| Rio Grande City to Cortona | 5,929.64 mi (9,542.83 km) |
| Rio Grande City to Cosenza | 6,267.22 mi (10,086.11 km) |
| Rio Grande City to Cossato | 5,686.16 mi (9,150.99 km) |
| Rio Grande City to Costa Volpino | 5,756.93 mi (9,264.88 km) |
| Rio Grande City to Creazzo | 5,824.50 mi (9,373.63 km) |
| Rio Grande City to Crema | 5,756.41 mi (9,264.05 km) |
| Rio Grande City to Cremona | 5,779.34 mi (9,300.95 km) |
| Rio Grande City to Crevalcore | 5,840.93 mi (9,400.07 km) |
| Rio Grande City to Crispiano | 6,256.42 mi (10,068.73 km) |
| Rio Grande City to Crosia | 6,278.74 mi (10,104.65 km) |
| Rio Grande City to Crotone | 6,313.56 mi (10,160.69 km) |
| Rio Grande City to Cuneo | 5,700.99 mi (9,174.85 km) |
| Rio Grande City to Cuorgne | 5,670.59 mi (9,125.94 km) |
| Rio Grande City to Cusano Milanino | 5,729.12 mi (9,220.13 km) |
| Rio Grande City to Cutro | 6,309.82 mi (10,154.67 km) |
