| Ontario to Hereford (Texas) | 867.44 mi (1,396.02 km) |
| Ontario to Hermiston (Oregon) | 819.63 mi (1,319.06 km) |
| Ontario to Hermitage (Pennsylvania) | 2,076.48 mi (3,341.77 km) |
| Ontario to Hermosa Beach (California) | 46.84 mi (75.37 km) |
| Ontario to Hernando (Mississippi) | 1,569.47 mi (2,525.82 km) |
| Ontario to Herndon (Virginia) | 2,241.19 mi (3,606.85 km) |
| Ontario to Herriman (Utah) | 541.11 mi (870.84 km) |
| Ontario to Herrin (Illinois) | 1,613.48 mi (2,596.64 km) |
| Ontario to Hershey (Pennsylvania) | 2,275.55 mi (3,662.15 km) |
| Ontario to Hesperia (California) | 29.84 mi (48.02 km) |
| Ontario to Hewitt (Texas) | 1,197.45 mi (1,927.11 km) |
| Ontario to Hialeah (Florida) | 2,289.74 mi (3,684.98 km) |
| Ontario to Hialeah Gardens (Florida) | 2,286.25 mi (3,679.37 km) |
| Ontario to Hibbing (Minnesota) | 1,576.01 mi (2,536.35 km) |
| Ontario to Hickory (North Carolina) | 2,048.01 mi (3,295.96 km) |
