| Philadelphia to Cortona | 4,287.21 mi (6,899.60 km) |
| Philadelphia to Cosenza | 4,620.01 mi (7,435.18 km) |
| Philadelphia to Cossato | 4,046.02 mi (6,511.44 km) |
| Philadelphia to Costa Volpino | 4,120.47 mi (6,631.26 km) |
| Philadelphia to Creazzo | 4,189.05 mi (6,741.63 km) |
| Philadelphia to Crema | 4,117.64 mi (6,626.70 km) |
| Philadelphia to Cremona | 4,140.24 mi (6,663.07 km) |
| Philadelphia to Crevalcore | 4,201.98 mi (6,762.43 km) |
| Philadelphia to Crispiano | 4,613.65 mi (7,424.95 km) |
| Philadelphia to Crosia | 4,632.73 mi (7,455.65 km) |
| Philadelphia to Crotone | 4,666.89 mi (7,510.63 km) |
| Philadelphia to Cuneo | 4,056.41 mi (6,528.16 km) |
| Philadelphia to Cuorgne | 4,029.20 mi (6,484.37 km) |
| Philadelphia to Cusano Milanino | 4,090.30 mi (6,582.69 km) |
| Philadelphia to Cutro | 4,662.88 mi (7,504.18 km) |
