| Didcot to Jeffersonville (Indiana) | 3,992.19 mi (6,424.81 km) |
| Didcot to Jenison (Michigan) | 3,785.95 mi (6,092.91 km) |
| Didcot to Jenks (Oklahoma) | 4,505.96 mi (7,251.65 km) |
| Didcot to Jennings (Missouri) | 4,152.25 mi (6,682.40 km) |
| Didcot to Jensen Beach (Florida) | 4,307.68 mi (6,932.55 km) |
| Didcot to Jericho (New York) | 3,391.35 mi (5,457.86 km) |
| Didcot to Jerome (Idaho) | 4,796.98 mi (7,720.00 km) |
| Didcot to Jersey City (New Jersey) | 3,415.90 mi (5,497.36 km) |
| Didcot to Jessup (Maryland) | 3,595.60 mi (5,786.56 km) |
| Didcot to Johns Creek (Georgia) | 4,137.75 mi (6,659.07 km) |
| Didcot to Johnson City (New York) | 3,432.47 mi (5,524.02 km) |
| Didcot to Johnson City (Tennessee) | 3,953.12 mi (6,361.94 km) |
| Didcot to Johnston (Iowa) | 4,140.11 mi (6,662.86 km) |
| Didcot to Johnstown (Colorado) | 4,609.62 mi (7,418.47 km) |
| Didcot to Johnstown (Pennsylvania) | 3,630.00 mi (5,841.93 km) |
