| Sleaford to Ickenham | 99.37 mi (159.92 km) |
| Sleaford to Ifield | 129.68 mi (208.70 km) |
| Sleaford to Ilford | 101.60 mi (163.51 km) |
| Sleaford to Ilfracombe | 199.99 mi (321.86 km) |
| Sleaford to Ilkeston | 37.31 mi (60.05 km) |
| Sleaford to Ilkley | 86.48 mi (139.18 km) |
| Sleaford to Immingham | 43.44 mi (69.91 km) |
| Sleaford to Ince-in-Makerfield | 97.84 mi (157.46 km) |
| Sleaford to Inverness | 344.02 mi (553.65 km) |
| Sleaford to Inverurie | 305.99 mi (492.44 km) |
| Sleaford to Ipswich | 92.38 mi (148.68 km) |
| Sleaford to Irlam | 88.71 mi (142.76 km) |
| Sleaford to Irthlingborough | 47.19 mi (75.94 km) |
| Sleaford to Irvine | 249.31 mi (401.23 km) |
| Sleaford to Islington | 101.18 mi (162.83 km) |
