| Portici to Imielin | 685.11 mi (1,102.58 km) |
| Portici to Inowroclaw | 847.47 mi (1,363.87 km) |
| Portici to Janow Lubelski | 785.75 mi (1,264.53 km) |
| Portici to Jarocin | 784.56 mi (1,262.62 km) |
| Portici to Jaroslaw | 752.28 mi (1,210.67 km) |
| Portici to Jasien | 954.19 mi (1,535.62 km) |
| Portici to Jaslo | 706.84 mi (1,137.54 km) |
| Portici to Jastrzebie-Zdroj | 663.30 mi (1,067.48 km) |
| Portici to Jawor | 712.40 mi (1,146.50 km) |
| Portici to Jaworzno | 690.55 mi (1,111.33 km) |
| Portici to Jedrzejow | 735.86 mi (1,184.25 km) |
| Portici to Jelcz-Laskowice | 720.03 mi (1,158.78 km) |
| Portici to Jelenia Gora | 699.89 mi (1,126.37 km) |
| Portici to Jozefoslaw | 841.35 mi (1,354.02 km) |
| Portici to Jozefow | 846.76 mi (1,362.73 km) |
