| Knowle to Oberkirch | 506.62 mi (815.33 km) |
| Knowle to Obernburg am Main | 502.81 mi (809.19 km) |
| Knowle to Obernkirchen | 457.79 mi (736.74 km) |
| Knowle to Oberschleissheim | 651.33 mi (1,048.22 km) |
| Knowle to Oberstdorf | 634.44 mi (1,021.04 km) |
| Knowle to Obertraubling | 651.57 mi (1,048.60 km) |
| Knowle to Obertshausen | 483.92 mi (778.79 km) |
| Knowle to Oberursel | 469.77 mi (756.03 km) |
| Knowle to Ochsenfurt | 545.82 mi (878.42 km) |
| Knowle to Ochsenhausen | 595.16 mi (957.82 km) |
| Knowle to Ochtrup | 376.98 mi (606.69 km) |
| Knowle to Odenthal | 389.94 mi (627.56 km) |
| Knowle to Oelde | 420.73 mi (677.10 km) |
| Knowle to Oelsnitz | 613.32 mi (987.05 km) |
| Knowle to Oer-Erkenschwick | 385.18 mi (619.88 km) |
