| Ontario to Hutchinson (Kansas) | 1,132.59 mi (1,822.73 km) |
| Ontario to Hutchinson (Minnesota) | 1,440.33 mi (2,317.99 km) |
| Ontario to Hutto (Texas) | 1,194.43 mi (1,922.24 km) |
| Ontario to Hyattsville (Maryland) | 2,264.38 mi (3,644.16 km) |
| Ontario to Hybla Valley (Virginia) | 2,258.67 mi (3,634.97 km) |
| Ontario to Idaho Falls (Idaho) | 718.02 mi (1,155.54 km) |
| Ontario to Idylwood (Virginia) | 2,251.30 mi (3,623.11 km) |
| Ontario to Ilchester (Maryland) | 2,273.09 mi (3,658.18 km) |
| Ontario to Immokalee (Florida) | 2,210.77 mi (3,557.89 km) |
| Ontario to Imperial (California) | 143.65 mi (231.18 km) |
| Ontario to Imperial Beach (California) | 105.41 mi (169.64 km) |
| Ontario to Independence (Kentucky) | 1,856.74 mi (2,988.13 km) |
| Ontario to Independence (Missouri) | 1,332.78 mi (2,144.91 km) |
| Ontario to Indian Trail (North Carolina) | 2,092.34 mi (3,367.30 km) |
| Ontario to Indiana (Pennsylvania) | 2,143.11 mi (3,449.00 km) |
