| Sleaford to Cascais | 1,076.64 mi (1,732.68 km) |
| Sleaford to Castelo Branco | 970.02 mi (1,561.10 km) |
| Sleaford to Castro Daire | 906.71 mi (1,459.21 km) |
| Sleaford to Celorico de Basto | 876.72 mi (1,410.94 km) |
| Sleaford to Chamusca | 1,017.31 mi (1,637.20 km) |
| Sleaford to Chaves | 843.92 mi (1,358.16 km) |
| Sleaford to Cinfaes | 897.47 mi (1,444.34 km) |
| Sleaford to Coimbra | 960.40 mi (1,545.61 km) |
| Sleaford to Condeixa-a-Nova | 967.81 mi (1,557.55 km) |
| Sleaford to Corroios | 1,077.21 mi (1,733.61 km) |
| Sleaford to Coruche | 1,043.73 mi (1,679.71 km) |
| Sleaford to Costa de Caparica | 1,076.84 mi (1,733.00 km) |
| Sleaford to Covilha | 939.38 mi (1,511.79 km) |
| Sleaford to Eiras | 958.29 mi (1,542.23 km) |
| Sleaford to Elvas | 1,027.40 mi (1,653.45 km) |
