| Delaware to Cortona | 4,614.16 mi (7,425.77 km) |
| Delaware to Cosenza | 4,954.39 mi (7,973.32 km) |
| Delaware to Cossato | 4,369.95 mi (7,032.75 km) |
| Delaware to Costa Volpino | 4,439.60 mi (7,144.84 km) |
| Delaware to Creazzo | 4,506.92 mi (7,253.18 km) |
| Delaware to Crema | 4,439.69 mi (7,145.00 km) |
| Delaware to Cremona | 4,462.71 mi (7,182.03 km) |
| Delaware to Crevalcore | 4,524.21 mi (7,281.01 km) |
| Delaware to Crispiano | 4,940.82 mi (7,951.48 km) |
| Delaware to Crosia | 4,964.97 mi (7,990.35 km) |
| Delaware to Crotone | 5,000.24 mi (8,047.11 km) |
| Delaware to Cuneo | 4,386.87 mi (7,059.98 km) |
| Delaware to Cuorgne | 4,354.88 mi (7,008.50 km) |
| Delaware to Cusano Milanino | 4,412.43 mi (7,101.13 km) |
| Delaware to Cutro | 4,996.72 mi (8,041.44 km) |
