| Sleaford to Campo de Criptana | 948.07 mi (1,525.77 km) |
| Sleaford to Campos del Puerto | 951.25 mi (1,530.89 km) |
| Sleaford to Canals | 969.75 mi (1,560.67 km) |
| Sleaford to Candelaria | 1,887.05 mi (3,036.91 km) |
| Sleaford to Canet de Mar | 800.22 mi (1,287.84 km) |
| Sleaford to Cangas | 836.34 mi (1,345.96 km) |
| Sleaford to Cangas de Narcea | 734.69 mi (1,182.37 km) |
| Sleaford to Canovellas | 796.09 mi (1,281.18 km) |
| Sleaford to Canteras | 1,063.35 mi (1,711.29 km) |
| Sleaford to Cantillana | 1,094.92 mi (1,762.10 km) |
| Sleaford to Capdepera | 936.45 mi (1,507.07 km) |
| Sleaford to Carballo | 774.81 mi (1,246.93 km) |
| Sleaford to Carcagente | 958.59 mi (1,542.70 km) |
| Sleaford to Cardedeu | 795.10 mi (1,279.59 km) |
| Sleaford to Carlet | 951.40 mi (1,531.13 km) |
