| Ferrara to Oberkirch | 305.55 mi (491.73 km) |
| Ferrara to Obernburg am Main | 364.77 mi (587.05 km) |
| Ferrara to Obernkirchen | 526.06 mi (846.61 km) |
| Ferrara to Oberschleissheim | 236.08 mi (379.94 km) |
| Ferrara to Oberstdorf | 189.18 mi (304.45 km) |
| Ferrara to Obertraubling | 286.70 mi (461.41 km) |
| Ferrara to Obertshausen | 384.20 mi (618.30 km) |
| Ferrara to Oberursel | 397.13 mi (639.12 km) |
| Ferrara to Ochsenfurt | 340.63 mi (548.19 km) |
| Ferrara to Ochsenhausen | 237.45 mi (382.14 km) |
| Ferrara to Ochtrup | 547.92 mi (881.79 km) |
| Ferrara to Odenthal | 476.12 mi (766.24 km) |
| Ferrara to Oelde | 509.04 mi (819.22 km) |
| Ferrara to Oelsnitz | 386.62 mi (622.21 km) |
| Ferrara to Oer-Erkenschwick | 511.32 mi (822.90 km) |
