| Smartno to Oberkirch | 360.44 mi (580.07 km) |
| Smartno to Obernburg am Main | 371.97 mi (598.63 km) |
| Smartno to Obernkirchen | 501.48 mi (807.06 km) |
| Smartno to Oberschleissheim | 216.72 mi (348.78 km) |
| Smartno to Oberstdorf | 235.95 mi (379.73 km) |
| Smartno to Obertraubling | 237.44 mi (382.12 km) |
| Smartno to Obertshausen | 392.66 mi (631.93 km) |
| Smartno to Oberursel | 407.41 mi (655.66 km) |
| Smartno to Ochsenfurt | 333.33 mi (536.44 km) |
| Smartno to Ochsenhausen | 269.74 mi (434.10 km) |
| Smartno to Ochtrup | 548.09 mi (882.06 km) |
| Smartno to Odenthal | 493.35 mi (793.97 km) |
| Smartno to Oelde | 501.91 mi (807.75 km) |
| Smartno to Oelsnitz | 326.27 mi (525.08 km) |
| Smartno to Oer-Erkenschwick | 518.01 mi (833.66 km) |
