| Ontario to Camarillo (California) | 82.52 mi (132.80 km) |
| Ontario to Camas (Washington) | 838.40 mi (1,349.28 km) |
| Ontario to Cambridge (Maryland) | 2,313.78 mi (3,723.66 km) |
| Ontario to Cambridge (Massachusetts) | 2,555.69 mi (4,112.99 km) |
| Ontario to Camden (Arkansas) | 1,418.44 mi (2,282.75 km) |
| Ontario to Camden (New Jersey) | 2,358.01 mi (3,794.85 km) |
| Ontario to Cameron Park (California) | 371.31 mi (597.57 km) |
| Ontario to Camp Pendleton South (California) | 57.05 mi (91.82 km) |
| Ontario to Camp Springs (Maryland) | 2,267.07 mi (3,648.50 km) |
| Ontario to Camp Verde (Arizona) | 330.19 mi (531.39 km) |
| Ontario to Campbell (California) | 331.14 mi (532.93 km) |
| Ontario to Campbellsville (Kentucky) | 1,815.49 mi (2,921.75 km) |
| Ontario to Campton Hills (Illinois) | 1,671.09 mi (2,689.36 km) |
| Ontario to Canby (Oregon) | 820.92 mi (1,321.14 km) |
| Ontario to Candelaria (Puerto Rico) | 3,325.77 mi (5,352.31 km) |
