| Gloucester to Cocentaina | 910.62 mi (1,465.49 km) |
| Gloucester to Coin | 1,057.19 mi (1,701.38 km) |
| Gloucester to Colindres | 587.72 mi (945.84 km) |
| Gloucester to Collado-Villalba | 780.49 mi (1,256.08 km) |
| Gloucester to Colmenar Viejo | 777.58 mi (1,251.40 km) |
| Gloucester to Colmenarejo | 785.52 mi (1,264.18 km) |
| Gloucester to Conil de la Frontera | 1,094.02 mi (1,760.66 km) |
| Gloucester to Consuegra | 859.41 mi (1,383.08 km) |
| Gloucester to Corbera de Llobregat | 748.21 mi (1,204.14 km) |
| Gloucester to Cordoba | 973.70 mi (1,567.02 km) |
| Gloucester to Coria del Rio | 1,024.35 mi (1,648.54 km) |
| Gloucester to Crevillente | 943.32 mi (1,518.12 km) |
| Gloucester to Cuarte de Huerva | 713.10 mi (1,147.62 km) |
| Gloucester to Cubellas | 759.04 mi (1,221.56 km) |
| Gloucester to Cuellar | 729.51 mi (1,174.04 km) |
