| Swansea to Duluth (Minnesota) | 578.66 mi (931.26 km) |
| Swansea to Dumas (Texas) | 684.29 mi (1,101.25 km) |
| Swansea to Dumont (New Jersey) | 864.29 mi (1,390.94 km) |
| Swansea to Duncan (Oklahoma) | 520.08 mi (836.98 km) |
| Swansea to Duncanville (Texas) | 563.46 mi (906.80 km) |
| Swansea to Dundalk (Maryland) | 726.38 mi (1,169.00 km) |
| Swansea to Dunedin (Florida) | 836.55 mi (1,346.30 km) |
| Swansea to Dunkirk (New York) | 621.35 mi (999.97 km) |
| Swansea to Dunmore (Pennsylvania) | 785.50 mi (1,264.14 km) |
| Swansea to Dunwoody (Georgia) | 448.54 mi (721.85 km) |
| Swansea to Durango (Colorado) | 977.86 mi (1,573.72 km) |
| Swansea to Durant (Oklahoma) | 475.62 mi (765.44 km) |
| Swansea to Durham (North Carolina) | 634.36 mi (1,020.90 km) |
| Swansea to Dyer (Indiana) | 242.12 mi (389.65 km) |
| Swansea to Dyersburg (Tennessee) | 176.22 mi (283.60 km) |
