| Echelon to Carrollwood (Florida) | 920.72 mi (1,481.75 km) |
| Echelon to Carson (California) | 2,404.06 mi (3,868.96 km) |
| Echelon to Carson City (Nevada) | 2,360.99 mi (3,799.65 km) |
| Echelon to Carteret (New Jersey) | 65.04 mi (104.67 km) |
| Echelon to Cartersville (Georgia) | 667.84 mi (1,074.78 km) |
| Echelon to Carthage (Missouri) | 1,059.38 mi (1,704.91 km) |
| Echelon to Cary (Illinois) | 709.05 mi (1,141.11 km) |
| Echelon to Cary (North Carolina) | 349.91 mi (563.13 km) |
| Echelon to Casa de Oro-Mount Helix (California) | 2,365.37 mi (3,806.70 km) |
| Echelon to Casa Grande (Arizona) | 2,085.21 mi (3,355.82 km) |
| Echelon to Casas Adobes (Arizona) | 2,061.51 mi (3,317.68 km) |
| Echelon to Cascades (Virginia) | 139.11 mi (223.87 km) |
| Echelon to Casper (Wyoming) | 1,628.48 mi (2,620.79 km) |
| Echelon to Casselberry (Florida) | 852.52 mi (1,372.00 km) |
| Echelon to Castaic (California) | 2,406.98 mi (3,873.66 km) |
