| Ontario to Hazelwood (Missouri) | 1,542.41 mi (2,482.28 km) |
| Ontario to Hazleton (Pennsylvania) | 2,309.18 mi (3,716.27 km) |
| Ontario to Healdsburg (California) | 431.06 mi (693.72 km) |
| Ontario to Heath (Ohio) | 1,969.80 mi (3,170.09 km) |
| Ontario to Heber (Utah) | 561.97 mi (904.41 km) |
| Ontario to Helena (Alabama) | 1,761.19 mi (2,834.35 km) |
| Ontario to Helena (Montana) | 915.55 mi (1,473.44 km) |
| Ontario to Hemet (California) | 40.83 mi (65.70 km) |
| Ontario to Henderson (Kentucky) | 1,692.66 mi (2,724.08 km) |
| Ontario to Henderson (Nevada) | 199.28 mi (320.71 km) |
| Ontario to Henderson (North Carolina) | 2,203.73 mi (3,546.57 km) |
| Ontario to Henderson (Texas) | 1,323.94 mi (2,130.68 km) |
| Ontario to Hendersonville (North Carolina) | 1,988.55 mi (3,200.26 km) |
| Ontario to Hendersonville (Tennessee) | 1,750.71 mi (2,817.50 km) |
| Ontario to Hercules (California) | 377.58 mi (607.66 km) |
