| Pontneddfechan to Jeffersonville (Indiana) | 3,895.04 mi (6,268.47 km) |
| Pontneddfechan to Jenison (Michigan) | 3,691.12 mi (5,940.28 km) |
| Pontneddfechan to Jenks (Oklahoma) | 4,411.43 mi (7,099.51 km) |
| Pontneddfechan to Jennings (Missouri) | 4,056.82 mi (6,528.82 km) |
| Pontneddfechan to Jensen Beach (Florida) | 4,206.77 mi (6,770.14 km) |
| Pontneddfechan to Jericho (New York) | 3,292.04 mi (5,298.03 km) |
| Pontneddfechan to Jerome (Idaho) | 4,716.55 mi (7,590.55 km) |
| Pontneddfechan to Jersey City (New Jersey) | 3,316.68 mi (5,337.67 km) |
| Pontneddfechan to Jessup (Maryland) | 3,496.42 mi (5,626.94 km) |
| Pontneddfechan to Johns Creek (Georgia) | 4,038.67 mi (6,499.60 km) |
| Pontneddfechan to Johnson City (New York) | 3,334.23 mi (5,365.92 km) |
| Pontneddfechan to Johnson City (Tennessee) | 3,854.31 mi (6,202.91 km) |
| Pontneddfechan to Johnston (Iowa) | 4,047.66 mi (6,514.08 km) |
| Pontneddfechan to Johnstown (Colorado) | 4,521.81 mi (7,277.15 km) |
| Pontneddfechan to Johnstown (Pennsylvania) | 3,531.76 mi (5,683.83 km) |
