| Sleaford to Caguas (Puerto Rico) | 4,210.34 mi (6,775.89 km) |
| Sleaford to Cahokia (Illinois) | 4,146.68 mi (6,673.43 km) |
| Sleaford to Calabasas (California) | 5,371.43 mi (8,644.48 km) |
| Sleaford to Caldwell (Idaho) | 4,766.55 mi (7,671.02 km) |
| Sleaford to Caledonia (Wisconsin) | 3,855.18 mi (6,204.32 km) |
| Sleaford to Calera (Alabama) | 4,287.43 mi (6,899.96 km) |
| Sleaford to Calexico (California) | 5,354.41 mi (8,617.09 km) |
| Sleaford to Calhoun (Georgia) | 4,147.65 mi (6,675.00 km) |
| Sleaford to California (Maryland) | 3,628.53 mi (5,839.55 km) |
| Sleaford to California City (California) | 5,287.64 mi (8,509.64 km) |
| Sleaford to Callaway (Florida) | 4,392.77 mi (7,069.48 km) |
| Sleaford to Calumet City (Illinois) | 3,899.58 mi (6,275.77 km) |
| Sleaford to Calverton (Maryland) | 3,611.13 mi (5,811.56 km) |
| Sleaford to Camano (Washington) | 4,665.78 mi (7,508.84 km) |
| Sleaford to Camarillo (California) | 5,377.71 mi (8,654.58 km) |
