| National City to Cibolo (Texas) | 1,135.97 mi (1,828.17 km) |
| National City to Cicero (Illinois) | 1,723.13 mi (2,773.11 km) |
| National City to Cimarron Hills (Colorado) | 815.20 mi (1,311.93 km) |
| National City to Cincinnati (Ohio) | 1,867.32 mi (3,005.15 km) |
| National City to Cinco Ranch (Texas) | 1,274.88 mi (2,051.73 km) |
| National City to Circleville (Ohio) | 1,953.14 mi (3,143.27 km) |
| National City to Citrus (California) | 110.12 mi (177.22 km) |
| National City to Citrus Heights (California) | 478.23 mi (769.63 km) |
| National City to Citrus Park (Florida) | 2,073.86 mi (3,337.56 km) |
| National City to Claiborne (Louisiana) | 1,446.03 mi (2,327.16 km) |
| National City to Claremont (California) | 107.00 mi (172.20 km) |
| National City to Claremont (New Hampshire) | 2,513.26 mi (4,044.71 km) |
| National City to Claremore (Oklahoma) | 1,246.69 mi (2,006.36 km) |
| National City to Clarksburg (Maryland) | 2,255.00 mi (3,629.06 km) |
| National City to Clarksburg (West Virginia) | 2,091.44 mi (3,365.84 km) |
