| Sleaford to Caldicot | 138.44 mi (222.80 km) |
| Sleaford to Calne | 127.00 mi (204.38 km) |
| Sleaford to Cam | 121.59 mi (195.68 km) |
| Sleaford to Camberley | 115.61 mi (186.05 km) |
| Sleaford to Camborne | 284.41 mi (457.71 km) |
| Sleaford to Cambridge | 59.02 mi (94.98 km) |
| Sleaford to Cambuslang | 246.57 mi (396.82 km) |
| Sleaford to Canford Cliffs | 171.33 mi (275.73 km) |
| Sleaford to Cannock | 70.57 mi (113.58 km) |
| Sleaford to Canterbury | 134.40 mi (216.30 km) |
| Sleaford to Carlisle | 166.52 mi (267.99 km) |
| Sleaford to Carlton Colville | 95.67 mi (153.97 km) |
| Sleaford to Carluke | 233.93 mi (376.48 km) |
| Sleaford to Carnoustie | 258.88 mi (416.63 km) |
| Sleaford to Carshalton | 113.16 mi (182.11 km) |
