| Longford to Mauldin (South Carolina) | 3,721.48 mi (5,989.15 km) |
| Longford to Maumee (Ohio) | 3,453.34 mi (5,557.61 km) |
| Longford to Maumelle (Arkansas) | 4,116.26 mi (6,624.47 km) |
| Longford to Mayagüez (Puerto Rico) | 3,967.62 mi (6,385.27 km) |
| Longford to Mayfield Heights (Ohio) | 3,369.76 mi (5,423.10 km) |
| Longford to Mays Chapel (Maryland) | 3,274.59 mi (5,269.94 km) |
| Longford to Maywood (California) | 5,095.76 mi (8,200.84 km) |
| Longford to Maywood (Illinois) | 3,599.41 mi (5,792.69 km) |
| Longford to McAlester (Oklahoma) | 4,242.22 mi (6,827.19 km) |
| Longford to McAllen (Texas) | 4,793.88 mi (7,715.01 km) |
| Longford to McCalla (Alabama) | 3,983.41 mi (6,410.68 km) |
| Longford to McComb (Mississippi) | 4,224.29 mi (6,798.33 km) |
| Longford to McDonough (Georgia) | 3,861.69 mi (6,214.79 km) |
| Longford to McFarland (California) | 5,034.89 mi (8,102.88 km) |
| Longford to McHenry (Illinois) | 3,595.08 mi (5,785.72 km) |
