| Potomac to Lubbeek | 3,882.90 mi (6,248.92 km) |
| Potomac to Lummen | 3,894.69 mi (6,267.90 km) |
| Potomac to Maaseik | 3,915.06 mi (6,300.68 km) |
| Potomac to Machelen | 3,865.81 mi (6,221.41 km) |
| Potomac to Maldegem | 3,817.93 mi (6,144.36 km) |
| Potomac to Malmedy | 3,942.79 mi (6,345.31 km) |
| Potomac to Manage | 3,868.16 mi (6,225.20 km) |
| Potomac to Marche-en-Famenne | 3,920.45 mi (6,309.35 km) |
| Potomac to Mariakerke | 3,830.92 mi (6,165.27 km) |
| Potomac to Mechelen | 3,864.55 mi (6,219.40 km) |
| Potomac to Mechelen-aan-de-Maas | 3,914.53 mi (6,299.82 km) |
| Potomac to Meerhout | 3,886.07 mi (6,254.03 km) |
| Potomac to Meise | 3,861.04 mi (6,213.74 km) |
| Potomac to Melle | 3,837.77 mi (6,176.29 km) |
| Potomac to Melsele | 3,851.59 mi (6,198.54 km) |
