| Sleaford to Brezovica | 819.01 mi (1,318.07 km) |
| Sleaford to Cankova | 847.82 mi (1,364.44 km) |
| Sleaford to Celje | 840.35 mi (1,352.41 km) |
| Sleaford to Cerklje na Gorenjskem | 811.13 mi (1,305.39 km) |
| Sleaford to Cerknica | 827.21 mi (1,331.27 km) |
| Sleaford to Cerkno | 798.78 mi (1,285.52 km) |
| Sleaford to Cerkvenjak | 851.37 mi (1,370.15 km) |
| Sleaford to Cirkulane | 862.71 mi (1,388.40 km) |
| Sleaford to Crensovci | 864.28 mi (1,390.93 km) |
| Sleaford to Crna na Koroskem | 814.67 mi (1,311.08 km) |
| Sleaford to Crnomelj | 867.41 mi (1,395.96 km) |
| Sleaford to Destrnik | 852.11 mi (1,371.34 km) |
| Sleaford to Divaca | 818.85 mi (1,317.82 km) |
| Sleaford to Dobje | 849.38 mi (1,366.95 km) |
| Sleaford to Dobrna | 834.46 mi (1,342.93 km) |
