| Langenfeld to Obernburg am Main | 130.62 mi (210.22 km) |
| Langenfeld to Obernkirchen | 122.18 mi (196.63 km) |
| Langenfeld to Oberschleissheim | 285.95 mi (460.19 km) |
| Langenfeld to Oberstdorf | 296.80 mi (477.66 km) |
| Langenfeld to Obertraubling | 274.99 mi (442.56 km) |
| Langenfeld to Obertshausen | 109.94 mi (176.92 km) |
| Langenfeld to Oberursel | 95.18 mi (153.18 km) |
| Langenfeld to Ochsenfurt | 170.63 mi (274.61 km) |
| Langenfeld to Ochsenhausen | 249.51 mi (401.54 km) |
| Langenfeld to Ochtrup | 75.94 mi (122.21 km) |
| Langenfeld to Odenthal | 9.25 mi (14.89 km) |
| Langenfeld to Oelde | 71.54 mi (115.13 km) |
| Langenfeld to Oelsnitz | 232.99 mi (374.96 km) |
| Langenfeld to Oer-Erkenschwick | 38.56 mi (62.05 km) |
| Langenfeld to Oerlinghausen | 94.29 mi (151.74 km) |
