| Echelon to Cadillac (Michigan) | 614.40 mi (988.78 km) |
| Echelon to Caguas (Puerto Rico) | 1,586.36 mi (2,553.00 km) |
| Echelon to Cahokia (Illinois) | 816.73 mi (1,314.40 km) |
| Echelon to Calabasas (California) | 2,417.94 mi (3,891.29 km) |
| Echelon to Caldwell (Idaho) | 2,141.02 mi (3,445.63 km) |
| Echelon to Caledonia (Wisconsin) | 697.93 mi (1,123.20 km) |
| Echelon to Calera (Alabama) | 799.95 mi (1,287.40 km) |
| Echelon to Calexico (California) | 2,289.41 mi (3,684.45 km) |
| Echelon to Calhoun (Georgia) | 660.16 mi (1,062.43 km) |
| Echelon to California (Maryland) | 133.99 mi (215.64 km) |
| Echelon to California City (California) | 2,349.80 mi (3,781.64 km) |
| Echelon to Callaway (Florida) | 897.40 mi (1,444.22 km) |
| Echelon to Calumet City (Illinois) | 667.93 mi (1,074.92 km) |
| Echelon to Calverton (Maryland) | 117.64 mi (189.32 km) |
| Echelon to Camano (Washington) | 2,387.81 mi (3,842.81 km) |
