| Great Sankey to Oberkirch | 573.82 mi (923.47 km) |
| Great Sankey to Obernburg am Main | 560.89 mi (902.67 km) |
| Great Sankey to Obernkirchen | 496.30 mi (798.72 km) |
| Great Sankey to Oberschleissheim | 712.78 mi (1,147.11 km) |
| Great Sankey to Oberstdorf | 701.49 mi (1,128.94 km) |
| Great Sankey to Obertraubling | 708.67 mi (1,140.49 km) |
| Great Sankey to Obertshausen | 541.20 mi (870.98 km) |
| Great Sankey to Oberursel | 526.68 mi (847.61 km) |
| Great Sankey to Ochsenfurt | 603.18 mi (970.73 km) |
| Great Sankey to Ochsenhausen | 660.41 mi (1,062.83 km) |
| Great Sankey to Ochtrup | 418.33 mi (673.24 km) |
| Great Sankey to Odenthal | 443.52 mi (713.78 km) |
| Great Sankey to Oelde | 464.75 mi (747.94 km) |
| Great Sankey to Oelsnitz | 662.32 mi (1,065.90 km) |
| Great Sankey to Oer-Erkenschwick | 432.60 mi (696.20 km) |
