| Echelon to Cadiz | 3,643.40 mi (5,863.48 km) |
| Echelon to Calafell | 3,883.13 mi (6,249.30 km) |
| Echelon to Calahorra | 3,685.84 mi (5,931.78 km) |
| Echelon to Calasparra | 3,818.05 mi (6,144.55 km) |
| Echelon to Calatayud | 3,728.35 mi (6,000.20 km) |
| Echelon to Caldas de Montbuy | 3,897.87 mi (6,273.02 km) |
| Echelon to Caldas de Reyes | 3,362.95 mi (5,412.14 km) |
| Echelon to Calella | 3,921.39 mi (6,310.86 km) |
| Echelon to Callosa de Segura | 3,861.21 mi (6,214.01 km) |
| Echelon to Calpe | 3,889.50 mi (6,259.54 km) |
| Echelon to Calvia | 3,977.91 mi (6,401.83 km) |
| Echelon to Camas | 3,630.52 mi (5,842.76 km) |
| Echelon to Cambados | 3,357.73 mi (5,403.75 km) |
| Echelon to Cambre | 3,361.12 mi (5,409.20 km) |
| Echelon to Cambrils | 3,863.17 mi (6,217.17 km) |
