| Sleaford to Cortona | 879.56 mi (1,415.51 km) |
| Sleaford to Cosenza | 1,231.44 mi (1,981.80 km) |
| Sleaford to Cossato | 641.73 mi (1,032.76 km) |
| Sleaford to Costa Volpino | 683.05 mi (1,099.27 km) |
| Sleaford to Creazzo | 742.24 mi (1,194.52 km) |
| Sleaford to Crema | 695.66 mi (1,119.56 km) |
| Sleaford to Cremona | 718.80 mi (1,156.79 km) |
| Sleaford to Crevalcore | 775.01 mi (1,247.26 km) |
| Sleaford to Crispiano | 1,189.66 mi (1,914.58 km) |
| Sleaford to Crosia | 1,232.10 mi (1,982.88 km) |
| Sleaford to Crotone | 1,270.17 mi (2,044.14 km) |
| Sleaford to Cuneo | 696.20 mi (1,120.43 km) |
| Sleaford to Cuorgne | 638.46 mi (1,027.51 km) |
| Sleaford to Cusano Milanino | 671.00 mi (1,079.87 km) |
| Sleaford to Cutro | 1,268.91 mi (2,042.11 km) |
