| Owings Mills to Robertsville (New Jersey) | 147.12 mi (236.77 km) |
| Owings Mills to Robinson (Texas) | 1,265.88 mi (2,037.23 km) |
| Owings Mills to Robstown (Texas) | 1,439.23 mi (2,316.21 km) |
| Owings Mills to Rochester (Michigan) | 399.75 mi (643.34 km) |
| Owings Mills to Rochester (Minnesota) | 867.63 mi (1,396.31 km) |
| Owings Mills to Rochester (New Hampshire) | 403.58 mi (649.49 km) |
| Owings Mills to Rochester (New York) | 263.05 mi (423.34 km) |
| Owings Mills to Rochester Hills (Michigan) | 400.51 mi (644.55 km) |
| Owings Mills to Rock Hill (South Carolina) | 386.79 mi (622.47 km) |
| Owings Mills to Rock Island (Illinois) | 738.19 mi (1,188.01 km) |
| Owings Mills to Rock Springs (Wyoming) | 1,700.36 mi (2,736.46 km) |
| Owings Mills to Rockford (Illinois) | 670.35 mi (1,078.83 km) |
| Owings Mills to Rockledge (Florida) | 798.81 mi (1,285.56 km) |
| Owings Mills to Rocklin (California) | 2,359.21 mi (3,796.78 km) |
| Owings Mills to Rockport (Texas) | 1,400.74 mi (2,254.27 km) |
