| Port Huron to Rothenbach an der Pegnitz | 4,201.38 mi (6,761.47 km) |
| Port Huron to Rothenburg ob der Tauber | 4,165.08 mi (6,703.05 km) |
| Port Huron to Rottweil | 4,150.47 mi (6,679.54 km) |
| Port Huron to Rudersberg | 4,158.69 mi (6,692.76 km) |
| Port Huron to Rudesheim am Rhein | 4,057.69 mi (6,530.23 km) |
| Port Huron to Rudolstadt | 4,158.01 mi (6,691.67 km) |
| Port Huron to Runkel | 4,051.13 mi (6,519.67 km) |
| Port Huron to Ruppichteroth | 4,010.46 mi (6,454.21 km) |
| Port Huron to Russelsheim | 4,075.55 mi (6,558.96 km) |
| Port Huron to Rutesheim | 4,139.13 mi (6,661.28 km) |
| Port Huron to Ruthen | 4,024.85 mi (6,477.37 km) |
| Port Huron to Saalfeld | 4,161.95 mi (6,698.02 km) |
| Port Huron to Saarbrucken | 4,048.75 mi (6,515.84 km) |
| Port Huron to Saarlouis | 4,036.13 mi (6,495.52 km) |
| Port Huron to Saarwellingen | 4,036.92 mi (6,496.80 km) |
