| Knightdale to Cortona | 4,606.95 mi (7,414.17 km) |
| Knightdale to Cosenza | 4,935.27 mi (7,942.54 km) |
| Knightdale to Cossato | 4,367.66 mi (7,029.07 km) |
| Knightdale to Costa Volpino | 4,444.10 mi (7,152.09 km) |
| Knightdale to Creazzo | 4,513.09 mi (7,263.12 km) |
| Knightdale to Crema | 4,439.98 mi (7,145.46 km) |
| Knightdale to Cremona | 4,462.35 mi (7,181.46 km) |
| Knightdale to Crevalcore | 4,524.09 mi (7,280.81 km) |
| Knightdale to Crispiano | 4,932.66 mi (7,938.35 km) |
| Knightdale to Crosia | 4,949.11 mi (7,964.82 km) |
| Knightdale to Crotone | 4,982.62 mi (8,018.74 km) |
| Knightdale to Cuneo | 4,374.88 mi (7,040.69 km) |
| Knightdale to Cuorgne | 4,350.05 mi (7,000.73 km) |
| Knightdale to Cusano Milanino | 4,412.66 mi (7,101.49 km) |
| Knightdale to Cutro | 4,978.35 mi (8,011.88 km) |
