| Swansea to Delaware (Ohio) | 387.77 mi (624.06 km) |
| Swansea to Delhi (California) | 1,670.57 mi (2,688.52 km) |
| Swansea to Delray Beach (Florida) | 1,013.87 mi (1,631.67 km) |
| Swansea to Deltona (Florida) | 834.68 mi (1,343.29 km) |
| Swansea to Deming (New Mexico) | 1,088.37 mi (1,751.57 km) |
| Swansea to Denison (Texas) | 494.30 mi (795.49 km) |
| Swansea to Dent (Ohio) | 289.84 mi (466.46 km) |
| Swansea to Denton (Texas) | 543.95 mi (875.41 km) |
| Swansea to Dentsville (South Carolina) | 589.84 mi (949.25 km) |
| Swansea to Denver (Colorado) | 801.20 mi (1,289.40 km) |
| Swansea to Depew (New York) | 662.32 mi (1,065.89 km) |
| Swansea to Derby (Connecticut) | 914.16 mi (1,471.19 km) |
| Swansea to Derby (Kansas) | 401.30 mi (645.82 km) |
| Swansea to Des Moines (Iowa) | 283.37 mi (456.04 km) |
| Swansea to Des Moines (Washington) | 1,729.77 mi (2,783.80 km) |
