| Johnston to Cadillac (Michigan) | 455.38 mi (732.86 km) |
| Johnston to Caguas (Puerto Rico) | 2,298.35 mi (3,698.84 km) |
| Johnston to Cahokia (Illinois) | 285.79 mi (459.93 km) |
| Johnston to Calabasas (California) | 1,450.06 mi (2,333.64 km) |
| Johnston to Caldwell (Idaho) | 1,169.25 mi (1,881.73 km) |
| Johnston to Caledonia (Wisconsin) | 308.64 mi (496.70 km) |
| Johnston to Calera (Alabama) | 704.36 mi (1,133.56 km) |
| Johnston to Calexico (California) | 1,344.93 mi (2,164.45 km) |
| Johnston to Calhoun (Georgia) | 688.95 mi (1,108.76 km) |
| Johnston to California (Maryland) | 939.85 mi (1,512.54 km) |
| Johnston to California City (California) | 1,377.40 mi (2,216.71 km) |
| Johnston to Callaway (Florida) | 918.92 mi (1,478.86 km) |
| Johnston to Calumet City (Illinois) | 318.66 mi (512.83 km) |
| Johnston to Calverton (Maryland) | 899.97 mi (1,448.37 km) |
| Johnston to Camano (Washington) | 1,465.93 mi (2,359.18 km) |
