| Signal Hill to Cadillac (Michigan) | 1,884.68 mi (3,033.10 km) |
| Signal Hill to Caguas (Puerto Rico) | 3,372.44 mi (5,427.42 km) |
| Signal Hill to Cahokia (Illinois) | 1,588.63 mi (2,556.65 km) |
| Signal Hill to Calabasas (California) | 36.85 mi (59.30 km) |
| Signal Hill to Caldwell (Idaho) | 684.85 mi (1,102.16 km) |
| Signal Hill to Caledonia (Wisconsin) | 1,744.61 mi (2,807.68 km) |
| Signal Hill to Calera (Alabama) | 1,804.77 mi (2,904.49 km) |
| Signal Hill to Calexico (California) | 172.73 mi (277.98 km) |
| Signal Hill to Calhoun (Georgia) | 1,892.11 mi (3,045.06 km) |
| Signal Hill to California (Maryland) | 2,328.83 mi (3,747.88 km) |
| Signal Hill to California City (California) | 95.11 mi (153.07 km) |
| Signal Hill to Callaway (Florida) | 1,920.18 mi (3,090.23 km) |
| Signal Hill to Calumet City (Illinois) | 1,747.80 mi (2,812.81 km) |
| Signal Hill to Calverton (Maryland) | 2,300.13 mi (3,701.71 km) |
| Signal Hill to Camano (Washington) | 1,018.39 mi (1,638.94 km) |
