| Tredegar to Oberkirch | 548.37 mi (882.51 km) |
| Tredegar to Obernburg am Main | 556.19 mi (895.10 km) |
| Tredegar to Obernkirchen | 525.89 mi (846.34 km) |
| Tredegar to Oberschleissheim | 699.65 mi (1,125.97 km) |
| Tredegar to Oberstdorf | 675.15 mi (1,086.54 km) |
| Tredegar to Obertraubling | 704.71 mi (1,134.12 km) |
| Tredegar to Obertshausen | 538.32 mi (866.35 km) |
| Tredegar to Oberursel | 524.71 mi (844.45 km) |
| Tredegar to Ochsenfurt | 599.53 mi (964.84 km) |
| Tredegar to Ochsenhausen | 638.90 mi (1,028.21 km) |
| Tredegar to Ochtrup | 444.40 mi (715.19 km) |
| Tredegar to Odenthal | 448.98 mi (722.56 km) |
| Tredegar to Oelde | 486.16 mi (782.40 km) |
| Tredegar to Oelsnitz | 673.82 mi (1,084.41 km) |
| Tredegar to Oer-Erkenschwick | 448.88 mi (722.41 km) |
