| Altus to Oberkirch | 5,163.51 mi (8,309.87 km) |
| Altus to Obernburg am Main | 5,149.56 mi (8,287.42 km) |
| Altus to Obernkirchen | 5,051.02 mi (8,128.83 km) |
| Altus to Oberschleissheim | 5,303.35 mi (8,534.91 km) |
| Altus to Oberstdorf | 5,291.33 mi (8,515.58 km) |
| Altus to Obertraubling | 5,294.52 mi (8,520.71 km) |
| Altus to Obertshausen | 5,129.29 mi (8,254.80 km) |
| Altus to Oberursel | 5,114.57 mi (8,231.10 km) |
| Altus to Ochsenfurt | 5,190.64 mi (8,353.53 km) |
| Altus to Ochsenhausen | 5,251.49 mi (8,451.46 km) |
| Altus to Ochtrup | 4,986.36 mi (8,024.77 km) |
| Altus to Odenthal | 5,029.26 mi (8,093.81 km) |
| Altus to Oelde | 5,034.56 mi (8,102.35 km) |
| Altus to Oelsnitz | 5,232.84 mi (8,421.44 km) |
| Altus to Oer-Erkenschwick | 5,010.35 mi (8,063.37 km) |
