| Alfter to Obernburg am Main | 112.64 mi (181.28 km) |
| Alfter to Obernkirchen | 139.31 mi (224.21 km) |
| Alfter to Oberschleissheim | 266.99 mi (429.68 km) |
| Alfter to Oberstdorf | 273.28 mi (439.80 km) |
| Alfter to Obertraubling | 260.21 mi (418.76 km) |
| Alfter to Obertshausen | 92.68 mi (149.15 km) |
| Alfter to Oberursel | 78.14 mi (125.75 km) |
| Alfter to Ochsenfurt | 154.64 mi (248.86 km) |
| Alfter to Ochsenhausen | 226.51 mi (364.53 km) |
| Alfter to Ochtrup | 101.87 mi (163.94 km) |
| Alfter to Odenthal | 21.10 mi (33.95 km) |
| Alfter to Oelde | 90.46 mi (145.57 km) |
| Alfter to Oelsnitz | 227.32 mi (365.84 km) |
| Alfter to Oer-Erkenschwick | 63.51 mi (102.21 km) |
| Alfter to Oerlinghausen | 111.13 mi (178.85 km) |
