| Nea Smyrni to Oberkirch | 1,070.33 mi (1,722.54 km) |
| Nea Smyrni to Obernburg am Main | 1,092.25 mi (1,757.80 km) |
| Nea Smyrni to Obernkirchen | 1,213.77 mi (1,953.37 km) |
| Nea Smyrni to Oberschleissheim | 936.93 mi (1,507.85 km) |
| Nea Smyrni to Oberstdorf | 942.51 mi (1,516.82 km) |
| Nea Smyrni to Obertraubling | 954.19 mi (1,535.62 km) |
| Nea Smyrni to Obertshausen | 1,112.95 mi (1,791.13 km) |
| Nea Smyrni to Oberursel | 1,127.70 mi (1,814.85 km) |
| Nea Smyrni to Ochsenfurt | 1,053.44 mi (1,695.35 km) |
| Nea Smyrni to Ochsenhausen | 983.56 mi (1,582.88 km) |
| Nea Smyrni to Ochtrup | 1,266.70 mi (2,038.56 km) |
| Nea Smyrni to Odenthal | 1,213.63 mi (1,953.15 km) |
| Nea Smyrni to Oelde | 1,219.68 mi (1,962.89 km) |
| Nea Smyrni to Oelsnitz | 1,031.48 mi (1,660.00 km) |
| Nea Smyrni to Oer-Erkenschwick | 1,237.83 mi (1,992.09 km) |
