| Ottaviano to Oberkirch | 616.30 mi (991.84 km) |
| Ottaviano to Obernburg am Main | 672.60 mi (1,082.44 km) |
| Ottaviano to Obernkirchen | 828.30 mi (1,333.02 km) |
| Ottaviano to Oberschleissheim | 530.89 mi (854.39 km) |
| Ottaviano to Oberstdorf | 498.58 mi (802.38 km) |
| Ottaviano to Obertraubling | 571.96 mi (920.48 km) |
| Ottaviano to Obertshausen | 692.58 mi (1,114.59 km) |
| Ottaviano to Oberursel | 706.00 mi (1,136.20 km) |
| Ottaviano to Ochsenfurt | 644.47 mi (1,037.18 km) |
| Ottaviano to Ochsenhausen | 546.47 mi (879.45 km) |
| Ottaviano to Ochtrup | 856.62 mi (1,378.59 km) |
| Ottaviano to Odenthal | 786.54 mi (1,265.82 km) |
| Ottaviano to Oelde | 815.92 mi (1,313.10 km) |
| Ottaviano to Oelsnitz | 670.27 mi (1,078.69 km) |
| Ottaviano to Oer-Erkenschwick | 820.77 mi (1,320.91 km) |
