| Enfield Lock to Oberkirch | 419.28 mi (674.77 km) |
| Enfield Lock to Obernburg am Main | 419.83 mi (675.66 km) |
| Enfield Lock to Obernkirchen | 391.16 mi (629.51 km) |
| Enfield Lock to Oberschleissheim | 566.02 mi (910.92 km) |
| Enfield Lock to Oberstdorf | 547.03 mi (880.36 km) |
| Enfield Lock to Obertraubling | 568.61 mi (915.08 km) |
| Enfield Lock to Obertshausen | 401.57 mi (646.26 km) |
| Enfield Lock to Oberursel | 387.77 mi (624.05 km) |
| Enfield Lock to Ochsenfurt | 463.10 mi (745.28 km) |
| Enfield Lock to Ochsenhausen | 508.33 mi (818.08 km) |
| Enfield Lock to Ochtrup | 309.50 mi (498.09 km) |
| Enfield Lock to Odenthal | 311.20 mi (500.83 km) |
| Enfield Lock to Oelde | 349.72 mi (562.83 km) |
| Enfield Lock to Oelsnitz | 536.03 mi (862.66 km) |
| Enfield Lock to Oer-Erkenschwick | 311.79 mi (501.79 km) |
