| Glenmont to Manassas (Virginia) | 32.36 mi (52.07 km) |
| Glenmont to Manassas Park (Virginia) | 29.67 mi (47.74 km) |
| Glenmont to Manatí (Puerto Rico) | 1,560.39 mi (2,511.20 km) |
| Glenmont to Manchester (Missouri) | 724.61 mi (1,166.15 km) |
| Glenmont to Manchester (New Hampshire) | 397.86 mi (640.30 km) |
| Glenmont to Manchester (Tennessee) | 555.22 mi (893.54 km) |
| Glenmont to Manchester (Virginia) | 112.37 mi (180.84 km) |
| Glenmont to Mandan (North Dakota) | 1,312.74 mi (2,112.65 km) |
| Glenmont to Mandeville (Louisiana) | 951.97 mi (1,532.05 km) |
| Glenmont to Mango (Florida) | 822.81 mi (1,324.18 km) |
| Glenmont to Manhattan (Kansas) | 1,046.25 mi (1,683.78 km) |
| Glenmont to Manhattan (New York) | 201.62 mi (324.48 km) |
| Glenmont to Manhattan Beach (California) | 2,304.91 mi (3,709.40 km) |
| Glenmont to Manitowoc (Wisconsin) | 649.44 mi (1,045.17 km) |
| Glenmont to Mankato (Minnesota) | 940.64 mi (1,513.81 km) |
