| Widnes to Cocentaina | 1,015.81 mi (1,634.78 km) |
| Widnes to Coin | 1,157.70 mi (1,863.14 km) |
| Widnes to Colindres | 689.39 mi (1,109.46 km) |
| Widnes to Collado-Villalba | 881.57 mi (1,418.74 km) |
| Widnes to Colmenar Viejo | 879.10 mi (1,414.78 km) |
| Widnes to Colmenarejo | 886.59 mi (1,426.83 km) |
| Widnes to Conil de la Frontera | 1,192.30 mi (1,918.82 km) |
| Widnes to Consuegra | 961.36 mi (1,547.17 km) |
| Widnes to Corbera de Llobregat | 853.22 mi (1,373.12 km) |
| Widnes to Cordoba | 1,073.93 mi (1,728.32 km) |
| Widnes to Coria del Rio | 1,122.35 mi (1,806.24 km) |
| Widnes to Crevillente | 1,048.29 mi (1,687.06 km) |
| Widnes to Cuarte de Huerva | 818.21 mi (1,316.78 km) |
| Widnes to Cubellas | 864.24 mi (1,390.85 km) |
| Widnes to Cuellar | 829.77 mi (1,335.38 km) |
