| Busto Arsizio to Oerlinghausen | 439.15 mi (706.74 km) |
| Busto Arsizio to Oestrich-Winkel | 305.74 mi (492.04 km) |
| Busto Arsizio to Offenburg | 201.92 mi (324.96 km) |
| Busto Arsizio to Oftersheim | 259.99 mi (418.42 km) |
| Busto Arsizio to Ohrdruf | 370.62 mi (596.46 km) |
| Busto Arsizio to Ohringen | 249.75 mi (401.93 km) |
| Busto Arsizio to Olbernhau | 405.62 mi (652.78 km) |
| Busto Arsizio to Olching | 213.31 mi (343.29 km) |
| Busto Arsizio to Oldenburg | 521.19 mi (838.77 km) |
| Busto Arsizio to Oldenburg in Holstein | 606.97 mi (976.82 km) |
| Busto Arsizio to Olfen | 427.06 mi (687.29 km) |
| Busto Arsizio to Olpe | 376.34 mi (605.66 km) |
| Busto Arsizio to Olsberg | 396.81 mi (638.61 km) |
| Busto Arsizio to Oranienburg | 531.50 mi (855.36 km) |
| Busto Arsizio to Ortenberg | 327.90 mi (527.70 km) |
