| Havre de Grace to Rockville (Maryland) | 64.23 mi (103.36 km) |
| Havre de Grace to Rockville Centre (New York) | 151.89 mi (244.45 km) |
| Havre de Grace to Rockwall (Texas) | 1,218.32 mi (1,960.70 km) |
| Havre de Grace to Rocky Mount (North Carolina) | 263.96 mi (424.80 km) |
| Havre de Grace to Rocky Point (New York) | 193.09 mi (310.74 km) |
| Havre de Grace to Rocky River (Ohio) | 329.29 mi (529.95 km) |
| Havre de Grace to Roessleville (New York) | 248.76 mi (400.34 km) |
| Havre de Grace to Rogers (Arkansas) | 1,006.20 mi (1,619.32 km) |
| Havre de Grace to Rogers (Minnesota) | 970.31 mi (1,561.57 km) |
| Havre de Grace to Rohnert Park (California) | 2,476.07 mi (3,984.84 km) |
| Havre de Grace to Rolla (Missouri) | 849.26 mi (1,366.75 km) |
| Havre de Grace to Rolling Meadows (Illinois) | 646.24 mi (1,040.02 km) |
| Havre de Grace to Roma (Texas) | 1,599.66 mi (2,574.40 km) |
| Havre de Grace to Rome (Georgia) | 619.44 mi (996.89 km) |
| Havre de Grace to Rome (New York) | 256.17 mi (412.27 km) |
