| Fort Carson to Oberkirch | 5,144.65 mi (8,279.52 km) |
| Fort Carson to Obernburg am Main | 5,119.88 mi (8,239.65 km) |
| Fort Carson to Obernkirchen | 5,007.27 mi (8,058.42 km) |
| Fort Carson to Oberschleissheim | 5,275.12 mi (8,489.49 km) |
| Fort Carson to Oberstdorf | 5,271.98 mi (8,484.43 km) |
| Fort Carson to Obertraubling | 5,260.40 mi (8,465.79 km) |
| Fort Carson to Obertshausen | 5,099.22 mi (8,206.41 km) |
| Fort Carson to Oberursel | 5,084.47 mi (8,182.66 km) |
| Fort Carson to Ochsenfurt | 5,159.23 mi (8,302.98 km) |
| Fort Carson to Ochsenhausen | 5,229.45 mi (8,415.98 km) |
| Fort Carson to Ochtrup | 4,948.41 mi (7,963.70 km) |
| Fort Carson to Odenthal | 4,998.53 mi (8,044.36 km) |
| Fort Carson to Oelde | 4,996.12 mi (8,040.48 km) |
| Fort Carson to Oelsnitz | 5,190.63 mi (8,353.51 km) |
| Fort Carson to Oer-Erkenschwick | 4,975.60 mi (8,007.46 km) |
