| Owings Mills to Rockville (Maryland) | 29.89 mi (48.10 km) |
| Owings Mills to Rockville Centre (New York) | 187.90 mi (302.39 km) |
| Owings Mills to Rockwall (Texas) | 1,181.03 mi (1,900.69 km) |
| Owings Mills to Rocky Mount (North Carolina) | 244.24 mi (393.07 km) |
| Owings Mills to Rocky Point (New York) | 229.12 mi (368.73 km) |
| Owings Mills to Rocky River (Ohio) | 301.70 mi (485.54 km) |
| Owings Mills to Roessleville (New York) | 275.41 mi (443.24 km) |
| Owings Mills to Rogers (Arkansas) | 969.21 mi (1,559.80 km) |
| Owings Mills to Rogers (Minnesota) | 943.73 mi (1,518.78 km) |
| Owings Mills to Rohnert Park (California) | 2,443.12 mi (3,931.82 km) |
| Owings Mills to Rolla (Missouri) | 812.80 mi (1,308.07 km) |
| Owings Mills to Rolling Meadows (Illinois) | 615.64 mi (990.78 km) |
| Owings Mills to Roma (Texas) | 1,563.36 mi (2,515.99 km) |
| Owings Mills to Rome (Georgia) | 584.26 mi (940.27 km) |
| Owings Mills to Rome (New York) | 272.05 mi (437.82 km) |
