| Signal Hill to Castle Pines (Colorado) | 833.34 mi (1,341.13 km) |
| Signal Hill to Castle Rock (Colorado) | 831.79 mi (1,338.63 km) |
| Signal Hill to Castro Valley (California) | 347.07 mi (558.55 km) |
| Signal Hill to Catalina Foothills (Arizona) | 434.25 mi (698.86 km) |
| Signal Hill to Cataño (Puerto Rico) | 3,359.48 mi (5,406.56 km) |
| Signal Hill to Cathedral City (California) | 97.83 mi (157.45 km) |
| Signal Hill to Catonsville (Maryland) | 2,310.20 mi (3,717.90 km) |
| Signal Hill to Cave Spring (Virginia) | 2,144.67 mi (3,451.51 km) |
| Signal Hill to Cayce (South Carolina) | 2,117.83 mi (3,408.32 km) |
| Signal Hill to Cayey (Puerto Rico) | 3,369.31 mi (5,422.37 km) |
| Signal Hill to Cedar City (Utah) | 390.77 mi (628.89 km) |
| Signal Hill to Cedar Falls (Iowa) | 1,513.56 mi (2,435.83 km) |
| Signal Hill to Cedar Hill (Texas) | 1,227.04 mi (1,974.74 km) |
| Signal Hill to Cedar Lake (Indiana) | 1,751.29 mi (2,818.42 km) |
| Signal Hill to Cedar Mill (Oregon) | 846.86 mi (1,362.89 km) |
