| Duluth to Romeoville (Illinois) | 407.72 mi (656.16 km) |
| Duluth to Romulus (Michigan) | 534.12 mi (859.58 km) |
| Duluth to Ronkonkoma (New York) | 1,030.87 mi (1,659.03 km) |
| Duluth to Roosevelt (New York) | 1,014.45 mi (1,632.60 km) |
| Duluth to Rosamond (California) | 1,581.32 mi (2,544.88 km) |
| Duluth to Rosaryville (Maryland) | 950.89 mi (1,530.31 km) |
| Duluth to Roscoe (Illinois) | 337.65 mi (543.40 km) |
| Duluth to Rose Hill (Virginia) | 938.47 mi (1,510.33 km) |
| Duluth to Roseburg (Oregon) | 1,534.19 mi (2,469.03 km) |
| Duluth to Rosedale (California) | 1,602.64 mi (2,579.20 km) |
| Duluth to Rosedale (Maryland) | 939.54 mi (1,512.05 km) |
| Duluth to Roselle (Illinois) | 386.93 mi (622.70 km) |
| Duluth to Roselle (New Jersey) | 985.04 mi (1,585.27 km) |
| Duluth to Roselle Park (New Jersey) | 984.29 mi (1,584.06 km) |
| Duluth to Rosemead (California) | 1,610.93 mi (2,592.54 km) |
