| Grefrath to Imielin | 568.40 mi (914.76 km) |
| Grefrath to Inowroclaw | 515.60 mi (829.78 km) |
| Grefrath to Janow Lubelski | 698.52 mi (1,124.15 km) |
| Grefrath to Jarocin | 479.88 mi (772.29 km) |
| Grefrath to Jaroslaw | 719.61 mi (1,158.11 km) |
| Grefrath to Jasien | 549.70 mi (884.65 km) |
| Grefrath to Jaslo | 672.13 mi (1,081.69 km) |
| Grefrath to Jastrzebie-Zdroj | 544.22 mi (875.84 km) |
| Grefrath to Jawor | 427.04 mi (687.26 km) |
| Grefrath to Jaworzno | 569.59 mi (916.66 km) |
| Grefrath to Jedrzejow | 608.18 mi (978.78 km) |
| Grefrath to Jelcz-Laskowice | 476.08 mi (766.18 km) |
| Grefrath to Jelenia Gora | 408.21 mi (656.95 km) |
| Grefrath to Jozefoslaw | 630.59 mi (1,014.84 km) |
| Grefrath to Jozefow | 638.49 mi (1,027.54 km) |
