| Ontario to Hillcrest Heights (Maryland) | 2,264.52 mi (3,644.40 km) |
| Ontario to Hilliard (Ohio) | 1,931.92 mi (3,109.12 km) |
| Ontario to Hillsboro (Oregon) | 842.17 mi (1,355.35 km) |
| Ontario to Hillsborough (California) | 360.46 mi (580.11 km) |
| Ontario to Hillsborough (New Jersey) | 2,379.57 mi (3,829.55 km) |
| Ontario to Hilo (Hawaii) | 2,495.99 mi (4,016.90 km) |
| Ontario to Hilton Head Island (South Carolina) | 2,125.28 mi (3,420.31 km) |
| Ontario to Hinesville (Georgia) | 2,082.17 mi (3,350.93 km) |
| Ontario to Hinsdale (Illinois) | 1,694.33 mi (2,726.76 km) |
| Ontario to Hobart (Indiana) | 1,724.99 mi (2,776.11 km) |
| Ontario to Hobbs (New Mexico) | 837.66 mi (1,348.08 km) |
| Ontario to Hobe Sound (Florida) | 2,267.30 mi (3,648.86 km) |
| Ontario to Hoboken (New Jersey) | 2,411.32 mi (3,880.65 km) |
| Ontario to Hockessin (Delaware) | 2,328.31 mi (3,747.05 km) |
| Ontario to Hoffman Estates (Illinois) | 1,686.05 mi (2,713.44 km) |
