| National City to Cloverleaf (Texas) | 1,308.21 mi (2,105.36 km) |
| National City to Cloverly (Maryland) | 2,269.43 mi (3,652.29 km) |
| National City to Clovis (California) | 322.83 mi (519.54 km) |
| National City to Clovis (New Mexico) | 809.37 mi (1,302.55 km) |
| National City to Clute (Texas) | 1,309.19 mi (2,106.93 km) |
| National City to Coachella (California) | 89.82 mi (144.56 km) |
| National City to Coalinga (California) | 302.48 mi (486.79 km) |
| National City to Coamo (Puerto Rico) | 3,290.54 mi (5,295.62 km) |
| National City to Coatesville (Pennsylvania) | 2,331.18 mi (3,751.67 km) |
| National City to Cockeysville (Maryland) | 2,288.69 mi (3,683.29 km) |
| National City to Cocoa (Florida) | 2,171.95 mi (3,495.41 km) |
| National City to Cocoa Beach (Florida) | 2,181.09 mi (3,510.12 km) |
| National City to Coconut Creek (Florida) | 2,252.22 mi (3,624.60 km) |
| National City to Coeur d'Alene (Idaho) | 1,039.19 mi (1,672.41 km) |
| National City to Cohoes (New York) | 2,442.77 mi (3,931.26 km) |
