| National City to Cordele (Georgia) | 1,938.81 mi (3,120.21 km) |
| National City to Corinth (Mississippi) | 1,643.01 mi (2,644.17 km) |
| National City to Corinth (Texas) | 1,160.63 mi (1,867.86 km) |
| National City to Cornelius (North Carolina) | 2,070.35 mi (3,331.91 km) |
| National City to Cornelius (Oregon) | 943.02 mi (1,517.64 km) |
| National City to Corning (New York) | 2,270.27 mi (3,653.65 km) |
| National City to Corona (California) | 86.93 mi (139.91 km) |
| National City to Coronado (California) | 3.61 mi (5.81 km) |
| National City to Corpus Christi (Texas) | 1,224.07 mi (1,969.95 km) |
| National City to Corsicana (Texas) | 1,202.74 mi (1,935.62 km) |
| National City to Cortland (New York) | 2,316.87 mi (3,728.64 km) |
| National City to Corvallis (Oregon) | 886.91 mi (1,427.34 km) |
| National City to Coshocton (Ohio) | 2,013.39 mi (3,240.23 km) |
| National City to Costa Mesa (California) | 83.72 mi (134.74 km) |
| National City to Coto de Caza (California) | 70.21 mi (112.99 km) |
