| Canals to Oberkirch | 789.18 mi (1,270.06 km) |
| Canals to Obernburg am Main | 890.26 mi (1,432.74 km) |
| Canals to Obernkirchen | 1,029.89 mi (1,657.44 km) |
| Canals to Oberschleissheim | 881.96 mi (1,419.37 km) |
| Canals to Oberstdorf | 798.70 mi (1,285.38 km) |
| Canals to Obertraubling | 935.60 mi (1,505.70 km) |
| Canals to Obertshausen | 895.12 mi (1,440.55 km) |
| Canals to Oberursel | 896.59 mi (1,442.92 km) |
| Canals to Ochsenfurt | 905.16 mi (1,456.71 km) |
| Canals to Ochsenhausen | 819.92 mi (1,319.53 km) |
| Canals to Ochtrup | 987.96 mi (1,589.97 km) |
| Canals to Odenthal | 913.85 mi (1,470.70 km) |
| Canals to Oelde | 983.53 mi (1,582.84 km) |
| Canals to Oelsnitz | 1,006.41 mi (1,619.67 km) |
| Canals to Oer-Erkenschwick | 954.03 mi (1,535.37 km) |
