| Nikaia to Oberkirch | 1,066.44 mi (1,716.27 km) |
| Nikaia to Obernburg am Main | 1,088.62 mi (1,751.96 km) |
| Nikaia to Obernkirchen | 1,210.46 mi (1,948.04 km) |
| Nikaia to Oberschleissheim | 933.30 mi (1,502.00 km) |
| Nikaia to Oberstdorf | 938.62 mi (1,510.56 km) |
| Nikaia to Obertraubling | 950.73 mi (1,530.05 km) |
| Nikaia to Obertshausen | 1,109.33 mi (1,785.29 km) |
| Nikaia to Oberursel | 1,124.07 mi (1,809.01 km) |
| Nikaia to Ochsenfurt | 1,049.87 mi (1,689.60 km) |
| Nikaia to Ochsenhausen | 979.74 mi (1,576.74 km) |
| Nikaia to Ochtrup | 1,263.23 mi (2,032.96 km) |
| Nikaia to Odenthal | 1,210.00 mi (1,947.31 km) |
| Nikaia to Oelde | 1,216.23 mi (1,957.34 km) |
| Nikaia to Oelsnitz | 1,028.23 mi (1,654.77 km) |
| Nikaia to Oer-Erkenschwick | 1,234.28 mi (1,986.39 km) |
