| Ontario to Hickory Hills (Illinois) | 1,698.61 mi (2,733.65 km) |
| Ontario to Hicksville (New York) | 2,437.56 mi (3,922.88 km) |
| Ontario to Hidalgo (Texas) | 1,277.76 mi (2,056.35 km) |
| Ontario to High Point (North Carolina) | 2,119.51 mi (3,411.02 km) |
| Ontario to Highland (California) | 25.75 mi (41.44 km) |
| Ontario to Highland (Illinois) | 1,580.38 mi (2,543.37 km) |
| Ontario to Highland (Indiana) | 1,715.77 mi (2,761.27 km) |
| Ontario to Highland (Utah) | 544.68 mi (876.58 km) |
| Ontario to Highland City (Florida) | 2,145.99 mi (3,453.63 km) |
| Ontario to Highland Park (Illinois) | 1,704.39 mi (2,742.96 km) |
| Ontario to Highland Park (New Jersey) | 2,391.34 mi (3,848.49 km) |
| Ontario to Highland Springs (Virginia) | 2,253.06 mi (3,625.95 km) |
| Ontario to Highland Village (Texas) | 1,182.67 mi (1,903.32 km) |
| Ontario to Highlands Ranch (Colorado) | 794.76 mi (1,279.04 km) |
| Ontario to Hillcrest (California) | 120.25 mi (193.52 km) |
