| Grays to Caguas (Puerto Rico) | 4,227.84 mi (6,804.06 km) |
| Grays to Cahokia (Illinois) | 4,221.15 mi (6,793.29 km) |
| Grays to Calabasas (California) | 5,465.24 mi (8,795.46 km) |
| Grays to Caldwell (Idaho) | 4,864.32 mi (7,828.36 km) |
| Grays to Caledonia (Wisconsin) | 3,932.63 mi (6,328.96 km) |
| Grays to Calera (Alabama) | 4,352.19 mi (7,004.18 km) |
| Grays to Calexico (California) | 5,445.04 mi (8,762.94 km) |
| Grays to Calhoun (Georgia) | 4,212.18 mi (6,778.85 km) |
| Grays to California (Maryland) | 3,689.41 mi (5,937.54 km) |
| Grays to California City (California) | 5,381.47 mi (8,660.64 km) |
| Grays to Callaway (Florida) | 4,452.62 mi (7,165.80 km) |
| Grays to Calumet City (Illinois) | 3,975.34 mi (6,397.69 km) |
| Grays to Calverton (Maryland) | 3,673.62 mi (5,912.12 km) |
| Grays to Camano (Washington) | 4,768.43 mi (7,674.05 km) |
| Grays to Camarillo (California) | 5,471.82 mi (8,806.04 km) |
