| Langenfeld to Oestrich-Winkel | 89.87 mi (144.63 km) |
| Langenfeld to Offenburg | 188.27 mi (302.99 km) |
| Langenfeld to Oftersheim | 140.61 mi (226.28 km) |
| Langenfeld to Ohrdruf | 165.77 mi (266.77 km) |
| Langenfeld to Ohringen | 173.99 mi (280.01 km) |
| Langenfeld to Olbernhau | 279.85 mi (450.37 km) |
| Langenfeld to Olching | 280.54 mi (451.49 km) |
| Langenfeld to Oldenburg | 149.97 mi (241.35 km) |
| Langenfeld to Oldenburg in Holstein | 274.66 mi (442.02 km) |
| Langenfeld to Olfen | 45.47 mi (73.17 km) |
| Langenfeld to Olpe | 38.97 mi (62.72 km) |
| Langenfeld to Olsberg | 68.26 mi (109.86 km) |
| Langenfeld to Oranienburg | 290.61 mi (467.70 km) |
| Langenfeld to Ortenberg | 106.01 mi (170.61 km) |
| Langenfeld to Oschatz | 266.74 mi (429.28 km) |
