| Mercogliano to Oerlinghausen | 815.32 mi (1,312.13 km) |
| Mercogliano to Oestrich-Winkel | 706.48 mi (1,136.97 km) |
| Mercogliano to Offenburg | 618.72 mi (995.74 km) |
| Mercogliano to Oftersheim | 655.76 mi (1,055.34 km) |
| Mercogliano to Ohrdruf | 710.76 mi (1,143.85 km) |
| Mercogliano to Ohringen | 626.13 mi (1,007.65 km) |
| Mercogliano to Olbernhau | 676.60 mi (1,088.88 km) |
| Mercogliano to Olching | 530.18 mi (853.24 km) |
| Mercogliano to Oldenburg | 897.69 mi (1,444.69 km) |
| Mercogliano to Oldenburg in Holstein | 941.21 mi (1,514.73 km) |
| Mercogliano to Olfen | 823.31 mi (1,324.99 km) |
| Mercogliano to Olpe | 771.49 mi (1,241.59 km) |
| Mercogliano to Olsberg | 779.57 mi (1,254.60 km) |
| Mercogliano to Oranienburg | 820.51 mi (1,320.48 km) |
| Mercogliano to Ortenberg | 706.76 mi (1,137.42 km) |
