| Porthcawl to Mill Creek East (Washington) | 4,673.28 mi (7,520.92 km) |
| Porthcawl to Mill Valley (California) | 5,244.28 mi (8,439.85 km) |
| Porthcawl to Millbrae (California) | 5,257.65 mi (8,461.36 km) |
| Porthcawl to Millbrook (Alabama) | 4,203.43 mi (6,764.76 km) |
| Porthcawl to Millcreek (Utah) | 4,747.50 mi (7,640.36 km) |
| Porthcawl to Milledgeville (Georgia) | 4,045.43 mi (6,510.49 km) |
| Porthcawl to Miller Place (New York) | 3,263.71 mi (5,252.44 km) |
| Porthcawl to Millington (Tennessee) | 4,208.89 mi (6,773.55 km) |
| Porthcawl to Millville (New Jersey) | 3,415.71 mi (5,497.05 km) |
| Porthcawl to Milpitas (California) | 5,251.33 mi (8,451.20 km) |
| Porthcawl to Milton (Georgia) | 4,039.54 mi (6,501.02 km) |
| Porthcawl to Milwaukee (Wisconsin) | 3,770.95 mi (6,068.76 km) |
| Porthcawl to Milwaukie (Oregon) | 4,819.22 mi (7,755.78 km) |
| Porthcawl to Minden (Louisiana) | 4,478.32 mi (7,207.17 km) |
| Porthcawl to Mineola (New York) | 3,298.78 mi (5,308.87 km) |
