| Owings Mills to Rosemont (California) | 2,369.57 mi (3,813.45 km) |
| Owings Mills to Rosemount (Minnesota) | 910.28 mi (1,464.96 km) |
| Owings Mills to Rosenberg (Texas) | 1,276.35 mi (2,054.09 km) |
| Owings Mills to Roseville (California) | 2,363.57 mi (3,803.79 km) |
| Owings Mills to Roseville (Michigan) | 385.30 mi (620.08 km) |
| Owings Mills to Roseville (Minnesota) | 920.33 mi (1,481.13 km) |
| Owings Mills to Rossmoor (California) | 2,302.63 mi (3,705.73 km) |
| Owings Mills to Rossville (Maryland) | 17.21 mi (27.70 km) |
| Owings Mills to Roswell (Georgia) | 559.14 mi (899.84 km) |
| Owings Mills to Roswell (New Mexico) | 1,591.15 mi (2,560.71 km) |
| Owings Mills to Round Lake (Illinois) | 624.26 mi (1,004.65 km) |
| Owings Mills to Round Lake Beach (Illinois) | 623.69 mi (1,003.73 km) |
| Owings Mills to Round Rock (Texas) | 1,327.20 mi (2,135.92 km) |
| Owings Mills to Rowland Heights (California) | 2,287.87 mi (3,681.98 km) |
| Owings Mills to Rowlett (Texas) | 1,186.80 mi (1,909.96 km) |
