| Swansea to Marrero (Louisiana) | 598.64 mi (963.42 km) |
| Swansea to Marshall (Minnesota) | 505.94 mi (814.23 km) |
| Swansea to Marshall (Missouri) | 177.37 mi (285.45 km) |
| Swansea to Marshall (Texas) | 482.43 mi (776.39 km) |
| Swansea to Marshalltown (Iowa) | 285.67 mi (459.74 km) |
| Swansea to Marshfield (Wisconsin) | 422.41 mi (679.80 km) |
| Swansea to Martha Lake (Washington) | 1,731.05 mi (2,785.85 km) |
| Swansea to Martin (Tennessee) | 165.03 mi (265.59 km) |
| Swansea to Martinez (California) | 1,734.28 mi (2,791.06 km) |
| Swansea to Martinez (Georgia) | 560.84 mi (902.59 km) |
| Swansea to Martinsburg (West Virginia) | 647.30 mi (1,041.73 km) |
| Swansea to Martinsville (Indiana) | 200.00 mi (321.86 km) |
| Swansea to Martinsville (New Jersey) | 831.73 mi (1,338.54 km) |
| Swansea to Martinsville (Virginia) | 568.49 mi (914.90 km) |
| Swansea to Maryland City (Maryland) | 709.88 mi (1,142.44 km) |
