| Silves to Caguas (Puerto Rico) | 3,697.85 mi (5,951.11 km) |
| Silves to Cahokia (Illinois) | 4,298.07 mi (6,917.08 km) |
| Silves to Calabasas (California) | 5,777.37 mi (9,297.78 km) |
| Silves to Caldwell (Idaho) | 5,271.53 mi (8,483.70 km) |
| Silves to Caledonia (Wisconsin) | 4,063.69 mi (6,539.88 km) |
| Silves to Calera (Alabama) | 4,301.45 mi (6,922.51 km) |
| Silves to Calexico (California) | 5,703.36 mi (9,178.67 km) |
| Silves to Calhoun (Georgia) | 4,165.88 mi (6,704.33 km) |
| Silves to California (Maryland) | 3,630.05 mi (5,842.01 km) |
| Silves to California City (California) | 5,696.95 mi (9,168.36 km) |
| Silves to Callaway (Florida) | 4,339.28 mi (6,983.40 km) |
| Silves to Calumet City (Illinois) | 4,081.73 mi (6,568.92 km) |
| Silves to Calverton (Maryland) | 3,633.83 mi (5,848.09 km) |
| Silves to Camano (Washington) | 5,282.66 mi (8,501.62 km) |
| Silves to Camarillo (California) | 5,789.07 mi (9,316.60 km) |
