| Llanelli to Marshall (Minnesota) | 3,974.88 mi (6,396.95 km) |
| Llanelli to Marshall (Missouri) | 4,131.58 mi (6,649.14 km) |
| Llanelli to Marshall (Texas) | 4,501.30 mi (7,244.13 km) |
| Llanelli to Marshalltown (Iowa) | 3,981.56 mi (6,407.70 km) |
| Llanelli to Marshfield (Wisconsin) | 3,758.26 mi (6,048.33 km) |
| Llanelli to Martha Lake (Washington) | 4,650.04 mi (7,483.51 km) |
| Llanelli to Martin (Tennessee) | 4,094.42 mi (6,589.33 km) |
| Llanelli to Martinez (California) | 5,201.67 mi (8,371.29 km) |
| Llanelli to Martinez (Georgia) | 3,953.94 mi (6,363.25 km) |
| Llanelli to Martinsburg (West Virginia) | 3,509.78 mi (5,648.44 km) |
| Llanelli to Martinsville (Indiana) | 3,852.90 mi (6,200.64 km) |
| Llanelli to Martinsville (New Jersey) | 3,320.14 mi (5,343.25 km) |
| Llanelli to Martinsville (Virginia) | 3,712.76 mi (5,975.12 km) |
| Llanelli to Maryland City (Maryland) | 3,477.34 mi (5,596.24 km) |
| Llanelli to Maryland Heights (Missouri) | 4,044.80 mi (6,509.48 km) |
