| Trencin to Oerlinghausen | 463.44 mi (745.83 km) |
| Trencin to Oestrich-Winkel | 456.96 mi (735.41 km) |
| Trencin to Offenburg | 461.52 mi (742.74 km) |
| Trencin to Oftersheim | 428.32 mi (689.31 km) |
| Trencin to Ohrdruf | 351.56 mi (565.79 km) |
| Trencin to Ohringen | 386.98 mi (622.79 km) |
| Trencin to Olbernhau | 242.98 mi (391.04 km) |
| Trencin to Olching | 310.97 mi (500.46 km) |
| Trencin to Oldenburg | 517.55 mi (832.92 km) |
| Trencin to Oldenburg in Holstein | 483.13 mi (777.52 km) |
| Trencin to Olfen | 508.44 mi (818.25 km) |
| Trencin to Olpe | 476.29 mi (766.51 km) |
| Trencin to Olsberg | 455.60 mi (733.22 km) |
| Trencin to Oranienburg | 339.12 mi (545.76 km) |
| Trencin to Ortenberg | 414.24 mi (666.65 km) |
