| Longford to McKeesport (Pennsylvania) | 3,360.04 mi (5,407.47 km) |
| Longford to McKinleyville (California) | 4,885.02 mi (7,861.68 km) |
| Longford to McKinney (Texas) | 4,365.02 mi (7,024.82 km) |
| Longford to McLean (Virginia) | 3,318.84 mi (5,341.15 km) |
| Longford to McMinnville (Oregon) | 4,617.59 mi (7,431.30 km) |
| Longford to McMinnville (Tennessee) | 3,815.65 mi (6,140.69 km) |
| Longford to McNair (Virginia) | 3,327.17 mi (5,354.57 km) |
| Longford to McPherson (Kansas) | 4,138.34 mi (6,660.02 km) |
| Longford to Mead Valley (California) | 5,074.50 mi (8,166.63 km) |
| Longford to Meadow Woods (Florida) | 4,004.60 mi (6,444.78 km) |
| Longford to Meadowbrook (Virginia) | 3,400.54 mi (5,472.64 km) |
| Longford to Meadville (Pennsylvania) | 3,312.76 mi (5,331.37 km) |
| Longford to Mebane (North Carolina) | 3,536.76 mi (5,691.87 km) |
| Longford to Mechanicsville (Virginia) | 3,386.59 mi (5,450.19 km) |
| Longford to Medford (Massachusetts) | 2,920.23 mi (4,699.66 km) |
