| Fort Drum to Oberkirch | 3,808.69 mi (6,129.50 km) |
| Fort Drum to Obernburg am Main | 3,806.19 mi (6,125.48 km) |
| Fort Drum to Obernkirchen | 3,725.51 mi (5,995.63 km) |
| Fort Drum to Oberschleissheim | 3,956.43 mi (6,367.26 km) |
| Fort Drum to Oberstdorf | 3,935.55 mi (6,333.66 km) |
| Fort Drum to Obertraubling | 3,954.12 mi (6,363.53 km) |
| Fort Drum to Obertshausen | 3,786.62 mi (6,093.97 km) |
| Fort Drum to Oberursel | 3,772.12 mi (6,070.64 km) |
| Fort Drum to Ochsenfurt | 3,848.62 mi (6,193.75 km) |
| Fort Drum to Ochsenhausen | 3,898.83 mi (6,274.57 km) |
| Fort Drum to Ochtrup | 3,654.82 mi (5,881.87 km) |
| Fort Drum to Odenthal | 3,688.69 mi (5,936.37 km) |
| Fort Drum to Oelde | 3,702.85 mi (5,959.17 km) |
| Fort Drum to Oelsnitz | 3,902.61 mi (6,280.64 km) |
| Fort Drum to Oer-Erkenschwick | 3,674.65 mi (5,913.78 km) |
