| Mercer Island to Carmona | 5,384.16 mi (8,664.97 km) |
| Mercer Island to Cartagena | 5,530.11 mi (8,899.85 km) |
| Mercer Island to Cartama | 5,459.27 mi (8,785.85 km) |
| Mercer Island to Cartaya | 5,342.31 mi (8,597.62 km) |
| Mercer Island to Caspe | 5,356.16 mi (8,619.91 km) |
| Mercer Island to Cassa de la Selva | 5,405.40 mi (8,699.16 km) |
| Mercer Island to Castalla | 5,484.17 mi (8,825.92 km) |
| Mercer Island to Castellbisbal | 5,402.79 mi (8,694.95 km) |
| Mercer Island to Castelldefels | 5,413.80 mi (8,712.66 km) |
| Mercer Island to Castello de Ampurias | 5,390.14 mi (8,674.59 km) |
| Mercer Island to Castellon de la Plana | 5,426.31 mi (8,732.80 km) |
| Mercer Island to Castilleja de la Cuesta | 5,374.56 mi (8,649.51 km) |
| Mercer Island to Catarroja | 5,447.35 mi (8,766.66 km) |
| Mercer Island to Catral | 5,504.42 mi (8,858.51 km) |
| Mercer Island to Caudete | 5,468.11 mi (8,800.07 km) |
