| Potomac to Luzzara | 4,302.77 mi (6,924.64 km) |
| Potomac to Luzzi | 4,745.22 mi (7,636.70 km) |
| Potomac to Macerata | 4,479.16 mi (7,208.51 km) |
| Potomac to Macerata Campania | 4,595.29 mi (7,395.40 km) |
| Potomac to Macomer | 4,377.36 mi (7,044.69 km) |
| Potomac to Maddaloni | 4,601.66 mi (7,405.66 km) |
| Potomac to Magenta | 4,209.13 mi (6,773.95 km) |
| Potomac to Magione | 4,430.11 mi (7,129.57 km) |
| Potomac to Maglie | 4,800.95 mi (7,726.38 km) |
| Potomac to Magnago | 4,202.16 mi (6,762.73 km) |
| Potomac to Malalbergo | 4,347.57 mi (6,996.73 km) |
| Potomac to Malnate | 4,198.61 mi (6,757.01 km) |
| Potomac to Malo | 4,310.54 mi (6,937.14 km) |
| Potomac to Mandello del Lario | 4,213.41 mi (6,780.83 km) |
| Potomac to Manduria | 4,768.14 mi (7,673.58 km) |
