| National City to Clemson (South Carolina) | 1,966.87 mi (3,165.38 km) |
| National City to Clermont (Florida) | 2,113.51 mi (3,401.37 km) |
| National City to Cleveland (Mississippi) | 1,522.16 mi (2,449.69 km) |
| National City to Cleveland (Ohio) | 2,029.18 mi (3,265.66 km) |
| National City to Cleveland (Tennessee) | 1,847.79 mi (2,973.73 km) |
| National City to Cleveland Heights (Ohio) | 2,035.45 mi (3,275.74 km) |
| National City to Cliffside Park (New Jersey) | 2,426.87 mi (3,905.67 km) |
| National City to Clifton (Colorado) | 655.23 mi (1,054.48 km) |
| National City to Clifton (New Jersey) | 2,417.98 mi (3,891.36 km) |
| National City to Clinton (Iowa) | 1,598.78 mi (2,572.99 km) |
| National City to Clinton (Maryland) | 2,275.14 mi (3,661.49 km) |
| National City to Clinton (Mississippi) | 1,555.08 mi (2,502.67 km) |
| National City to Clinton (Utah) | 647.87 mi (1,042.65 km) |
| National City to Clive (Iowa) | 1,418.39 mi (2,282.68 km) |
| National City to Cloquet (Minnesota) | 1,617.83 mi (2,603.64 km) |
