| Mercer Island to Cassina de' Pecchi | 5,369.97 mi (8,642.13 km) |
| Mercer Island to Cassino | 5,721.73 mi (9,208.23 km) |
| Mercer Island to Castagneto Carducci | 5,540.74 mi (8,916.96 km) |
| Mercer Island to Castano Primo | 5,352.93 mi (8,614.71 km) |
| Mercer Island to Castel Bolognese | 5,501.63 mi (8,854.02 km) |
| Mercer Island to Castel Gandolfo | 5,677.61 mi (9,137.24 km) |
| Mercer Island to Castel Goffredo | 5,410.44 mi (8,707.26 km) |
| Mercer Island to Castel Maggiore | 5,476.04 mi (8,812.84 km) |
| Mercer Island to Castel Mella | 5,390.42 mi (8,675.04 km) |
| Mercer Island to Castel San Giorgio | 5,786.59 mi (9,312.61 km) |
| Mercer Island to Castel San Giovanni | 5,399.27 mi (8,689.28 km) |
| Mercer Island to Castel San Pietro Terme | 5,491.34 mi (8,837.46 km) |
| Mercer Island to Castel Volturno | 5,751.19 mi (9,255.64 km) |
| Mercer Island to Castelbuono | 5,945.99 mi (9,569.14 km) |
| Mercer Island to Casteldaccia | 5,924.38 mi (9,534.37 km) |
