| Porthcawl to Mitchell (South Dakota) | 4,114.70 mi (6,621.96 km) |
| Porthcawl to Mitchellville (Maryland) | 3,508.45 mi (5,646.31 km) |
| Porthcawl to Moberly (Missouri) | 4,112.05 mi (6,617.70 km) |
| Porthcawl to Mobile (Alabama) | 4,365.21 mi (7,025.13 km) |
| Porthcawl to Modesto (California) | 5,212.03 mi (8,387.96 km) |
| Porthcawl to Mokena (Illinois) | 3,836.77 mi (6,174.68 km) |
| Porthcawl to Moline (Illinois) | 3,940.05 mi (6,340.89 km) |
| Porthcawl to Moncks Corner (South Carolina) | 3,906.43 mi (6,286.79 km) |
| Porthcawl to Monfort Heights (Ohio) | 3,814.92 mi (6,139.53 km) |
| Porthcawl to Monmouth (Oregon) | 4,869.79 mi (7,837.17 km) |
| Porthcawl to Monroe (Georgia) | 4,030.96 mi (6,487.20 km) |
| Porthcawl to Monroe (Louisiana) | 4,435.18 mi (7,137.73 km) |
| Porthcawl to Monroe (Michigan) | 3,643.31 mi (5,863.34 km) |
| Porthcawl to Monroe (North Carolina) | 3,842.80 mi (6,184.39 km) |
| Porthcawl to Monroe (Ohio) | 3,793.21 mi (6,104.59 km) |
