| Owings Mills to Romeoville (Illinois) | 612.92 mi (986.40 km) |
| Owings Mills to Romulus (Michigan) | 394.73 mi (635.26 km) |
| Owings Mills to Ronkonkoma (New York) | 216.30 mi (348.11 km) |
| Owings Mills to Roosevelt (New York) | 190.93 mi (307.28 km) |
| Owings Mills to Rosamond (California) | 2,283.00 mi (3,674.14 km) |
| Owings Mills to Rosaryville (Maryland) | 44.56 mi (71.71 km) |
| Owings Mills to Roscoe (Illinois) | 670.27 mi (1,078.69 km) |
| Owings Mills to Rose Hill (Virginia) | 46.37 mi (74.62 km) |
| Owings Mills to Roseburg (Oregon) | 2,399.23 mi (3,861.18 km) |
| Owings Mills to Rosedale (California) | 2,323.18 mi (3,738.79 km) |
| Owings Mills to Rosedale (Maryland) | 16.21 mi (26.09 km) |
| Owings Mills to Roselle (Illinois) | 617.19 mi (993.28 km) |
| Owings Mills to Roselle (New Jersey) | 159.02 mi (255.91 km) |
| Owings Mills to Roselle Park (New Jersey) | 159.18 mi (256.17 km) |
| Owings Mills to Rosemead (California) | 2,295.58 mi (3,694.38 km) |
