| Porthcawl to Marshall (Minnesota) | 3,999.58 mi (6,436.70 km) |
| Porthcawl to Marshall (Missouri) | 4,156.04 mi (6,688.49 km) |
| Porthcawl to Marshall (Texas) | 4,525.40 mi (7,282.92 km) |
| Porthcawl to Marshalltown (Iowa) | 4,006.14 mi (6,447.25 km) |
| Porthcawl to Marshfield (Wisconsin) | 3,782.87 mi (6,087.94 km) |
| Porthcawl to Martha Lake (Washington) | 4,673.86 mi (7,521.85 km) |
| Porthcawl to Martin (Tennessee) | 4,118.46 mi (6,628.01 km) |
| Porthcawl to Martinez (California) | 5,226.06 mi (8,410.54 km) |
| Porthcawl to Martinez (Georgia) | 3,977.11 mi (6,400.54 km) |
| Porthcawl to Martinsburg (West Virginia) | 3,533.33 mi (5,686.35 km) |
| Porthcawl to Martinsville (Indiana) | 3,877.04 mi (6,239.50 km) |
| Porthcawl to Martinsville (New Jersey) | 3,343.57 mi (5,380.95 km) |
| Porthcawl to Martinsville (Virginia) | 3,736.13 mi (6,012.72 km) |
| Porthcawl to Maryland City (Maryland) | 3,500.75 mi (5,633.91 km) |
| Porthcawl to Maryland Heights (Missouri) | 4,069.11 mi (6,548.60 km) |
