| Llantrisant to Mendota Heights (Minnesota) | 3,892.20 mi (6,263.90 km) |
| Llantrisant to Menifee (California) | 5,318.09 mi (8,558.64 km) |
| Llantrisant to Menlo Park (California) | 5,264.60 mi (8,472.56 km) |
| Llantrisant to Menomonee Falls (Wisconsin) | 3,783.22 mi (6,088.50 km) |
| Llantrisant to Menomonie (Wisconsin) | 3,846.62 mi (6,190.54 km) |
| Llantrisant to Mentor (Ohio) | 3,582.70 mi (5,765.80 km) |
| Llantrisant to Mequon (Wisconsin) | 3,774.02 mi (6,073.70 km) |
| Llantrisant to Merced (California) | 5,221.33 mi (8,402.92 km) |
| Llantrisant to Mercedes (Texas) | 5,008.10 mi (8,059.76 km) |
| Llantrisant to Mercer Island (Washington) | 4,694.90 mi (7,555.71 km) |
| Llantrisant to Mercerville (New Jersey) | 3,375.90 mi (5,432.98 km) |
| Llantrisant to Meriden (Connecticut) | 3,242.51 mi (5,218.31 km) |
| Llantrisant to Meridian (Idaho) | 4,743.45 mi (7,633.84 km) |
| Llantrisant to Meridian (Mississippi) | 4,315.82 mi (6,945.64 km) |
| Llantrisant to Merriam (Kansas) | 4,227.95 mi (6,804.22 km) |
