| Trnava to Oberkirch | 435.40 mi (700.71 km) |
| Trnava to Obernburg am Main | 394.95 mi (635.61 km) |
| Trnava to Obernkirchen | 459.77 mi (739.93 km) |
| Trnava to Oberschleissheim | 276.76 mi (445.41 km) |
| Trnava to Oberstdorf | 345.01 mi (555.24 km) |
| Trnava to Obertraubling | 250.63 mi (403.34 km) |
| Trnava to Obertshausen | 411.68 mi (662.54 km) |
| Trnava to Oberursel | 424.92 mi (683.85 km) |
| Trnava to Ochsenfurt | 351.84 mi (566.24 km) |
| Trnava to Ochsenhausen | 352.17 mi (566.76 km) |
| Trnava to Ochtrup | 529.03 mi (851.39 km) |
| Trnava to Odenthal | 502.05 mi (807.97 km) |
| Trnava to Oelde | 481.08 mi (774.22 km) |
| Trnava to Oelsnitz | 281.48 mi (452.99 km) |
| Trnava to Oer-Erkenschwick | 510.83 mi (822.10 km) |
