| Rockville Centre to Oberkirch | 3,862.45 mi (6,216.01 km) |
| Rockville Centre to Obernburg am Main | 3,867.82 mi (6,224.65 km) |
| Rockville Centre to Obernkirchen | 3,798.65 mi (6,113.34 km) |
| Rockville Centre to Oberschleissheim | 4,014.63 mi (6,460.92 km) |
| Rockville Centre to Oberstdorf | 3,987.73 mi (6,417.63 km) |
| Rockville Centre to Obertraubling | 4,016.55 mi (6,464.02 km) |
| Rockville Centre to Obertshausen | 3,848.84 mi (6,194.11 km) |
| Rockville Centre to Oberursel | 3,834.60 mi (6,171.20 km) |
| Rockville Centre to Ochsenfurt | 3,910.80 mi (6,293.82 km) |
| Rockville Centre to Ochsenhausen | 3,953.50 mi (6,362.54 km) |
| Rockville Centre to Ochtrup | 3,725.01 mi (5,994.82 km) |
| Rockville Centre to Odenthal | 3,753.02 mi (6,039.91 km) |
| Rockville Centre to Oelde | 3,772.55 mi (6,071.33 km) |
| Rockville Centre to Oelsnitz | 3,971.62 mi (6,391.71 km) |
| Rockville Centre to Oer-Erkenschwick | 3,742.16 mi (6,022.42 km) |
