| Grugliasco to Oberkirch | 240.62 mi (387.24 km) |
| Grugliasco to Obernburg am Main | 337.69 mi (543.46 km) |
| Grugliasco to Obernkirchen | 502.27 mi (808.33 km) |
| Grugliasco to Oberschleissheim | 289.95 mi (466.64 km) |
| Grugliasco to Oberstdorf | 206.97 mi (333.08 km) |
| Grugliasco to Obertraubling | 345.21 mi (555.57 km) |
| Grugliasco to Obertshausen | 350.29 mi (563.73 km) |
| Grugliasco to Oberursel | 357.84 mi (575.89 km) |
| Grugliasco to Ochsenfurt | 337.29 mi (542.82 km) |
| Grugliasco to Ochsenhausen | 236.11 mi (379.99 km) |
| Grugliasco to Ochtrup | 493.48 mi (794.17 km) |
| Grugliasco to Odenthal | 412.71 mi (664.19 km) |
| Grugliasco to Oelde | 468.17 mi (753.44 km) |
| Grugliasco to Oelsnitz | 426.46 mi (686.33 km) |
| Grugliasco to Oer-Erkenschwick | 454.48 mi (731.41 km) |
