| Pittsburgh to Cortona | 4,477.77 mi (7,206.28 km) |
| Pittsburgh to Cosenza | 4,815.68 mi (7,750.09 km) |
| Pittsburgh to Cossato | 4,234.43 mi (6,814.65 km) |
| Pittsburgh to Costa Volpino | 4,305.75 mi (6,929.44 km) |
| Pittsburgh to Creazzo | 4,373.55 mi (7,038.55 km) |
| Pittsburgh to Crema | 4,304.85 mi (6,927.99 km) |
| Pittsburgh to Cremona | 4,327.74 mi (6,964.83 km) |
| Pittsburgh to Crevalcore | 4,389.37 mi (7,064.00 km) |
| Pittsburgh to Crispiano | 4,804.55 mi (7,732.18 km) |
| Pittsburgh to Crosia | 4,826.99 mi (7,768.29 km) |
| Pittsburgh to Crotone | 4,861.91 mi (7,824.48 km) |
| Pittsburgh to Cuneo | 4,249.16 mi (6,838.36 km) |
| Pittsburgh to Cuorgne | 4,218.76 mi (6,789.43 km) |
| Pittsburgh to Cusano Milanino | 4,277.55 mi (6,884.05 km) |
| Pittsburgh to Cutro | 4,858.21 mi (7,818.54 km) |
