| Sleaford to Imola | 811.97 mi (1,306.74 km) |
| Sleaford to Impruneta | 835.08 mi (1,343.93 km) |
| Sleaford to Induno Olona | 644.29 mi (1,036.89 km) |
| Sleaford to Inverigo | 661.84 mi (1,065.12 km) |
| Sleaford to Inveruno | 663.38 mi (1,067.61 km) |
| Sleaford to Inzago | 680.63 mi (1,095.37 km) |
| Sleaford to Iseo | 690.84 mi (1,111.80 km) |
| Sleaford to Isernia | 1,040.50 mi (1,674.52 km) |
| Sleaford to Isola Capo Rizzuto | 1,276.57 mi (2,054.43 km) |
| Sleaford to Isola del Liri | 1,016.23 mi (1,635.46 km) |
| Sleaford to Isola della Scala | 741.08 mi (1,192.66 km) |
| Sleaford to Isola Vicentina | 736.02 mi (1,184.51 km) |
| Sleaford to Ispica | 1,341.66 mi (2,159.19 km) |
| Sleaford to Istrana | 754.79 mi (1,214.72 km) |
| Sleaford to Itri | 1,037.63 mi (1,669.90 km) |
