| Port Talbot to Joliet (Illinois) | 3,840.46 mi (6,180.62 km) |
| Port Talbot to Jonesboro (Arkansas) | 4,209.22 mi (6,774.09 km) |
| Port Talbot to Joplin (Missouri) | 4,297.90 mi (6,916.80 km) |
| Port Talbot to Joppatowne (Maryland) | 3,461.51 mi (5,570.76 km) |
| Port Talbot to Juana Díaz (Puerto Rico) | 4,082.67 mi (6,570.43 km) |
| Port Talbot to Junction City (Kansas) | 4,291.61 mi (6,906.67 km) |
| Port Talbot to Juneau (Alaska) | 4,338.42 mi (6,982.01 km) |
| Port Talbot to Jupiter (Florida) | 4,210.06 mi (6,775.44 km) |
| Port Talbot to Jupiter Farms (Florida) | 4,214.47 mi (6,782.53 km) |
| Port Talbot to Jurupa Valley (California) | 5,293.98 mi (8,519.84 km) |
| Port Talbot to Justice (Illinois) | 3,817.70 mi (6,144.00 km) |
| Port Talbot to Kahului (Hawaii) | 7,163.60 mi (11,528.70 km) |
| Port Talbot to Kailua (Hawaii) | 7,152.83 mi (11,511.36 km) |
| Port Talbot to Kalamazoo (Michigan) | 3,706.63 mi (5,965.25 km) |
| Port Talbot to Kalispell (Montana) | 4,418.69 mi (7,111.20 km) |
