| Trencin to Oberkirch | 454.13 mi (730.85 km) |
| Trencin to Obernburg am Main | 405.32 mi (652.30 km) |
| Trencin to Obernkirchen | 455.04 mi (732.32 km) |
| Trencin to Oberschleissheim | 299.01 mi (481.21 km) |
| Trencin to Oberstdorf | 371.78 mi (598.33 km) |
| Trencin to Obertraubling | 266.44 mi (428.79 km) |
| Trencin to Obertshausen | 420.76 mi (677.15 km) |
| Trencin to Oberursel | 433.32 mi (697.37 km) |
| Trencin to Ochsenfurt | 362.93 mi (584.07 km) |
| Trencin to Ochsenhausen | 374.57 mi (602.81 km) |
| Trencin to Ochtrup | 527.67 mi (849.20 km) |
| Trencin to Odenthal | 506.86 mi (815.71 km) |
| Trencin to Oelde | 480.31 mi (772.98 km) |
| Trencin to Oelsnitz | 282.82 mi (455.15 km) |
| Trencin to Oer-Erkenschwick | 512.25 mi (824.39 km) |
