| Porthcawl to Jeffersonville (Indiana) | 3,897.81 mi (6,272.93 km) |
| Porthcawl to Jenison (Michigan) | 3,695.32 mi (5,947.05 km) |
| Porthcawl to Jenks (Oklahoma) | 4,415.76 mi (7,106.48 km) |
| Porthcawl to Jennings (Missouri) | 4,060.67 mi (6,535.01 km) |
| Porthcawl to Jensen Beach (Florida) | 4,205.10 mi (6,767.46 km) |
| Porthcawl to Jericho (New York) | 3,293.02 mi (5,299.60 km) |
| Porthcawl to Jerome (Idaho) | 4,726.14 mi (7,605.98 km) |
| Porthcawl to Jersey City (New Jersey) | 3,317.74 mi (5,339.38 km) |
| Porthcawl to Jessup (Maryland) | 3,497.52 mi (5,628.71 km) |
| Porthcawl to Johns Creek (Georgia) | 4,039.84 mi (6,501.50 km) |
| Porthcawl to Johnson City (New York) | 3,336.19 mi (5,369.09 km) |
| Porthcawl to Johnson City (Tennessee) | 3,855.75 mi (6,205.23 km) |
| Porthcawl to Johnston (Iowa) | 4,053.05 mi (6,522.76 km) |
| Porthcawl to Johnstown (Colorado) | 4,529.06 mi (7,288.82 km) |
| Porthcawl to Johnstown (Pennsylvania) | 3,533.72 mi (5,686.97 km) |
