| Gilbert to Oberkirch | 5,677.36 mi (9,136.83 km) |
| Gilbert to Obernburg am Main | 5,650.28 mi (9,093.25 km) |
| Gilbert to Obernkirchen | 5,534.32 mi (8,906.62 km) |
| Gilbert to Oberschleissheim | 5,805.61 mi (9,343.23 km) |
| Gilbert to Oberstdorf | 5,804.41 mi (9,341.29 km) |
| Gilbert to Obertraubling | 5,789.48 mi (9,317.27 km) |
| Gilbert to Obertshausen | 5,629.57 mi (9,059.92 km) |
| Gilbert to Oberursel | 5,614.83 mi (9,036.20 km) |
| Gilbert to Ochsenfurt | 5,689.16 mi (9,155.81 km) |
| Gilbert to Ochsenhausen | 5,761.38 mi (9,272.04 km) |
| Gilbert to Ochtrup | 5,477.10 mi (8,814.54 km) |
| Gilbert to Odenthal | 5,528.90 mi (8,897.90 km) |
| Gilbert to Oelde | 5,524.60 mi (8,890.99 km) |
| Gilbert to Oelsnitz | 5,717.72 mi (9,201.79 km) |
| Gilbert to Oer-Erkenschwick | 5,505.04 mi (8,859.51 km) |
