| Mercer Island to Collegno | 5,350.14 mi (8,610.22 km) |
| Mercer Island to Cologno al Serio | 5,374.33 mi (8,649.15 km) |
| Mercer Island to Cologno Monzese | 5,367.06 mi (8,637.44 km) |
| Mercer Island to Colorno | 5,429.91 mi (8,738.60 km) |
| Mercer Island to Comacchio | 5,487.86 mi (8,831.86 km) |
| Mercer Island to Comiso | 6,018.89 mi (9,686.47 km) |
| Mercer Island to Como | 5,345.60 mi (8,602.91 km) |
| Mercer Island to Concordia Sagittaria | 5,439.36 mi (8,753.81 km) |
| Mercer Island to Concorezzo | 5,364.88 mi (8,633.94 km) |
| Mercer Island to Conegliano | 5,419.13 mi (8,721.24 km) |
| Mercer Island to Conselice | 5,490.42 mi (8,835.98 km) |
| Mercer Island to Conselve | 5,448.17 mi (8,767.98 km) |
| Mercer Island to Conversano | 5,832.44 mi (9,386.40 km) |
| Mercer Island to Copertino | 5,897.33 mi (9,490.84 km) |
| Mercer Island to Copparo | 5,467.39 mi (8,798.91 km) |
