| Portales to Cortona | 5,713.36 mi (9,194.76 km) |
| Portales to Cosenza | 6,062.00 mi (9,755.85 km) |
| Portales to Cossato | 5,467.20 mi (8,798.61 km) |
| Portales to Costa Volpino | 5,528.21 mi (8,896.79 km) |
| Portales to Creazzo | 5,592.57 mi (9,000.37 km) |
| Portales to Crema | 5,533.08 mi (8,904.62 km) |
| Portales to Cremona | 5,556.47 mi (8,942.27 km) |
| Portales to Crevalcore | 5,616.82 mi (9,039.39 km) |
| Portales to Crispiano | 6,036.65 mi (9,715.05 km) |
| Portales to Crosia | 6,068.97 mi (9,767.07 km) |
| Portales to Crotone | 6,105.70 mi (9,826.18 km) |
| Portales to Cuneo | 5,494.21 mi (8,842.08 km) |
| Portales to Cuorgne | 5,455.11 mi (8,779.15 km) |
| Portales to Cusano Milanino | 5,506.29 mi (8,861.52 km) |
| Portales to Cutro | 6,103.01 mi (9,821.84 km) |
