| Signal Hill to Cibolo (Texas) | 1,207.22 mi (1,942.83 km) |
| Signal Hill to Cicero (Illinois) | 1,739.44 mi (2,799.36 km) |
| Signal Hill to Cimarron Hills (Colorado) | 825.97 mi (1,329.28 km) |
| Signal Hill to Cincinnati (Ohio) | 1,895.04 mi (3,049.77 km) |
| Signal Hill to Cinco Ranch (Texas) | 1,342.94 mi (2,161.26 km) |
| Signal Hill to Circleville (Ohio) | 1,979.34 mi (3,185.44 km) |
| Signal Hill to Citrus (California) | 26.89 mi (43.28 km) |
| Signal Hill to Citrus Heights (California) | 380.01 mi (611.57 km) |
| Signal Hill to Citrus Park (Florida) | 2,136.02 mi (3,437.59 km) |
| Signal Hill to Claiborne (Louisiana) | 1,500.53 mi (2,414.88 km) |
| Signal Hill to Claremont (California) | 34.22 mi (55.07 km) |
| Signal Hill to Claremont (New Hampshire) | 2,528.07 mi (4,068.54 km) |
| Signal Hill to Claremore (Oklahoma) | 1,284.63 mi (2,067.41 km) |
| Signal Hill to Clarksburg (Maryland) | 2,282.42 mi (3,673.20 km) |
| Signal Hill to Clarksburg (West Virginia) | 2,118.83 mi (3,409.93 km) |
