| Cologno Monzese to Oerlinghausen | 445.70 mi (717.28 km) |
| Cologno Monzese to Oestrich-Winkel | 314.58 mi (506.27 km) |
| Cologno Monzese to Offenburg | 212.66 mi (342.24 km) |
| Cologno Monzese to Oftersheim | 267.42 mi (430.38 km) |
| Cologno Monzese to Ohrdruf | 372.22 mi (599.03 km) |
| Cologno Monzese to Ohringen | 253.88 mi (408.58 km) |
| Cologno Monzese to Olbernhau | 401.15 mi (645.60 km) |
| Cologno Monzese to Olching | 208.17 mi (335.01 km) |
| Cologno Monzese to Oldenburg | 528.33 mi (850.26 km) |
| Cologno Monzese to Oldenburg in Holstein | 610.19 mi (982.01 km) |
| Cologno Monzese to Olfen | 436.19 mi (701.98 km) |
| Cologno Monzese to Olpe | 384.95 mi (619.51 km) |
| Cologno Monzese to Olsberg | 403.86 mi (649.95 km) |
| Cologno Monzese to Oranienburg | 530.14 mi (853.18 km) |
| Cologno Monzese to Ortenberg | 333.69 mi (537.02 km) |
