| Mackworth to Jeffersonville (Indiana) | 3,946.12 mi (6,350.67 km) |
| Mackworth to Jenison (Michigan) | 3,734.25 mi (6,009.69 km) |
| Mackworth to Jenks (Oklahoma) | 4,453.35 mi (7,166.97 km) |
| Mackworth to Jennings (Missouri) | 4,101.74 mi (6,601.11 km) |
| Mackworth to Jensen Beach (Florida) | 4,280.43 mi (6,888.69 km) |
| Mackworth to Jericho (New York) | 3,353.11 mi (5,396.31 km) |
| Mackworth to Jerome (Idaho) | 4,724.94 mi (7,604.05 km) |
| Mackworth to Jersey City (New Jersey) | 3,377.27 mi (5,435.19 km) |
| Mackworth to Jessup (Maryland) | 3,556.70 mi (5,723.95 km) |
| Mackworth to Johns Creek (Georgia) | 4,098.23 mi (6,595.46 km) |
| Mackworth to Johnson City (New York) | 3,390.05 mi (5,455.76 km) |
| Mackworth to Johnson City (Tennessee) | 3,912.58 mi (6,296.68 km) |
| Mackworth to Johnston (Iowa) | 4,083.58 mi (6,571.88 km) |
| Mackworth to Johnstown (Colorado) | 4,545.86 mi (7,315.85 km) |
| Mackworth to Johnstown (Pennsylvania) | 3,587.49 mi (5,773.51 km) |
