| Mortara to Oberkirch | 229.03 mi (368.58 km) |
| Mortara to Obernburg am Main | 317.66 mi (511.23 km) |
| Mortara to Obernkirchen | 485.07 mi (780.65 km) |
| Mortara to Oberschleissheim | 246.43 mi (396.59 km) |
| Mortara to Oberstdorf | 166.09 mi (267.30 km) |
| Mortara to Obertraubling | 302.80 mi (487.31 km) |
| Mortara to Obertshausen | 332.82 mi (535.63 km) |
| Mortara to Oberursel | 342.33 mi (550.93 km) |
| Mortara to Ochsenfurt | 310.16 mi (499.15 km) |
| Mortara to Ochsenhausen | 203.10 mi (326.85 km) |
| Mortara to Ochtrup | 485.78 mi (781.79 km) |
| Mortara to Odenthal | 406.59 mi (654.35 km) |
| Mortara to Oelde | 455.68 mi (733.35 km) |
| Mortara to Oelsnitz | 390.47 mi (628.40 km) |
| Mortara to Oer-Erkenschwick | 446.94 mi (719.29 km) |
