| Ontario to Cadiz | 5,856.55 mi (9,425.20 km) |
| Ontario to Calafell | 5,961.82 mi (9,594.62 km) |
| Ontario to Calahorra | 5,776.00 mi (9,295.58 km) |
| Ontario to Calasparra | 5,972.78 mi (9,612.27 km) |
| Ontario to Calatayud | 5,832.28 mi (9,386.15 km) |
| Ontario to Caldas de Montbuy | 5,963.58 mi (9,597.46 km) |
| Ontario to Caldas de Reyes | 5,499.29 mi (8,850.25 km) |
| Ontario to Calella | 5,982.78 mi (9,628.36 km) |
| Ontario to Callosa de Segura | 6,010.92 mi (9,673.64 km) |
| Ontario to Calpe | 6,023.49 mi (9,693.87 km) |
| Ontario to Calvia | 6,075.60 mi (9,777.74 km) |
| Ontario to Camas | 5,829.98 mi (9,382.44 km) |
| Ontario to Cambados | 5,497.02 mi (8,846.59 km) |
| Ontario to Cambre | 5,483.16 mi (8,824.29 km) |
| Ontario to Cambrils | 5,948.74 mi (9,573.58 km) |
