| Ontario to Chicago Ridge (Illinois) | 1,700.87 mi (2,737.28 km) |
| Ontario to Chickasha (Oklahoma) | 1,119.21 mi (1,801.19 km) |
| Ontario to Chico (California) | 458.35 mi (737.65 km) |
| Ontario to Chicopee (Massachusetts) | 2,482.05 mi (3,994.47 km) |
| Ontario to Chillicothe (Ohio) | 1,940.10 mi (3,122.29 km) |
| Ontario to Chillum (Maryland) | 2,263.05 mi (3,642.02 km) |
| Ontario to Chino (California) | 5.12 mi (8.24 km) |
| Ontario to Chino Hills (California) | 9.16 mi (14.74 km) |
| Ontario to Chino Valley (Arizona) | 300.25 mi (483.20 km) |
| Ontario to Chippewa Falls (Wisconsin) | 1,577.72 mi (2,539.10 km) |
| Ontario to Choctaw (Oklahoma) | 1,156.79 mi (1,861.68 km) |
| Ontario to Chowchilla (California) | 258.47 mi (415.96 km) |
| Ontario to Christiansburg (Virginia) | 2,087.91 mi (3,360.17 km) |
| Ontario to Chubbuck (Idaho) | 673.78 mi (1,084.34 km) |
| Ontario to Chula Vista (California) | 103.32 mi (166.28 km) |
