| Calverton to Oberkirch | 4,068.87 mi (6,548.21 km) |
| Calverton to Obernburg am Main | 4,073.44 mi (6,555.57 km) |
| Calverton to Obernkirchen | 4,002.71 mi (6,441.74 km) |
| Calverton to Oberschleissheim | 4,220.67 mi (6,792.51 km) |
| Calverton to Oberstdorf | 4,194.32 mi (6,750.10 km) |
| Calverton to Obertraubling | 4,222.13 mi (6,794.85 km) |
| Calverton to Obertshausen | 4,054.39 mi (6,524.91 km) |
| Calverton to Oberursel | 4,040.12 mi (6,501.94 km) |
| Calverton to Ochsenfurt | 4,116.37 mi (6,624.65 km) |
| Calverton to Ochsenhausen | 4,159.86 mi (6,694.65 km) |
| Calverton to Ochtrup | 3,929.48 mi (6,323.88 km) |
| Calverton to Odenthal | 3,958.29 mi (6,370.25 km) |
| Calverton to Oelde | 3,977.11 mi (6,400.54 km) |
| Calverton to Oelsnitz | 4,176.35 mi (6,721.18 km) |
| Calverton to Oer-Erkenschwick | 3,947.01 mi (6,352.09 km) |
