| Fort Oglethorpe to Oberkirch | 4,599.90 mi (7,402.82 km) |
| Fort Oglethorpe to Obernburg am Main | 4,601.56 mi (7,405.49 km) |
| Fort Oglethorpe to Obernkirchen | 4,525.70 mi (7,283.40 km) |
| Fort Oglethorpe to Oberschleissheim | 4,750.18 mi (7,644.67 km) |
| Fort Oglethorpe to Oberstdorf | 4,725.94 mi (7,605.66 km) |
| Fort Oglethorpe to Obertraubling | 4,749.98 mi (7,644.35 km) |
| Fort Oglethorpe to Obertshausen | 4,582.26 mi (7,374.43 km) |
| Fort Oglethorpe to Oberursel | 4,567.88 mi (7,351.29 km) |
| Fort Oglethorpe to Ochsenfurt | 4,644.28 mi (7,474.25 km) |
| Fort Oglethorpe to Ochsenhausen | 4,690.62 mi (7,548.82 km) |
| Fort Oglethorpe to Ochtrup | 4,453.84 mi (7,167.77 km) |
| Fort Oglethorpe to Odenthal | 4,485.25 mi (7,218.31 km) |
| Fort Oglethorpe to Oelde | 4,501.72 mi (7,244.82 km) |
| Fort Oglethorpe to Oelsnitz | 4,701.34 mi (7,566.07 km) |
| Fort Oglethorpe to Oer-Erkenschwick | 4,472.60 mi (7,197.95 km) |
