| Potomac to Mels | 4,181.78 mi (6,729.92 km) |
| Potomac to Mendrisio | 4,200.77 mi (6,760.49 km) |
| Potomac to Meyrin | 4,064.79 mi (6,541.65 km) |
| Potomac to Mohlin | 4,100.23 mi (6,598.69 km) |
| Potomac to Monthey | 4,101.79 mi (6,601.19 km) |
| Potomac to Montreux | 4,094.81 mi (6,589.95 km) |
| Potomac to Morges | 4,074.45 mi (6,557.19 km) |
| Potomac to Munchenstein | 4,091.86 mi (6,585.22 km) |
| Potomac to Muri | 4,103.82 mi (6,604.46 km) |
| Potomac to Muttenz | 4,093.26 mi (6,587.47 km) |
| Potomac to Naters | 4,143.97 mi (6,669.08 km) |
| Potomac to Neuchatel | 4,078.47 mi (6,563.67 km) |
| Potomac to Neuenhof | 4,123.89 mi (6,636.75 km) |
| Potomac to Neuhausen am Rheinfall | 4,128.70 mi (6,644.49 km) |
| Potomac to Niederhasli | 4,129.38 mi (6,645.60 km) |
