| Clay Cross to Oberkirch | 522.69 mi (841.20 km) |
| Clay Cross to Obernburg am Main | 508.04 mi (817.61 km) |
| Clay Cross to Obernkirchen | 444.68 mi (715.65 km) |
| Clay Cross to Oberschleissheim | 660.23 mi (1,062.53 km) |
| Clay Cross to Oberstdorf | 650.18 mi (1,046.37 km) |
| Clay Cross to Obertraubling | 655.71 mi (1,055.26 km) |
| Clay Cross to Obertshausen | 488.30 mi (785.84 km) |
| Clay Cross to Oberursel | 473.76 mi (762.44 km) |
| Clay Cross to Ochsenfurt | 550.26 mi (885.56 km) |
| Clay Cross to Ochsenhausen | 608.63 mi (979.50 km) |
| Clay Cross to Ochtrup | 366.13 mi (589.23 km) |
| Clay Cross to Odenthal | 390.50 mi (628.45 km) |
| Clay Cross to Oelde | 412.27 mi (663.48 km) |
| Clay Cross to Oelsnitz | 609.49 mi (980.88 km) |
| Clay Cross to Oer-Erkenschwick | 379.76 mi (611.17 km) |
