| Trebnje to Oerlinghausen | 507.46 mi (816.68 km) |
| Trebnje to Oestrich-Winkel | 429.81 mi (691.71 km) |
| Trebnje to Offenburg | 376.04 mi (605.18 km) |
| Trebnje to Oftersheim | 382.64 mi (615.80 km) |
| Trebnje to Ohrdruf | 392.23 mi (631.24 km) |
| Trebnje to Ohringen | 342.82 mi (551.72 km) |
| Trebnje to Olbernhau | 337.51 mi (543.17 km) |
| Trebnje to Olching | 234.96 mi (378.13 km) |
| Trebnje to Oldenburg | 584.76 mi (941.09 km) |
| Trebnje to Oldenburg in Holstein | 607.54 mi (977.74 km) |
| Trebnje to Olfen | 529.81 mi (852.65 km) |
| Trebnje to Olpe | 481.79 mi (775.37 km) |
| Trebnje to Olsberg | 479.24 mi (771.26 km) |
| Trebnje to Oranienburg | 479.52 mi (771.71 km) |
| Trebnje to Ortenberg | 411.69 mi (662.55 km) |
