| DeForest to Oberkirch | 4,366.66 mi (7,027.47 km) |
| DeForest to Obernburg am Main | 4,352.28 mi (7,004.31 km) |
| DeForest to Obernkirchen | 4,254.10 mi (6,846.31 km) |
| DeForest to Oberschleissheim | 4,506.10 mi (7,251.87 km) |
| DeForest to Oberstdorf | 4,494.50 mi (7,233.19 km) |
| DeForest to Obertraubling | 4,497.22 mi (7,237.58 km) |
| DeForest to Obertshausen | 4,332.00 mi (6,971.68 km) |
| DeForest to Oberursel | 4,317.27 mi (6,947.98 km) |
| DeForest to Ochsenfurt | 4,393.34 mi (7,070.40 km) |
| DeForest to Ochsenhausen | 4,454.48 mi (7,168.79 km) |
| DeForest to Ochtrup | 4,189.18 mi (6,741.83 km) |
| DeForest to Odenthal | 4,231.96 mi (6,810.67 km) |
| DeForest to Oelde | 4,237.38 mi (6,819.41 km) |
| DeForest to Oelsnitz | 4,435.77 mi (7,138.68 km) |
| DeForest to Oer-Erkenschwick | 4,213.07 mi (6,780.29 km) |
