| Clayton to Oberkirch | 560.75 mi (902.44 km) |
| Clayton to Obernburg am Main | 540.61 mi (870.03 km) |
| Clayton to Obernkirchen | 465.69 mi (749.45 km) |
| Clayton to Oberschleissheim | 694.23 mi (1,117.25 km) |
| Clayton to Oberstdorf | 687.71 mi (1,106.77 km) |
| Clayton to Obertraubling | 687.02 mi (1,105.66 km) |
| Clayton to Obertshausen | 520.49 mi (837.65 km) |
| Clayton to Oberursel | 505.81 mi (814.03 km) |
| Clayton to Ochsenfurt | 582.17 mi (936.91 km) |
| Clayton to Ochsenhausen | 645.17 mi (1,038.30 km) |
| Clayton to Ochtrup | 389.66 mi (627.09 km) |
| Clayton to Odenthal | 421.19 mi (677.85 km) |
| Clayton to Oelde | 436.94 mi (703.19 km) |
| Clayton to Oelsnitz | 635.97 mi (1,023.50 km) |
| Clayton to Oer-Erkenschwick | 406.84 mi (654.75 km) |
