| Johnston to Conyers (Georgia) | 767.42 mi (1,235.04 km) |
| Johnston to Cookeville (Tennessee) | 583.94 mi (939.76 km) |
| Johnston to Coolidge (Arizona) | 1,146.70 mi (1,845.43 km) |
| Johnston to Coon Rapids (Minnesota) | 241.65 mi (388.90 km) |
| Johnston to Cooper City (Florida) | 1,324.06 mi (2,130.87 km) |
| Johnston to Coos Bay (Oregon) | 1,549.01 mi (2,492.89 km) |
| Johnston to Copiague (New York) | 1,057.15 mi (1,701.32 km) |
| Johnston to Coppell (Texas) | 628.99 mi (1,012.27 km) |
| Johnston to Copperas Cove (Texas) | 766.44 mi (1,233.47 km) |
| Johnston to Coral Gables (Florida) | 1,344.68 mi (2,164.06 km) |
| Johnston to Coral Springs (Florida) | 1,311.85 mi (2,111.21 km) |
| Johnston to Coral Terrace (Florida) | 1,341.08 mi (2,158.26 km) |
| Johnston to Coralville (Iowa) | 109.72 mi (176.58 km) |
| Johnston to Coram (New York) | 1,074.48 mi (1,729.21 km) |
| Johnston to Corcoran (California) | 1,436.47 mi (2,311.77 km) |
