| Trebnje to Oberkirch | 371.88 mi (598.49 km) |
| Trebnje to Obernburg am Main | 384.03 mi (618.04 km) |
| Trebnje to Obernkirchen | 513.33 mi (826.13 km) |
| Trebnje to Oberschleissheim | 228.77 mi (368.17 km) |
| Trebnje to Oberstdorf | 246.98 mi (397.48 km) |
| Trebnje to Obertraubling | 249.36 mi (401.31 km) |
| Trebnje to Obertshausen | 404.73 mi (651.34 km) |
| Trebnje to Oberursel | 419.47 mi (675.07 km) |
| Trebnje to Ochsenfurt | 345.40 mi (555.87 km) |
| Trebnje to Ochsenhausen | 281.32 mi (452.74 km) |
| Trebnje to Ochtrup | 560.14 mi (901.45 km) |
| Trebnje to Odenthal | 505.41 mi (813.38 km) |
| Trebnje to Oelde | 513.94 mi (827.10 km) |
| Trebnje to Oelsnitz | 337.72 mi (543.50 km) |
| Trebnje to Oer-Erkenschwick | 530.09 mi (853.09 km) |
