| Callaway to Oberkirch | 4,845.72 mi (7,798.43 km) |
| Callaway to Obernburg am Main | 4,853.47 mi (7,810.91 km) |
| Callaway to Obernkirchen | 4,786.33 mi (7,702.85 km) |
| Callaway to Oberschleissheim | 4,999.18 mi (8,045.40 km) |
| Callaway to Oberstdorf | 4,970.24 mi (7,998.82 km) |
| Callaway to Obertraubling | 5,002.28 mi (8,050.39 km) |
| Callaway to Obertshausen | 4,834.66 mi (7,780.63 km) |
| Callaway to Oberursel | 4,820.50 mi (7,757.84 km) |
| Callaway to Ochsenfurt | 4,896.55 mi (7,880.24 km) |
| Callaway to Ochsenhausen | 4,936.96 mi (7,945.28 km) |
| Callaway to Ochtrup | 4,712.38 mi (7,583.85 km) |
| Callaway to Odenthal | 4,739.40 mi (7,627.32 km) |
| Callaway to Oelde | 4,759.84 mi (7,660.23 km) |
| Callaway to Oelsnitz | 4,958.72 mi (7,980.28 km) |
| Callaway to Oer-Erkenschwick | 4,729.13 mi (7,610.80 km) |
