| Kastamonu to Ilawa | 1,069.70 mi (1,721.51 km) |
| Kastamonu to Imielin | 923.79 mi (1,486.69 km) |
| Kastamonu to Inowroclaw | 1,070.24 mi (1,722.38 km) |
| Kastamonu to Janow Lubelski | 842.59 mi (1,356.02 km) |
| Kastamonu to Jarocin | 1,058.94 mi (1,704.19 km) |
| Kastamonu to Jaroslaw | 800.37 mi (1,288.08 km) |
| Kastamonu to Jasien | 1,135.05 mi (1,826.69 km) |
| Kastamonu to Jaslo | 828.00 mi (1,332.54 km) |
| Kastamonu to Jastrzebie-Zdroj | 939.87 mi (1,512.58 km) |
| Kastamonu to Jawor | 1,069.04 mi (1,720.46 km) |
| Kastamonu to Jaworzno | 924.72 mi (1,488.20 km) |
| Kastamonu to Jedrzejow | 906.94 mi (1,459.57 km) |
| Kastamonu to Jelcz-Laskowice | 1,027.12 mi (1,652.98 km) |
| Kastamonu to Jelenia Gora | 1,081.13 mi (1,739.91 km) |
| Kastamonu to Jozefoslaw | 952.33 mi (1,532.62 km) |
