| Ancona to Oberkirch | 427.80 mi (688.47 km) |
| Ancona to Obernburg am Main | 477.10 mi (767.81 km) |
| Ancona to Obernkirchen | 631.05 mi (1,015.58 km) |
| Ancona to Oberschleissheim | 333.52 mi (536.75 km) |
| Ancona to Oberstdorf | 305.29 mi (491.32 km) |
| Ancona to Obertraubling | 375.13 mi (603.72 km) |
| Ancona to Obertshausen | 497.34 mi (800.38 km) |
| Ancona to Oberursel | 511.05 mi (822.46 km) |
| Ancona to Ochsenfurt | 447.71 mi (720.51 km) |
| Ancona to Ochsenhausen | 352.41 mi (567.15 km) |
| Ancona to Ochtrup | 661.20 mi (1,064.10 km) |
| Ancona to Odenthal | 593.13 mi (954.55 km) |
| Ancona to Oelde | 619.66 mi (997.25 km) |
| Ancona to Oelsnitz | 474.08 mi (762.96 km) |
| Ancona to Oer-Erkenschwick | 626.02 mi (1,007.48 km) |
