| Grugliasco to Oerlinghausen | 479.24 mi (771.26 km) |
| Grugliasco to Oestrich-Winkel | 341.34 mi (549.33 km) |
| Grugliasco to Offenburg | 235.43 mi (378.89 km) |
| Grugliasco to Oftersheim | 301.01 mi (484.42 km) |
| Grugliasco to Ohrdruf | 423.82 mi (682.08 km) |
| Grugliasco to Ohringen | 299.42 mi (481.88 km) |
| Grugliasco to Olbernhau | 469.59 mi (755.73 km) |
| Grugliasco to Olching | 279.75 mi (450.21 km) |
| Grugliasco to Oldenburg | 558.73 mi (899.18 km) |
| Grugliasco to Oldenburg in Holstein | 654.57 mi (1,053.44 km) |
| Grugliasco to Olfen | 459.47 mi (739.44 km) |
| Grugliasco to Olpe | 411.18 mi (661.74 km) |
| Grugliasco to Olsberg | 436.03 mi (701.73 km) |
| Grugliasco to Oranienburg | 589.55 mi (948.79 km) |
| Grugliasco to Ortenberg | 371.73 mi (598.25 km) |
