| Ontario to Indianapolis (Indiana) | 1,773.00 mi (2,853.37 km) |
| Ontario to Indianola (Iowa) | 1,402.57 mi (2,257.22 km) |
| Ontario to Indio (California) | 81.45 mi (131.08 km) |
| Ontario to Inglewood (California) | 42.66 mi (68.65 km) |
| Ontario to Inkster (Michigan) | 1,933.36 mi (3,111.44 km) |
| Ontario to Inver Grove Heights (Minnesota) | 1,498.42 mi (2,411.48 km) |
| Ontario to Inwood (New York) | 2,426.34 mi (3,904.82 km) |
| Ontario to Iona (Florida) | 2,177.81 mi (3,504.85 km) |
| Ontario to Ionia (Michigan) | 1,850.53 mi (2,978.14 km) |
| Ontario to Iowa City (Iowa) | 1,509.74 mi (2,429.69 km) |
| Ontario to Irmo (South Carolina) | 2,072.62 mi (3,335.55 km) |
| Ontario to Irondale (Alabama) | 1,770.45 mi (2,849.26 km) |
| Ontario to Ironton (Ohio) | 1,957.98 mi (3,151.06 km) |
| Ontario to Irvine (California) | 26.80 mi (43.13 km) |
| Ontario to Irving (Texas) | 1,190.46 mi (1,915.86 km) |
