| Philadelphia to Cocentaina | 3,865.07 mi (6,220.24 km) |
| Philadelphia to Coin | 3,719.36 mi (5,985.73 km) |
| Philadelphia to Colindres | 3,588.22 mi (5,774.69 km) |
| Philadelphia to Collado-Villalba | 3,637.67 mi (5,854.26 km) |
| Philadelphia to Colmenar Viejo | 3,648.53 mi (5,871.74 km) |
| Philadelphia to Colmenarejo | 3,639.32 mi (5,856.91 km) |
| Philadelphia to Conil de la Frontera | 3,665.45 mi (5,898.98 km) |
| Philadelphia to Consuegra | 3,690.84 mi (5,939.84 km) |
| Philadelphia to Corbera de Llobregat | 3,894.60 mi (6,267.75 km) |
| Philadelphia to Cordoba | 3,680.69 mi (5,923.50 km) |
| Philadelphia to Coria del Rio | 3,636.16 mi (5,851.84 km) |
| Philadelphia to Crevillente | 3,862.89 mi (6,216.72 km) |
| Philadelphia to Cuarte de Huerva | 3,756.72 mi (6,045.86 km) |
| Philadelphia to Cubellas | 3,888.93 mi (6,258.63 km) |
| Philadelphia to Cuellar | 3,601.62 mi (5,796.24 km) |
