| Ottaviano to Oerlinghausen | 815.80 mi (1,312.90 km) |
| Ottaviano to Oestrich-Winkel | 705.29 mi (1,135.06 km) |
| Ottaviano to Offenburg | 616.23 mi (991.73 km) |
| Ottaviano to Oftersheim | 654.60 mi (1,053.48 km) |
| Ottaviano to Ohrdruf | 712.35 mi (1,146.42 km) |
| Ottaviano to Ohringen | 625.70 mi (1,006.96 km) |
| Ottaviano to Olbernhau | 680.48 mi (1,095.13 km) |
| Ottaviano to Olching | 531.04 mi (854.63 km) |
| Ottaviano to Oldenburg | 898.39 mi (1,445.82 km) |
| Ottaviano to Oldenburg in Holstein | 943.97 mi (1,519.17 km) |
| Ottaviano to Olfen | 822.75 mi (1,324.09 km) |
| Ottaviano to Olpe | 770.84 mi (1,240.54 km) |
| Ottaviano to Olsberg | 779.60 mi (1,254.64 km) |
| Ottaviano to Oranienburg | 824.57 mi (1,327.02 km) |
| Ottaviano to Ortenberg | 706.68 mi (1,137.29 km) |
