| Gretna to Cadiz | 4,706.81 mi (7,574.88 km) |
| Gretna to Calafell | 4,970.61 mi (7,999.42 km) |
| Gretna to Calahorra | 4,773.16 mi (7,681.66 km) |
| Gretna to Calasparra | 4,894.76 mi (7,877.36 km) |
| Gretna to Calatayud | 4,813.87 mi (7,747.18 km) |
| Gretna to Caldas de Montbuy | 4,986.48 mi (8,024.97 km) |
| Gretna to Caldas de Reyes | 4,446.48 mi (7,155.92 km) |
| Gretna to Calella | 5,010.26 mi (8,063.23 km) |
| Gretna to Callosa de Segura | 4,938.56 mi (7,947.85 km) |
| Gretna to Calpe | 4,969.51 mi (7,997.66 km) |
| Gretna to Calvia | 5,062.71 mi (8,147.65 km) |
| Gretna to Camas | 4,698.23 mi (7,561.06 km) |
| Gretna to Cambados | 4,440.85 mi (7,146.87 km) |
| Gretna to Cambre | 4,446.65 mi (7,156.20 km) |
| Gretna to Cambrils | 4,950.03 mi (7,966.31 km) |
