| Pittsburgh to Cocentaina | 4,082.35 mi (6,569.91 km) |
| Pittsburgh to Coin | 3,945.95 mi (6,350.39 km) |
| Pittsburgh to Colindres | 3,795.73 mi (6,108.64 km) |
| Pittsburgh to Collado-Villalba | 3,853.64 mi (6,201.83 km) |
| Pittsburgh to Colmenar Viejo | 3,864.19 mi (6,218.81 km) |
| Pittsburgh to Colmenarejo | 3,855.49 mi (6,204.81 km) |
| Pittsburgh to Conil de la Frontera | 3,894.21 mi (6,267.13 km) |
| Pittsburgh to Consuegra | 3,909.52 mi (6,291.76 km) |
| Pittsburgh to Corbera de Llobregat | 4,102.28 mi (6,601.99 km) |
| Pittsburgh to Cordoba | 3,904.45 mi (6,283.61 km) |
| Pittsburgh to Coria del Rio | 3,862.57 mi (6,216.20 km) |
| Pittsburgh to Crevillente | 4,081.78 mi (6,569.00 km) |
| Pittsburgh to Cuarte de Huerva | 3,966.96 mi (6,384.21 km) |
| Pittsburgh to Cubellas | 4,097.47 mi (6,594.24 km) |
| Pittsburgh to Cuellar | 3,815.77 mi (6,140.89 km) |
