| Ontario to Jacksonville (North Carolina) | 2,277.90 mi (3,665.93 km) |
| Ontario to Jacksonville (Texas) | 1,300.08 mi (2,092.28 km) |
| Ontario to Jacksonville Beach (Florida) | 2,122.42 mi (3,415.71 km) |
| Ontario to James Island (South Carolina) | 2,162.61 mi (3,480.39 km) |
| Ontario to Jamestown (New York) | 2,140.65 mi (3,445.05 km) |
| Ontario to Jamestown (North Dakota) | 1,327.20 mi (2,135.91 km) |
| Ontario to Janesville (Wisconsin) | 1,650.42 mi (2,656.09 km) |
| Ontario to Jasmine Estates (Florida) | 2,091.66 mi (3,366.21 km) |
| Ontario to Jasper (Alabama) | 1,732.36 mi (2,787.97 km) |
| Ontario to Jasper (Indiana) | 1,727.52 mi (2,780.18 km) |
| Ontario to Jefferson (Georgia) | 1,936.60 mi (3,116.66 km) |
| Ontario to Jefferson (Louisiana) | 1,627.92 mi (2,619.88 km) |
| Ontario to Jefferson City (Missouri) | 1,445.20 mi (2,325.82 km) |
| Ontario to Jefferson Hills (Pennsylvania) | 2,102.34 mi (3,383.39 km) |
| Ontario to Jefferson Valley-Yorktown (New York) | 2,421.16 mi (3,896.48 km) |
