| Porthcawl to Merrick (New York) | 3,299.27 mi (5,309.66 km) |
| Porthcawl to Merrifield (Virginia) | 3,528.91 mi (5,679.23 km) |
| Porthcawl to Merrillville (Indiana) | 3,817.75 mi (6,144.07 km) |
| Porthcawl to Merritt Island (Florida) | 4,170.22 mi (6,711.32 km) |
| Porthcawl to Mesa (Arizona) | 5,136.91 mi (8,267.06 km) |
| Porthcawl to Mesquite (Nevada) | 5,034.86 mi (8,102.82 km) |
| Porthcawl to Mesquite (Texas) | 4,602.66 mi (7,407.26 km) |
| Porthcawl to Metairie (Louisiana) | 4,484.12 mi (7,216.49 km) |
| Porthcawl to Methuen Town (Massachusetts) | 3,115.44 mi (5,013.81 km) |
| Porthcawl to Metuchen (New Jersey) | 3,337.38 mi (5,370.99 km) |
| Porthcawl to Mexico (Missouri) | 4,102.39 mi (6,602.15 km) |
| Porthcawl to Miami (Florida) | 4,276.73 mi (6,882.73 km) |
| Porthcawl to Miami (Oklahoma) | 4,328.97 mi (6,966.81 km) |
| Porthcawl to Miami Beach (Florida) | 4,272.05 mi (6,875.20 km) |
| Porthcawl to Miami Gardens (Florida) | 4,270.12 mi (6,872.09 km) |
