| Johnston to Cloverleaf (Texas) | 826.37 mi (1,329.92 km) |
| Johnston to Cloverly (Maryland) | 896.39 mi (1,442.61 km) |
| Johnston to Clovis (California) | 1,422.96 mi (2,290.04 km) |
| Johnston to Clovis (New Mexico) | 717.81 mi (1,155.20 km) |
| Johnston to Clute (Texas) | 880.11 mi (1,416.40 km) |
| Johnston to Coachella (California) | 1,339.44 mi (2,155.61 km) |
| Johnston to Coalinga (California) | 1,473.98 mi (2,372.13 km) |
| Johnston to Coamo (Puerto Rico) | 2,293.25 mi (3,690.64 km) |
| Johnston to Coatesville (Pennsylvania) | 941.53 mi (1,515.25 km) |
| Johnston to Cockeysville (Maryland) | 908.29 mi (1,461.76 km) |
| Johnston to Cocoa (Florida) | 1,173.05 mi (1,887.85 km) |
| Johnston to Cocoa Beach (Florida) | 1,180.74 mi (1,900.21 km) |
| Johnston to Coconut Creek (Florida) | 1,313.74 mi (2,114.27 km) |
| Johnston to Coeur d'Alene (Idaho) | 1,201.32 mi (1,933.34 km) |
| Johnston to Cohoes (New York) | 1,024.29 mi (1,648.43 km) |
