| Sleaford to Indianola (Iowa) | 4,132.37 mi (6,650.40 km) |
| Sleaford to Indio (California) | 5,318.03 mi (8,558.54 km) |
| Sleaford to Inglewood (California) | 5,371.83 mi (8,645.13 km) |
| Sleaford to Inkster (Michigan) | 3,708.36 mi (5,968.02 km) |
| Sleaford to Inver Grove Heights (Minnesota) | 3,944.88 mi (6,348.67 km) |
| Sleaford to Inwood (New York) | 3,412.43 mi (5,491.77 km) |
| Sleaford to Iona (Florida) | 4,433.74 mi (7,135.42 km) |
| Sleaford to Ionia (Michigan) | 3,742.74 mi (6,023.36 km) |
| Sleaford to Iowa City (Iowa) | 4,044.18 mi (6,508.47 km) |
| Sleaford to Irmo (South Carolina) | 4,018.35 mi (6,466.91 km) |
| Sleaford to Irondale (Alabama) | 4,262.95 mi (6,860.55 km) |
| Sleaford to Ironton (Ohio) | 3,861.27 mi (6,214.12 km) |
| Sleaford to Irvine (California) | 5,370.14 mi (8,642.40 km) |
| Sleaford to Irving (Texas) | 4,694.30 mi (7,554.75 km) |
| Sleaford to Isabela (Puerto Rico) | 4,236.50 mi (6,817.99 km) |
