| Fountain Valley to Cortona | 6,251.47 mi (10,060.77 km) |
| Fountain Valley to Cosenza | 6,604.06 mi (10,628.21 km) |
| Fountain Valley to Cossato | 6,008.37 mi (9,669.53 km) |
| Fountain Valley to Costa Volpino | 6,056.69 mi (9,747.30 km) |
| Fountain Valley to Creazzo | 6,115.69 mi (9,842.25 km) |
| Fountain Valley to Crema | 6,067.62 mi (9,764.90 km) |
| Fountain Valley to Cremona | 6,090.97 mi (9,802.47 km) |
| Fountain Valley to Crevalcore | 6,148.37 mi (9,894.85 km) |
| Fountain Valley to Crispiano | 6,562.73 mi (10,561.69 km) |
| Fountain Valley to Crosia | 6,605.72 mi (10,630.88 km) |
| Fountain Valley to Crotone | 6,643.71 mi (10,692.02 km) |
| Fountain Valley to Cuneo | 6,048.31 mi (9,733.81 km) |
| Fountain Valley to Cuorgne | 6,000.48 mi (9,656.84 km) |
| Fountain Valley to Cusano Milanino | 6,042.10 mi (9,723.81 km) |
| Fountain Valley to Cutro | 6,642.27 mi (10,689.69 km) |
