| Glenmont to Rockville (Maryland) | 5.90 mi (9.50 km) |
| Glenmont to Rockville Centre (New York) | 211.66 mi (340.63 km) |
| Glenmont to Rockwall (Texas) | 1,161.44 mi (1,869.15 km) |
| Glenmont to Rocky Mount (North Carolina) | 218.26 mi (351.25 km) |
| Glenmont to Rocky Point (New York) | 252.83 mi (406.90 km) |
| Glenmont to Rocky River (Ohio) | 302.74 mi (487.21 km) |
| Glenmont to Roessleville (New York) | 302.65 mi (487.07 km) |
| Glenmont to Rogers (Arkansas) | 952.88 mi (1,533.51 km) |
| Glenmont to Rogers (Minnesota) | 944.26 mi (1,519.64 km) |
| Glenmont to Rohnert Park (California) | 2,435.32 mi (3,919.27 km) |
| Glenmont to Rolla (Missouri) | 798.44 mi (1,284.97 km) |
| Glenmont to Rolling Meadows (Illinois) | 611.89 mi (984.75 km) |
| Glenmont to Roma (Texas) | 1,540.17 mi (2,478.66 km) |
| Glenmont to Rome (Georgia) | 559.65 mi (900.67 km) |
| Glenmont to Rome (New York) | 298.34 mi (480.13 km) |
