| Fiumicino to Oberkirch | 509.19 mi (819.46 km) |
| Fiumicino to Obernburg am Main | 577.21 mi (928.94 km) |
| Fiumicino to Obernkirchen | 739.97 mi (1,190.87 km) |
| Fiumicino to Oberschleissheim | 449.13 mi (722.80 km) |
| Fiumicino to Oberstdorf | 401.54 mi (646.21 km) |
| Fiumicino to Obertraubling | 497.42 mi (800.52 km) |
| Fiumicino to Obertshausen | 596.14 mi (959.39 km) |
| Fiumicino to Oberursel | 608.57 mi (979.40 km) |
| Fiumicino to Ochsenfurt | 554.56 mi (892.48 km) |
| Fiumicino to Ochsenhausen | 449.73 mi (723.77 km) |
| Fiumicino to Ochtrup | 758.94 mi (1,221.40 km) |
| Fiumicino to Odenthal | 684.68 mi (1,101.89 km) |
| Fiumicino to Oelde | 721.55 mi (1,161.22 km) |
| Fiumicino to Oelsnitz | 597.67 mi (961.85 km) |
| Fiumicino to Oer-Erkenschwick | 721.58 mi (1,161.28 km) |
