| Keller to Oberkirch | 5,174.48 mi (8,327.52 km) |
| Keller to Obernburg am Main | 5,164.99 mi (8,312.25 km) |
| Keller to Obernkirchen | 5,072.52 mi (8,163.43 km) |
| Keller to Oberschleissheim | 5,317.67 mi (8,557.96 km) |
| Keller to Oberstdorf | 5,302.07 mi (8,532.86 km) |
| Keller to Obertraubling | 5,311.29 mi (8,547.69 km) |
| Keller to Obertshausen | 5,144.95 mi (8,279.99 km) |
| Keller to Oberursel | 5,130.28 mi (8,256.39 km) |
| Keller to Ochsenfurt | 5,206.64 mi (8,379.27 km) |
| Keller to Ochsenhausen | 5,263.46 mi (8,470.73 km) |
| Keller to Ochtrup | 5,005.72 mi (8,055.92 km) |
| Keller to Odenthal | 5,045.52 mi (8,119.97 km) |
| Keller to Oelde | 5,053.95 mi (8,133.55 km) |
| Keller to Oelsnitz | 5,253.10 mi (8,454.05 km) |
| Keller to Oer-Erkenschwick | 5,028.31 mi (8,092.28 km) |
