| Glenmont to Romeoville (Illinois) | 607.82 mi (978.19 km) |
| Glenmont to Romulus (Michigan) | 396.36 mi (637.87 km) |
| Glenmont to Ronkonkoma (New York) | 239.81 mi (385.94 km) |
| Glenmont to Roosevelt (New York) | 214.66 mi (345.47 km) |
| Glenmont to Rosamond (California) | 2,271.69 mi (3,655.93 km) |
| Glenmont to Rosaryville (Maryland) | 24.02 mi (38.66 km) |
| Glenmont to Roscoe (Illinois) | 666.95 mi (1,073.36 km) |
| Glenmont to Rose Hill (Virginia) | 19.81 mi (31.88 km) |
| Glenmont to Roseburg (Oregon) | 2,395.37 mi (3,854.98 km) |
| Glenmont to Rosedale (California) | 2,312.47 mi (3,721.57 km) |
| Glenmont to Rosedale (Maryland) | 33.85 mi (54.47 km) |
| Glenmont to Roselle (Illinois) | 613.13 mi (986.74 km) |
| Glenmont to Roselle (New Jersey) | 183.85 mi (295.88 km) |
| Glenmont to Roselle Park (New Jersey) | 184.07 mi (296.24 km) |
| Glenmont to Rosemead (California) | 2,283.65 mi (3,675.18 km) |
