| Sleaford to Ilawa | 823.35 mi (1,325.06 km) |
| Sleaford to Imielin | 863.03 mi (1,388.92 km) |
| Sleaford to Inowroclaw | 776.32 mi (1,249.36 km) |
| Sleaford to Janow Lubelski | 982.57 mi (1,581.29 km) |
| Sleaford to Jarocin | 755.12 mi (1,215.25 km) |
| Sleaford to Jaroslaw | 1,009.50 mi (1,624.63 km) |
| Sleaford to Jasien | 779.79 mi (1,254.95 km) |
| Sleaford to Jaslo | 966.12 mi (1,554.81 km) |
| Sleaford to Jastrzebie-Zdroj | 841.44 mi (1,354.16 km) |
| Sleaford to Jawor | 717.29 mi (1,154.37 km) |
| Sleaford to Jaworzno | 863.51 mi (1,389.68 km) |
| Sleaford to Jedrzejow | 896.37 mi (1,442.57 km) |
| Sleaford to Jelcz-Laskowice | 764.67 mi (1,230.62 km) |
| Sleaford to Jelenia Gora | 701.08 mi (1,128.29 km) |
| Sleaford to Jozefoslaw | 900.35 mi (1,448.98 km) |
