| Llanelli to Mendota Heights (Minnesota) | 3,858.23 mi (6,209.22 km) |
| Llanelli to Menifee (California) | 5,285.48 mi (8,506.16 km) |
| Llanelli to Menlo Park (California) | 5,233.46 mi (8,422.44 km) |
| Llanelli to Menomonee Falls (Wisconsin) | 3,748.63 mi (6,032.84 km) |
| Llanelli to Menomonie (Wisconsin) | 3,812.54 mi (6,135.69 km) |
| Llanelli to Mentor (Ohio) | 3,547.65 mi (5,709.39 km) |
| Llanelli to Mequon (Wisconsin) | 3,739.43 mi (6,018.04 km) |
| Llanelli to Merced (California) | 5,189.84 mi (8,352.24 km) |
| Llanelli to Mercedes (Texas) | 4,972.97 mi (8,003.22 km) |
| Llanelli to Mercer Island (Washington) | 4,665.70 mi (7,508.72 km) |
| Llanelli to Mercerville (New Jersey) | 3,340.70 mi (5,376.33 km) |
| Llanelli to Meriden (Connecticut) | 3,207.30 mi (5,161.66 km) |
| Llanelli to Meridian (Idaho) | 4,712.33 mi (7,583.76 km) |
| Llanelli to Meridian (Mississippi) | 4,280.64 mi (6,889.02 km) |
| Llanelli to Merriam (Kansas) | 4,193.40 mi (6,748.63 km) |
