| Penarth to Merrick (New York) | 3,321.74 mi (5,345.82 km) |
| Penarth to Merrifield (Virginia) | 3,551.36 mi (5,715.36 km) |
| Penarth to Merrillville (Indiana) | 3,839.48 mi (6,179.04 km) |
| Penarth to Merritt Island (Florida) | 4,192.87 mi (6,747.77 km) |
| Penarth to Mesa (Arizona) | 5,157.29 mi (8,299.86 km) |
| Penarth to Mesquite (Nevada) | 5,054.54 mi (8,134.49 km) |
| Penarth to Mesquite (Texas) | 4,624.52 mi (7,442.44 km) |
| Penarth to Metairie (Louisiana) | 4,506.51 mi (7,252.52 km) |
| Penarth to Methuen Town (Massachusetts) | 3,137.87 mi (5,049.91 km) |
| Penarth to Metuchen (New Jersey) | 3,359.83 mi (5,407.13 km) |
| Penarth to Mexico (Missouri) | 4,124.03 mi (6,636.99 km) |
| Penarth to Miami (Florida) | 4,299.37 mi (6,919.17 km) |
| Penarth to Miami (Oklahoma) | 4,350.61 mi (7,001.63 km) |
| Penarth to Miami Beach (Florida) | 4,294.70 mi (6,911.65 km) |
| Penarth to Miami Gardens (Florida) | 4,292.76 mi (6,908.53 km) |
