| Cwmbran to Joliet (Illinois) | 3,868.67 mi (6,226.02 km) |
| Cwmbran to Jonesboro (Arkansas) | 4,238.43 mi (6,821.10 km) |
| Cwmbran to Joplin (Missouri) | 4,326.04 mi (6,962.10 km) |
| Cwmbran to Joppatowne (Maryland) | 3,492.30 mi (5,620.32 km) |
| Cwmbran to Juana Díaz (Puerto Rico) | 4,116.28 mi (6,624.51 km) |
| Cwmbran to Junction City (Kansas) | 4,318.74 mi (6,950.33 km) |
| Cwmbran to Juneau (Alaska) | 4,349.41 mi (6,999.70 km) |
| Cwmbran to Jupiter (Florida) | 4,242.51 mi (6,827.66 km) |
| Cwmbran to Jupiter Farms (Florida) | 4,246.90 mi (6,834.73 km) |
| Cwmbran to Jurupa Valley (California) | 5,317.21 mi (8,557.22 km) |
| Cwmbran to Justice (Illinois) | 3,845.90 mi (6,189.38 km) |
| Cwmbran to Kahului (Hawaii) | 7,174.26 mi (11,545.85 km) |
| Cwmbran to Kailua (Hawaii) | 7,162.75 mi (11,527.33 km) |
| Cwmbran to Kalamazoo (Michigan) | 3,735.10 mi (6,011.07 km) |
| Cwmbran to Kalispell (Montana) | 4,438.66 mi (7,143.33 km) |
