar to Olfen | 454.09 mi (730.79 km) |
| Tredegar to Olpe | 479.80 mi (772.16 km) |
| Tredegar to Olsberg | 503.88 mi (810.92 km) |
| Tredegar to Oranienburg | 698.47 mi (1,124.07 km) |
| Tredegar to Ortenberg | 542.16 mi (872.52 km) |
