| Hammersmith to Oberkirch | 421.34 mi (678.08 km) |
| Hammersmith to Obernburg am Main | 425.36 mi (684.55 km) |
| Hammersmith to Obernkirchen | 401.68 mi (646.45 km) |
| Hammersmith to Oberschleissheim | 569.98 mi (917.29 km) |
| Hammersmith to Oberstdorf | 548.88 mi (883.34 km) |
| Hammersmith to Obertraubling | 573.96 mi (923.71 km) |
| Hammersmith to Obertshausen | 407.44 mi (655.71 km) |
| Hammersmith to Oberursel | 393.82 mi (633.80 km) |
| Hammersmith to Ochsenfurt | 468.69 mi (754.28 km) |
| Hammersmith to Ochsenhausen | 511.00 mi (822.37 km) |
| Hammersmith to Ochtrup | 320.07 mi (515.10 km) |
| Hammersmith to Odenthal | 318.77 mi (513.02 km) |
| Hammersmith to Oelde | 359.41 mi (578.42 km) |
| Hammersmith to Oelsnitz | 543.68 mi (874.96 km) |
| Hammersmith to Oer-Erkenschwick | 321.01 mi (516.61 km) |
