| Willebroek to Imielin | 653.32 mi (1,051.41 km) |
| Willebroek to Inowroclaw | 602.85 mi (970.20 km) |
| Willebroek to Janow Lubelski | 785.08 mi (1,263.46 km) |
| Willebroek to Jarocin | 567.30 mi (912.99 km) |
| Willebroek to Jaroslaw | 805.26 mi (1,295.94 km) |
| Willebroek to Jasien | 634.44 mi (1,021.03 km) |
| Willebroek to Jaslo | 756.96 mi (1,218.20 km) |
| Willebroek to Jastrzebie-Zdroj | 628.44 mi (1,011.37 km) |
| Willebroek to Jawor | 513.33 mi (826.13 km) |
| Willebroek to Jaworzno | 654.68 mi (1,053.61 km) |
| Willebroek to Jedrzejow | 694.33 mi (1,117.42 km) |
| Willebroek to Jelcz-Laskowice | 562.48 mi (905.22 km) |
| Willebroek to Jelenia Gora | 494.09 mi (795.15 km) |
| Willebroek to Jozefoslaw | 718.05 mi (1,155.59 km) |
| Willebroek to Jozefow | 725.95 mi (1,168.30 km) |
