| Swansea to Johnstown (Pennsylvania) | 602.69 mi (969.93 km) |
| Swansea to Joliet (Illinois) | 226.90 mi (365.15 km) |
| Swansea to Jonesboro (Arkansas) | 192.41 mi (309.66 km) |
| Swansea to Joplin (Missouri) | 266.70 mi (429.21 km) |
| Swansea to Joppatowne (Maryland) | 734.00 mi (1,181.26 km) |
| Swansea to Juana Díaz (Puerto Rico) | 1,999.67 mi (3,218.16 km) |
| Swansea to Junction City (Kansas) | 371.09 mi (597.22 km) |
| Swansea to Juneau (Alaska) | 2,381.12 mi (3,832.04 km) |
| Swansea to Jupiter (Florida) | 986.04 mi (1,586.87 km) |
| Swansea to Jupiter Farms (Florida) | 982.36 mi (1,580.96 km) |
| Swansea to Jurupa Valley (California) | 1,556.74 mi (2,505.34 km) |
| Swansea to Justice (Illinois) | 248.49 mi (399.90 km) |
| Swansea to Kahului (Hawaii) | 4,082.63 mi (6,570.35 km) |
| Swansea to Kailua (Hawaii) | 4,131.91 mi (6,649.66 km) |
| Swansea to Kalamazoo (Michigan) | 345.92 mi (556.71 km) |
