| Holyhead to Jacksonville (Texas) | 4,507.12 mi (7,253.51 km) |
| Holyhead to Jacksonville Beach (Florida) | 4,042.51 mi (6,505.80 km) |
| Holyhead to James Island (South Carolina) | 3,860.10 mi (6,212.22 km) |
| Holyhead to Jamestown (New York) | 3,389.68 mi (5,455.16 km) |
| Holyhead to Jamestown (North Dakota) | 3,881.36 mi (6,246.45 km) |
| Holyhead to Janesville (Wisconsin) | 3,736.57 mi (6,013.43 km) |
| Holyhead to Jasmine Estates (Florida) | 4,195.98 mi (6,752.77 km) |
| Holyhead to Jasper (Alabama) | 4,098.57 mi (6,596.02 km) |
| Holyhead to Jasper (Indiana) | 3,862.06 mi (6,215.38 km) |
| Holyhead to Jefferson (Georgia) | 3,938.42 mi (6,338.28 km) |
| Holyhead to Jefferson (Louisiana) | 4,410.94 mi (7,098.72 km) |
| Holyhead to Jefferson City (Missouri) | 4,053.81 mi (6,523.98 km) |
| Holyhead to Jefferson Hills (Pennsylvania) | 3,498.78 mi (5,630.74 km) |
| Holyhead to Jefferson Valley-Yorktown (New York) | 3,209.22 mi (5,164.75 km) |
| Holyhead to Jeffersontown (Kentucky) | 3,817.90 mi (6,144.31 km) |
