| Johnston to Castle Pines (Colorado) | 604.42 mi (972.73 km) |
| Johnston to Castle Rock (Colorado) | 605.46 mi (974.39 km) |
| Johnston to Castro Valley (California) | 1,524.28 mi (2,453.09 km) |
| Johnston to Catalina Foothills (Arizona) | 1,144.30 mi (1,841.58 km) |
| Johnston to Cataño (Puerto Rico) | 2,282.99 mi (3,674.11 km) |
| Johnston to Cathedral City (California) | 1,350.18 mi (2,172.91 km) |
| Johnston to Catonsville (Maryland) | 906.50 mi (1,458.87 km) |
| Johnston to Cave Spring (Virginia) | 792.93 mi (1,276.09 km) |
| Johnston to Cayce (South Carolina) | 873.27 mi (1,405.39 km) |
| Johnston to Cayey (Puerto Rico) | 2,299.47 mi (3,700.64 km) |
| Johnston to Cedar City (Utah) | 1,064.03 mi (1,712.38 km) |
| Johnston to Cedar Falls (Iowa) | 86.68 mi (139.50 km) |
| Johnston to Cedar Hill (Texas) | 654.04 mi (1,052.58 km) |
| Johnston to Cedar Lake (Indiana) | 325.74 mi (524.23 km) |
| Johnston to Cedar Mill (Oregon) | 1,470.23 mi (2,366.10 km) |
