| Duluth to River Ridge (Louisiana) | 1,166.44 mi (1,877.20 km) |
| Duluth to Riverbank (California) | 1,588.88 mi (2,557.05 km) |
| Duluth to Riverdale (Georgia) | 998.68 mi (1,607.22 km) |
| Duluth to Riverdale (Illinois) | 418.68 mi (673.81 km) |
| Duluth to Riverside (California) | 1,587.24 mi (2,554.41 km) |
| Duluth to Riverside (Ohio) | 628.62 mi (1,011.67 km) |
| Duluth to Riverton (Utah) | 1,077.50 mi (1,734.07 km) |
| Duluth to Riverton (Wyoming) | 835.33 mi (1,344.34 km) |
| Duluth to Riverview (Florida) | 1,414.05 mi (2,275.69 km) |
| Duluth to Riverview (Michigan) | 543.18 mi (874.16 km) |
| Duluth to Riviera Beach (Florida) | 1,530.19 mi (2,462.61 km) |
| Duluth to Riviera Beach (Maryland) | 945.90 mi (1,522.28 km) |
| Duluth to Roanoke (Virginia) | 904.27 mi (1,455.28 km) |
| Duluth to Roanoke Rapids (North Carolina) | 1,031.19 mi (1,659.55 km) |
| Duluth to Robbinsdale (Minnesota) | 133.81 mi (215.35 km) |
