| Letchworth to Oberkirch | 437.22 mi (703.63 km) |
| Letchworth to Obernburg am Main | 433.80 mi (698.14 km) |
| Letchworth to Obernkirchen | 396.78 mi (638.55 km) |
| Letchworth to Oberschleissheim | 581.77 mi (936.27 km) |
| Letchworth to Oberstdorf | 565.05 mi (909.37 km) |
| Letchworth to Obertraubling | 582.62 mi (937.64 km) |
| Letchworth to Obertshausen | 415.11 mi (668.06 km) |
| Letchworth to Oberursel | 401.08 mi (645.48 km) |
| Letchworth to Ochsenfurt | 476.92 mi (767.53 km) |
| Letchworth to Ochsenhausen | 525.56 mi (845.81 km) |
| Letchworth to Ochtrup | 315.25 mi (507.35 km) |
| Letchworth to Odenthal | 322.48 mi (518.97 km) |
| Letchworth to Oelde | 357.16 mi (574.80 km) |
| Letchworth to Oelsnitz | 546.75 mi (879.91 km) |
| Letchworth to Oer-Erkenschwick | 320.27 mi (515.42 km) |
