| San Donato Milanese to Oerlinghausen | 453.38 mi (729.65 km) |
| San Donato Milanese to Oestrich-Winkel | 322.09 mi (518.36 km) |
| San Donato Milanese to Offenburg | 219.91 mi (353.91 km) |
| San Donato Milanese to Oftersheim | 275.04 mi (442.64 km) |
| San Donato Milanese to Ohrdruf | 379.94 mi (611.45 km) |
| San Donato Milanese to Ohringen | 261.63 mi (421.05 km) |
| San Donato Milanese to Olbernhau | 408.35 mi (657.17 km) |
| San Donato Milanese to Olching | 215.34 mi (346.56 km) |
| San Donato Milanese to Oldenburg | 535.99 mi (862.59 km) |
| San Donato Milanese to Oldenburg in Holstein | 617.94 mi (994.48 km) |
| San Donato Milanese to Olfen | 443.68 mi (714.04 km) |
| San Donato Milanese to Olpe | 392.49 mi (631.65 km) |
| San Donato Milanese to Olsberg | 411.52 mi (662.27 km) |
| San Donato Milanese to Oranienburg | 537.66 mi (865.29 km) |
| San Donato Milanese to Ortenberg | 341.40 mi (549.43 km) |
