| Porthcawl to Mineral Wells (Texas) | 4,658.24 mi (7,496.71 km) |
| Porthcawl to Minneapolis (Minnesota) | 3,883.84 mi (6,250.44 km) |
| Porthcawl to Minnehaha (Washington) | 4,807.19 mi (7,736.42 km) |
| Porthcawl to Minneola (Florida) | 4,200.74 mi (6,760.44 km) |
| Porthcawl to Minnetonka (Minnesota) | 3,892.30 mi (6,264.06 km) |
| Porthcawl to Minooka (Illinois) | 3,856.09 mi (6,205.77 km) |
| Porthcawl to Minot (North Dakota) | 4,012.54 mi (6,457.56 km) |
| Porthcawl to Mint Hill (North Carolina) | 3,838.62 mi (6,177.66 km) |
| Porthcawl to Miramar (Florida) | 4,272.36 mi (6,875.70 km) |
| Porthcawl to Mishawaka (Indiana) | 3,763.59 mi (6,056.91 km) |
| Porthcawl to Mission (Texas) | 5,010.87 mi (8,064.22 km) |
| Porthcawl to Mission Bend (Texas) | 4,722.56 mi (7,600.22 km) |
| Porthcawl to Mission Viejo (California) | 5,330.54 mi (8,578.67 km) |
| Porthcawl to Missoula (Montana) | 4,488.88 mi (7,224.15 km) |
| Porthcawl to Missouri City (Texas) | 4,724.12 mi (7,602.74 km) |
