| Potomac to Missouri City (Texas) | 1,230.38 mi (1,980.10 km) |
| Potomac to Mitchell (South Dakota) | 1,125.09 mi (1,810.66 km) |
| Potomac to Mitchellville (Maryland) | 21.10 mi (33.96 km) |
| Potomac to Moberly (Missouri) | 815.44 mi (1,312.32 km) |
| Potomac to Mobile (Alabama) | 844.53 mi (1,359.14 km) |
| Potomac to Modesto (California) | 2,353.33 mi (3,787.32 km) |
| Potomac to Mokena (Illinois) | 589.02 mi (947.93 km) |
| Potomac to Moline (Illinois) | 720.89 mi (1,160.16 km) |
| Potomac to Moncks Corner (South Carolina) | 433.07 mi (696.95 km) |
| Potomac to Monfort Heights (Ohio) | 397.56 mi (639.81 km) |
| Potomac to Monmouth (Oregon) | 2,367.89 mi (3,810.76 km) |
| Potomac to Monroe (Georgia) | 510.95 mi (822.30 km) |
| Potomac to Monroe (Louisiana) | 945.72 mi (1,521.98 km) |
| Potomac to Monroe (Michigan) | 382.06 mi (614.86 km) |
| Potomac to Monroe (North Carolina) | 333.34 mi (536.45 km) |
