| Duluth to Ratingen | 4,137.48 mi (6,658.63 km) |
| Duluth to Ratzeburg | 4,160.12 mi (6,695.07 km) |
| Duluth to Raubling | 4,474.15 mi (7,200.44 km) |
| Duluth to Rauenberg | 4,289.93 mi (6,903.97 km) |
| Duluth to Raunheim | 4,247.86 mi (6,836.26 km) |
| Duluth to Ravensburg | 4,388.54 mi (7,062.68 km) |
| Duluth to Recke | 4,120.41 mi (6,631.16 km) |
| Duluth to Recklinghausen | 4,135.70 mi (6,655.77 km) |
| Duluth to Regen | 4,453.37 mi (7,167.00 km) |
| Duluth to Regensburg | 4,416.00 mi (7,106.87 km) |
| Duluth to Regenstauf | 4,412.53 mi (7,101.29 km) |
| Duluth to Rehau | 4,356.67 mi (7,011.38 km) |
| Duluth to Rehburg-Loccum | 4,165.70 mi (6,704.04 km) |
| Duluth to Rehlingen-Siersburg | 4,215.47 mi (6,784.14 km) |
| Duluth to Reichelsheim | 4,274.56 mi (6,879.25 km) |
