| Porthcawl to Mountain Brook (Alabama) | 4,170.54 mi (6,711.83 km) |
| Porthcawl to Mountain Home (Arkansas) | 4,258.93 mi (6,854.08 km) |
| Porthcawl to Mountain Home (Idaho) | 4,740.97 mi (7,629.85 km) |
| Porthcawl to Mountain House (California) | 5,221.56 mi (8,403.29 km) |
| Porthcawl to Mountain Park (Georgia) | 4,045.88 mi (6,511.22 km) |
| Porthcawl to Mountain Top (Pennsylvania) | 3,375.57 mi (5,432.46 km) |
| Porthcawl to Mountain View (California) | 5,259.05 mi (8,463.63 km) |
| Porthcawl to Mountlake Terrace (Washington) | 4,679.03 mi (7,530.17 km) |
| Porthcawl to Mukilteo (Washington) | 4,672.36 mi (7,519.44 km) |
| Porthcawl to Muncie (Indiana) | 3,799.94 mi (6,115.41 km) |
| Porthcawl to Mundelein (Illinois) | 3,808.42 mi (6,129.07 km) |
| Porthcawl to Munhall (Pennsylvania) | 3,570.64 mi (5,746.39 km) |
| Porthcawl to Munster (Indiana) | 3,821.57 mi (6,150.22 km) |
| Porthcawl to Murfreesboro (Tennessee) | 4,043.54 mi (6,507.45 km) |
| Porthcawl to Murphy (Texas) | 4,590.48 mi (7,387.67 km) |
