| Llantrisant to Jacksonville (Texas) | 4,601.50 mi (7,405.40 km) |
| Llantrisant to Jacksonville Beach (Florida) | 4,117.11 mi (6,625.85 km) |
| Llantrisant to James Island (South Carolina) | 3,936.58 mi (6,335.32 km) |
| Llantrisant to Jamestown (New York) | 3,480.96 mi (5,602.06 km) |
| Llantrisant to Jamestown (North Dakota) | 3,995.65 mi (6,430.38 km) |
| Llantrisant to Janesville (Wisconsin) | 3,838.24 mi (6,177.05 km) |
| Llantrisant to Jasmine Estates (Florida) | 4,269.35 mi (6,870.85 km) |
| Llantrisant to Jasper (Alabama) | 4,186.09 mi (6,736.87 km) |
| Llantrisant to Jasper (Indiana) | 3,955.67 mi (6,366.04 km) |
| Llantrisant to Jefferson (Georgia) | 4,021.87 mi (6,472.57 km) |
| Llantrisant to Jefferson (Louisiana) | 4,496.68 mi (7,236.71 km) |
| Llantrisant to Jefferson City (Missouri) | 4,153.05 mi (6,683.70 km) |
| Llantrisant to Jefferson Hills (Pennsylvania) | 3,587.74 mi (5,773.91 km) |
| Llantrisant to Jefferson Valley-Yorktown (New York) | 3,293.12 mi (5,299.76 km) |
| Llantrisant to Jeffersontown (Kentucky) | 3,909.76 mi (6,292.15 km) |
