| Oak Grove to Oberkirch | 5,297.75 mi (8,525.91 km) |
| Oak Grove to Obernburg am Main | 5,247.90 mi (8,445.69 km) |
| Oak Grove to Obernkirchen | 5,106.49 mi (8,218.10 km) |
| Oak Grove to Oberschleissheim | 5,399.14 mi (8,689.07 km) |
| Oak Grove to Oberstdorf | 5,417.72 mi (8,718.97 km) |
| Oak Grove to Obertraubling | 5,370.69 mi (8,643.29 km) |
| Oak Grove to Obertshausen | 5,227.32 mi (8,412.56 km) |
| Oak Grove to Oberursel | 5,213.22 mi (8,389.87 km) |
| Oak Grove to Ochsenfurt | 5,281.10 mi (8,499.11 km) |
| Oak Grove to Ochsenhausen | 5,370.71 mi (8,643.32 km) |
| Oak Grove to Ochtrup | 5,064.81 mi (8,151.02 km) |
| Oak Grove to Odenthal | 5,130.04 mi (8,256.00 km) |
| Oak Grove to Oelde | 5,108.92 mi (8,222.01 km) |
| Oak Grove to Oelsnitz | 5,284.51 mi (8,504.60 km) |
| Oak Grove to Oer-Erkenschwick | 5,098.46 mi (8,205.17 km) |
