| Ontario to Cehegin | 5,975.11 mi (9,616.01 km) |
| Ontario to Cervello | 5,967.11 mi (9,603.14 km) |
| Ontario to Cervera | 5,928.49 mi (9,540.99 km) |
| Ontario to Ceuti | 5,997.09 mi (9,651.39 km) |
| Ontario to Cheste | 5,955.72 mi (9,584.81 km) |
| Ontario to Chiclana de la Frontera | 5,868.06 mi (9,443.73 km) |
| Ontario to Chipiona | 5,842.06 mi (9,401.88 km) |
| Ontario to Chiva | 5,954.71 mi (9,583.18 km) |
| Ontario to Churriana de la Vega | 5,941.62 mi (9,562.12 km) |
| Ontario to Ciempozuelos | 5,807.81 mi (9,346.77 km) |
| Ontario to Cieza | 5,983.77 mi (9,629.94 km) |
| Ontario to Cisterniga | 5,700.43 mi (9,173.96 km) |
| Ontario to Ciudad de Melilla | 6,055.64 mi (9,745.61 km) |
| Ontario to Ciudad Real | 5,848.35 mi (9,412.01 km) |
| Ontario to Ciudad-Rodrigo | 5,670.02 mi (9,125.01 km) |
