| Effingham to Cocentaina | 4,524.98 mi (7,282.25 km) |
| Effingham to Coin | 4,397.24 mi (7,076.67 km) |
| Effingham to Colindres | 4,229.12 mi (6,806.10 km) |
| Effingham to Collado-Villalba | 4,295.39 mi (6,912.76 km) |
| Effingham to Colmenar Viejo | 4,305.62 mi (6,929.23 km) |
| Effingham to Colmenarejo | 4,297.44 mi (6,916.06 km) |
| Effingham to Conil de la Frontera | 4,347.35 mi (6,996.38 km) |
| Effingham to Consuegra | 4,353.75 mi (7,006.69 km) |
| Effingham to Corbera de Llobregat | 4,535.15 mi (7,298.62 km) |
| Effingham to Cordoba | 4,353.35 mi (7,006.03 km) |
| Effingham to Coria del Rio | 4,313.79 mi (6,942.37 km) |
| Effingham to Crevillente | 4,525.96 mi (7,283.83 km) |
| Effingham to Cuarte de Huerva | 4,402.78 mi (7,085.59 km) |
| Effingham to Cubellas | 4,531.24 mi (7,292.33 km) |
| Effingham to Cuellar | 4,255.82 mi (6,849.08 km) |
