| National City to Candler-McAfee (Georgia) | 1,891.32 mi (3,043.79 km) |
| National City to Caño Martin Peña (Puerto Rico) | 3,297.23 mi (5,306.38 km) |
| National City to Cañon City (Colorado) | 776.96 mi (1,250.39 km) |
| National City to Canóvanas (Puerto Rico) | 3,307.90 mi (5,323.55 km) |
| National City to Canton (Georgia) | 1,874.90 mi (3,017.36 km) |
| National City to Canton (Illinois) | 1,589.01 mi (2,557.26 km) |
| National City to Canton (Mississippi) | 1,570.62 mi (2,527.67 km) |
| National City to Canton (Ohio) | 2,041.26 mi (3,285.09 km) |
| National City to Canyon (Texas) | 885.02 mi (1,424.29 km) |
| National City to Canyon Lake (California) | 71.32 mi (114.78 km) |
| National City to Canyon Lake (Texas) | 1,127.45 mi (1,814.45 km) |
| National City to Cape Coral (Florida) | 2,138.32 mi (3,441.29 km) |
| National City to Cape Girardeau (Missouri) | 1,585.61 mi (2,551.80 km) |
| National City to Carbondale (Illinois) | 1,605.85 mi (2,584.37 km) |
| National City to Carlisle (Pennsylvania) | 2,258.02 mi (3,633.94 km) |
