| Cologno al Serio to Oerlinghausen | 443.54 mi (713.81 km) |
| Cologno al Serio to Oestrich-Winkel | 315.18 mi (507.23 km) |
| Cologno al Serio to Offenburg | 215.89 mi (347.44 km) |
| Cologno al Serio to Oftersheim | 266.80 mi (429.38 km) |
| Cologno al Serio to Ohrdruf | 365.48 mi (588.18 km) |
| Cologno al Serio to Ohringen | 250.06 mi (402.44 km) |
| Cologno al Serio to Olbernhau | 389.04 mi (626.09 km) |
| Cologno al Serio to Olching | 196.24 mi (315.82 km) |
| Cologno al Serio to Oldenburg | 526.62 mi (847.51 km) |
| Cologno al Serio to Oldenburg in Holstein | 604.54 mi (972.91 km) |
| Cologno al Serio to Olfen | 436.71 mi (702.82 km) |
| Cologno al Serio to Olpe | 385.06 mi (619.69 km) |
| Cologno al Serio to Olsberg | 402.30 mi (647.45 km) |
| Cologno al Serio to Oranienburg | 520.44 mi (837.56 km) |
| Cologno al Serio to Ortenberg | 331.09 mi (532.84 km) |
