| Ontario to Jeffersontown (Kentucky) | 1,801.83 mi (2,899.77 km) |
| Ontario to Jeffersonville (Indiana) | 1,794.56 mi (2,888.06 km) |
| Ontario to Jenison (Michigan) | 1,812.08 mi (2,916.26 km) |
| Ontario to Jenks (Oklahoma) | 1,229.00 mi (1,977.89 km) |
| Ontario to Jennings (Missouri) | 1,548.85 mi (2,492.63 km) |
| Ontario to Jensen Beach (Florida) | 2,257.27 mi (3,632.73 km) |
| Ontario to Jericho (New York) | 2,436.57 mi (3,921.28 km) |
| Ontario to Jerome (Idaho) | 622.43 mi (1,001.71 km) |
| Ontario to Jersey City (New Jersey) | 2,409.31 mi (3,877.41 km) |
| Ontario to Jessup (Maryland) | 2,272.95 mi (3,657.96 km) |
| Ontario to Johns Creek (Georgia) | 1,903.90 mi (3,064.03 km) |
| Ontario to Johnson City (New York) | 2,308.47 mi (3,715.13 km) |
| Ontario to Johnson City (Tennessee) | 1,984.46 mi (3,193.68 km) |
| Ontario to Johnston (Iowa) | 1,400.05 mi (2,253.17 km) |
| Ontario to Johnstown (Colorado) | 820.63 mi (1,320.67 km) |
