| Nea Ionia to Oberkirch | 1,067.27 mi (1,717.61 km) |
| Nea Ionia to Obernburg am Main | 1,088.71 mi (1,752.12 km) |
| Nea Ionia to Obernkirchen | 1,209.75 mi (1,946.91 km) |
| Nea Ionia to Oberschleissheim | 933.42 mi (1,502.19 km) |
| Nea Ionia to Oberstdorf | 939.44 mi (1,511.88 km) |
| Nea Ionia to Obertraubling | 950.40 mi (1,529.51 km) |
| Nea Ionia to Obertshausen | 1,109.41 mi (1,785.43 km) |
| Nea Ionia to Oberursel | 1,124.16 mi (1,809.16 km) |
| Nea Ionia to Ochsenfurt | 1,049.82 mi (1,689.53 km) |
| Nea Ionia to Ochsenhausen | 980.35 mi (1,577.72 km) |
| Nea Ionia to Ochtrup | 1,262.92 mi (2,032.48 km) |
| Nea Ionia to Odenthal | 1,210.10 mi (1,947.46 km) |
| Nea Ionia to Oelde | 1,215.86 mi (1,956.74 km) |
| Nea Ionia to Oelsnitz | 1,027.38 mi (1,653.41 km) |
| Nea Ionia to Oer-Erkenschwick | 1,234.15 mi (1,986.17 km) |
