| Duluth to Rosemont (California) | 1,578.33 mi (2,540.08 km) |
| Duluth to Rosemount (Minnesota) | 147.13 mi (236.79 km) |
| Duluth to Rosenberg (Texas) | 1,206.81 mi (1,942.18 km) |
| Duluth to Roseville (California) | 1,568.91 mi (2,524.91 km) |
| Duluth to Roseville (Michigan) | 539.49 mi (868.22 km) |
| Duluth to Roseville (Minnesota) | 131.04 mi (210.89 km) |
| Duluth to Rossmoor (California) | 1,623.56 mi (2,612.86 km) |
| Duluth to Rossville (Maryland) | 939.57 mi (1,512.09 km) |
| Duluth to Roswell (Georgia) | 969.53 mi (1,560.31 km) |
| Duluth to Roswell (New Mexico) | 1,131.29 mi (1,820.64 km) |
| Duluth to Round Lake (Illinois) | 364.86 mi (587.18 km) |
| Duluth to Round Lake Beach (Illinois) | 363.43 mi (584.88 km) |
| Duluth to Round Rock (Texas) | 1,160.81 mi (1,868.15 km) |
| Duluth to Rowland Heights (California) | 1,607.07 mi (2,586.33 km) |
| Duluth to Rowlett (Texas) | 985.37 mi (1,585.80 km) |
