| Casale Monferrato to Oerlinghausen | 472.18 mi (759.89 km) |
| Casale Monferrato to Oestrich-Winkel | 336.87 mi (542.14 km) |
| Casale Monferrato to Offenburg | 231.59 mi (372.70 km) |
| Casale Monferrato to Oftersheim | 292.77 mi (471.16 km) |
| Casale Monferrato to Ohrdruf | 407.18 mi (655.29 km) |
| Casale Monferrato to Ohringen | 285.14 mi (458.89 km) |
| Casale Monferrato to Olbernhau | 443.75 mi (714.14 km) |
| Casale Monferrato to Olching | 251.43 mi (404.64 km) |
| Casale Monferrato to Oldenburg | 553.53 mi (890.81 km) |
| Casale Monferrato to Oldenburg in Holstein | 642.39 mi (1,033.83 km) |
| Casale Monferrato to Olfen | 457.46 mi (736.20 km) |
| Casale Monferrato to Olpe | 407.46 mi (655.74 km) |
| Casale Monferrato to Olsberg | 429.47 mi (691.17 km) |
| Casale Monferrato to Oranienburg | 569.10 mi (915.88 km) |
| Casale Monferrato to Ortenberg | 361.84 mi (582.32 km) |
