| National City to Clarksdale (Mississippi) | 1,529.08 mi (2,460.81 km) |
| National City to Clarkston (Georgia) | 1,892.44 mi (3,045.58 km) |
| National City to Clarksville (Indiana) | 1,796.18 mi (2,890.67 km) |
| National City to Clarksville (Tennessee) | 1,706.43 mi (2,746.23 km) |
| National City to Clawson (Michigan) | 1,963.80 mi (3,160.43 km) |
| National City to Clay (Alabama) | 1,758.17 mi (2,829.50 km) |
| National City to Clayton (California) | 454.89 mi (732.07 km) |
| National City to Clayton (Missouri) | 1,552.31 mi (2,498.21 km) |
| National City to Clayton (North Carolina) | 2,205.10 mi (3,548.76 km) |
| National City to Clayton (Ohio) | 1,880.50 mi (3,026.37 km) |
| National City to Clearfield (Utah) | 646.62 mi (1,040.63 km) |
| National City to Clearlake (California) | 533.84 mi (859.13 km) |
| National City to Clearwater (Florida) | 2,064.22 mi (3,322.03 km) |
| National City to Cleburne (Texas) | 1,145.40 mi (1,843.35 km) |
| National City to Clemmons (North Carolina) | 2,094.75 mi (3,371.18 km) |
