| Merthyr Tudful to Murray (Kentucky) | 4,089.82 mi (6,581.92 km) |
| Merthyr Tudful to Murray (Utah) | 4,750.35 mi (7,644.94 km) |
| Merthyr Tudful to Murraysville (North Carolina) | 3,771.81 mi (6,070.14 km) |
| Merthyr Tudful to Murrieta (California) | 5,316.21 mi (8,555.62 km) |
| Merthyr Tudful to Murrysville (Pennsylvania) | 3,565.01 mi (5,737.32 km) |
| Merthyr Tudful to Muscatine (Iowa) | 3,968.61 mi (6,386.87 km) |
| Merthyr Tudful to Muscle Shoals (Alabama) | 4,152.78 mi (6,683.25 km) |
| Merthyr Tudful to Muscoy (California) | 5,288.66 mi (8,511.28 km) |
| Merthyr Tudful to Muskego (Wisconsin) | 3,788.92 mi (6,097.68 km) |
| Merthyr Tudful to Muskegon (Michigan) | 3,701.77 mi (5,957.43 km) |
| Merthyr Tudful to Muskogee (Oklahoma) | 4,408.85 mi (7,095.35 km) |
| Merthyr Tudful to Mustang (Oklahoma) | 4,517.63 mi (7,270.43 km) |
| Merthyr Tudful to Myers Corner (New York) | 3,280.87 mi (5,280.05 km) |
| Merthyr Tudful to Myrtle Beach (South Carolina) | 3,842.85 mi (6,184.47 km) |
| Merthyr Tudful to Myrtle Grove (Florida) | 4,352.58 mi (7,004.79 km) |
