| Mount Holly to Oberkirch | 4,407.15 mi (7,092.62 km) |
| Mount Holly to Obernburg am Main | 4,413.00 mi (7,102.03 km) |
| Mount Holly to Obernkirchen | 4,343.63 mi (6,990.40 km) |
| Mount Holly to Oberschleissheim | 4,559.63 mi (7,338.02 km) |
| Mount Holly to Oberstdorf | 4,532.24 mi (7,293.93 km) |
| Mount Holly to Obertraubling | 4,561.74 mi (7,341.41 km) |
| Mount Holly to Obertshausen | 4,394.04 mi (7,071.52 km) |
| Mount Holly to Oberursel | 4,379.81 mi (7,048.62 km) |
| Mount Holly to Ochsenfurt | 4,455.99 mi (7,171.22 km) |
| Mount Holly to Ochsenhausen | 4,498.26 mi (7,239.24 km) |
| Mount Holly to Ochtrup | 4,270.13 mi (6,872.12 km) |
| Mount Holly to Odenthal | 4,298.26 mi (6,917.38 km) |
| Mount Holly to Oelde | 4,317.70 mi (6,948.67 km) |
| Mount Holly to Oelsnitz | 4,516.81 mi (7,269.11 km) |
| Mount Holly to Oer-Erkenschwick | 4,287.37 mi (6,899.85 km) |
