| Prairie Ridge to Oberkirch | 5,183.47 mi (8,341.99 km) |
| Prairie Ridge to Obernburg am Main | 5,132.68 mi (8,260.25 km) |
| Prairie Ridge to Obernkirchen | 4,990.38 mi (8,031.24 km) |
| Prairie Ridge to Oberschleissheim | 5,283.55 mi (8,503.05 km) |
| Prairie Ridge to Oberstdorf | 5,302.95 mi (8,534.28 km) |
| Prairie Ridge to Obertraubling | 5,254.63 mi (8,456.51 km) |
| Prairie Ridge to Obertshausen | 5,112.13 mi (8,227.17 km) |
| Prairie Ridge to Oberursel | 5,098.08 mi (8,204.56 km) |
| Prairie Ridge to Ochsenfurt | 5,165.59 mi (8,313.22 km) |
| Prairie Ridge to Ochsenhausen | 5,255.83 mi (8,458.44 km) |
| Prairie Ridge to Ochtrup | 4,949.39 mi (7,965.28 km) |
| Prairie Ridge to Odenthal | 5,015.13 mi (8,071.06 km) |
| Prairie Ridge to Oelde | 4,993.31 mi (8,035.95 km) |
| Prairie Ridge to Oelsnitz | 5,167.98 mi (8,317.05 km) |
| Prairie Ridge to Oer-Erkenschwick | 4,983.24 mi (8,019.76 km) |
