| Langenfeld to Isny im Allgau | 274.33 mi (441.49 km) |
| Langenfeld to Isselburg | 53.69 mi (86.41 km) |
| Langenfeld to Issum | 36.98 mi (59.51 km) |
| Langenfeld to Itzehoe | 221.98 mi (357.24 km) |
| Langenfeld to Jena | 201.88 mi (324.90 km) |
| Langenfeld to Jever | 174.48 mi (280.81 km) |
| Langenfeld to Jork | 202.97 mi (326.65 km) |
| Langenfeld to Juchen | 19.48 mi (31.35 km) |
| Langenfeld to Julich | 29.02 mi (46.70 km) |
| Langenfeld to Juterbog | 269.83 mi (434.25 km) |
| Langenfeld to Kaarst | 16.01 mi (25.76 km) |
| Langenfeld to Kaiserslautern | 121.05 mi (194.81 km) |
| Langenfeld to Kalkar | 51.48 mi (82.85 km) |
| Langenfeld to Kall | 42.89 mi (69.03 km) |
| Langenfeld to Kaltenkirchen | 226.77 mi (364.95 km) |
