| Richardson to Cortona | 5,512.92 mi (8,872.19 km) |
| Richardson to Cosenza | 5,855.82 mi (9,424.03 km) |
| Richardson to Cossato | 5,267.78 mi (8,477.68 km) |
| Richardson to Costa Volpino | 5,334.92 mi (8,585.72 km) |
| Richardson to Creazzo | 5,401.42 mi (8,692.75 km) |
| Richardson to Crema | 5,336.49 mi (8,588.25 km) |
| Richardson to Cremona | 5,359.65 mi (8,625.53 km) |
| Richardson to Crevalcore | 5,420.91 mi (8,724.11 km) |
| Richardson to Crispiano | 5,839.10 mi (9,397.13 km) |
| Richardson to Crosia | 5,865.50 mi (9,439.62 km) |
| Richardson to Crotone | 5,901.19 mi (9,497.05 km) |
| Richardson to Cuneo | 5,287.54 mi (8,509.47 km) |
| Richardson to Cuorgne | 5,253.55 mi (8,454.77 km) |
| Richardson to Cusano Milanino | 5,309.33 mi (8,544.54 km) |
| Richardson to Cutro | 5,897.87 mi (9,491.70 km) |
