| Holyhead to Jeffersonville (Indiana) | 3,816.68 mi (6,142.35 km) |
| Holyhead to Jenison (Michigan) | 3,606.64 mi (5,804.32 km) |
| Holyhead to Jenks (Oklahoma) | 4,326.15 mi (6,962.26 km) |
| Holyhead to Jennings (Missouri) | 3,973.69 mi (6,395.04 km) |
| Holyhead to Jensen Beach (Florida) | 4,149.70 mi (6,678.30 km) |
| Holyhead to Jericho (New York) | 3,222.29 mi (5,185.77 km) |
| Holyhead to Jerome (Idaho) | 4,612.25 mi (7,422.69 km) |
| Holyhead to Jersey City (New Jersey) | 3,246.49 mi (5,224.71 km) |
| Holyhead to Jessup (Maryland) | 3,425.95 mi (5,513.53 km) |
| Holyhead to Johns Creek (Georgia) | 3,967.56 mi (6,385.18 km) |
| Holyhead to Johnson City (New York) | 3,259.79 mi (5,246.12 km) |
| Holyhead to Johnson City (Tennessee) | 3,782.04 mi (6,086.61 km) |
| Holyhead to Johnston (Iowa) | 3,958.22 mi (6,370.13 km) |
| Holyhead to Johnstown (Colorado) | 4,425.21 mi (7,121.69 km) |
| Holyhead to Johnstown (Pennsylvania) | 3,457.26 mi (5,563.92 km) |
