| Ontario to Home Gardens (California) | 12.38 mi (19.92 km) |
| Ontario to Homer Glen (Illinois) | 1,691.19 mi (2,721.70 km) |
| Ontario to Homestead (Florida) | 2,292.73 mi (3,689.80 km) |
| Ontario to Homewood (Alabama) | 1,763.00 mi (2,837.27 km) |
| Ontario to Homewood (Illinois) | 1,705.52 mi (2,744.77 km) |
| Ontario to Homosassa Springs (Florida) | 2,088.44 mi (3,361.02 km) |
| Ontario to Honeygo (Maryland) | 2,290.35 mi (3,685.97 km) |
| Ontario to Honolulu (Hawaii) | 2,594.42 mi (4,175.31 km) |
| Ontario to Hoover (Alabama) | 1,764.16 mi (2,839.14 km) |
| Ontario to Hopatcong (New Jersey) | 2,377.65 mi (3,826.46 km) |
| Ontario to Hope Mills (North Carolina) | 2,187.57 mi (3,520.56 km) |
| Ontario to Hopewell (Virginia) | 2,256.71 mi (3,631.83 km) |
| Ontario to Hopkins (Minnesota) | 1,485.26 mi (2,390.30 km) |
| Ontario to Hopkinsville (Kentucky) | 1,699.96 mi (2,735.83 km) |
| Ontario to Horizon City (Texas) | 681.92 mi (1,097.44 km) |
