| Kalamaria to Oberkirch | 912.45 mi (1,468.45 km) |
| Kalamaria to Obernburg am Main | 925.07 mi (1,488.75 km) |
| Kalamaria to Obernkirchen | 1,038.26 mi (1,670.92 km) |
| Kalamaria to Oberschleissheim | 770.62 mi (1,240.20 km) |
| Kalamaria to Oberstdorf | 785.20 mi (1,263.66 km) |
| Kalamaria to Obertraubling | 782.81 mi (1,259.80 km) |
| Kalamaria to Obertshausen | 945.53 mi (1,521.69 km) |
| Kalamaria to Oberursel | 960.30 mi (1,545.45 km) |
| Kalamaria to Ochsenfurt | 884.79 mi (1,423.93 km) |
| Kalamaria to Ochsenhausen | 823.15 mi (1,324.73 km) |
| Kalamaria to Ochtrup | 1,094.82 mi (1,761.94 km) |
| Kalamaria to Odenthal | 1,046.03 mi (1,683.43 km) |
| Kalamaria to Oelde | 1,047.21 mi (1,685.33 km) |
| Kalamaria to Oelsnitz | 855.08 mi (1,376.12 km) |
| Kalamaria to Oer-Erkenschwick | 1,067.70 mi (1,718.30 km) |
