| Great Neck to Oberkirch | 3,860.53 mi (6,212.92 km) |
| Great Neck to Obernburg am Main | 3,865.57 mi (6,221.04 km) |
| Great Neck to Obernkirchen | 3,795.91 mi (6,108.93 km) |
| Great Neck to Oberschleissheim | 4,012.55 mi (6,457.57 km) |
| Great Neck to Oberstdorf | 3,985.90 mi (6,414.68 km) |
| Great Neck to Obertraubling | 4,014.29 mi (6,460.38 km) |
| Great Neck to Obertshausen | 3,846.57 mi (6,190.45 km) |
| Great Neck to Oberursel | 3,832.32 mi (6,167.52 km) |
| Great Neck to Ochsenfurt | 3,908.53 mi (6,290.18 km) |
| Great Neck to Ochsenhausen | 3,951.56 mi (6,359.41 km) |
| Great Neck to Ochtrup | 3,722.39 mi (5,990.60 km) |
| Great Neck to Odenthal | 3,750.65 mi (6,036.09 km) |
| Great Neck to Oelde | 3,769.96 mi (6,067.16 km) |
| Great Neck to Oelsnitz | 3,969.08 mi (6,387.62 km) |
| Great Neck to Oer-Erkenschwick | 3,739.65 mi (6,018.39 km) |
