| Johnston to Cibolo (Texas) | 874.67 mi (1,407.65 km) |
| Johnston to Cicero (Illinois) | 307.47 mi (494.83 km) |
| Johnston to Cimarron Hills (Colorado) | 610.25 mi (982.10 km) |
| Johnston to Cincinnati (Ohio) | 515.56 mi (829.72 km) |
| Johnston to Cinco Ranch (Texas) | 833.57 mi (1,341.50 km) |
| Johnston to Circleville (Ohio) | 583.25 mi (938.65 km) |
| Johnston to Citrus (California) | 1,411.63 mi (2,271.80 km) |
| Johnston to Citrus Heights (California) | 1,463.10 mi (2,354.64 km) |
| Johnston to Citrus Park (Florida) | 1,131.55 mi (1,821.06 km) |
| Johnston to Claiborne (Louisiana) | 637.95 mi (1,026.67 km) |
| Johnston to Claremont (California) | 1,402.60 mi (2,257.26 km) |
| Johnston to Claremont (New Hampshire) | 1,092.04 mi (1,757.47 km) |
| Johnston to Claremore (Oklahoma) | 385.00 mi (619.60 km) |
| Johnston to Clarksburg (Maryland) | 880.38 mi (1,416.84 km) |
| Johnston to Clarksburg (West Virginia) | 722.67 mi (1,163.02 km) |
