| San Donato Milanese to Oberkirch | 222.44 mi (357.98 km) |
| San Donato Milanese to Obernburg am Main | 305.68 mi (491.94 km) |
| San Donato Milanese to Obernkirchen | 473.32 mi (761.73 km) |
| San Donato Milanese to Oberschleissheim | 223.90 mi (360.33 km) |
| San Donato Milanese to Oberstdorf | 145.90 mi (234.81 km) |
| San Donato Milanese to Obertraubling | 280.44 mi (451.32 km) |
| San Donato Milanese to Obertshausen | 321.91 mi (518.07 km) |
| San Donato Milanese to Oberursel | 332.26 mi (534.73 km) |
| San Donato Milanese to Ochsenfurt | 294.86 mi (474.53 km) |
| San Donato Milanese to Ochsenhausen | 186.29 mi (299.80 km) |
| San Donato Milanese to Ochtrup | 478.43 mi (769.96 km) |
| San Donato Milanese to Odenthal | 400.44 mi (644.45 km) |
| San Donato Milanese to Oelde | 446.25 mi (718.17 km) |
| San Donato Milanese to Oelsnitz | 370.57 mi (596.38 km) |
| San Donato Milanese to Oer-Erkenschwick | 439.87 mi (707.91 km) |
