| Mercer Island to Cadiz | 5,412.10 mi (8,709.93 km) |
| Mercer Island to Calafell | 5,406.22 mi (8,700.47 km) |
| Mercer Island to Calahorra | 5,237.74 mi (8,429.32 km) |
| Mercer Island to Calasparra | 5,471.85 mi (8,806.09 km) |
| Mercer Island to Calatayud | 5,300.58 mi (8,530.46 km) |
| Mercer Island to Caldas de Montbuy | 5,399.38 mi (8,689.46 km) |
| Mercer Island to Caldas de Reyes | 5,008.81 mi (8,060.90 km) |
| Mercer Island to Calella | 5,414.83 mi (8,714.33 km) |
| Mercer Island to Callosa de Segura | 5,504.11 mi (8,858.01 km) |
| Mercer Island to Calpe | 5,503.94 mi (8,857.74 km) |
| Mercer Island to Calvia | 5,527.18 mi (8,895.13 km) |
| Mercer Island to Camas | 5,374.11 mi (8,648.80 km) |
| Mercer Island to Cambados | 5,008.88 mi (8,061.01 km) |
| Mercer Island to Cambre | 4,983.04 mi (8,019.42 km) |
| Mercer Island to Cambrils | 5,398.43 mi (8,687.93 km) |
