| Port Huron to Rodgau | 4,092.61 mi (6,586.41 km) |
| Port Huron to Roding | 4,259.84 mi (6,855.55 km) |
| Port Huron to Rodinghausen | 3,998.11 mi (6,434.34 km) |
| Port Huron to Roetgen | 3,968.53 mi (6,386.73 km) |
| Port Huron to Rommerskirchen | 3,973.90 mi (6,395.38 km) |
| Port Huron to Ronnenberg | 4,038.56 mi (6,499.43 km) |
| Port Huron to Rosbach vor der Hohe | 4,075.52 mi (6,558.92 km) |
| Port Huron to Rosdorf | 4,076.80 mi (6,560.98 km) |
| Port Huron to Rosenheim | 4,297.89 mi (6,916.78 km) |
| Port Huron to Rosrath | 3,997.09 mi (6,432.70 km) |
| Port Huron to Rossdorf | 4,093.52 mi (6,587.88 km) |
| Port Huron to Rosstal | 4,190.89 mi (6,744.58 km) |
| Port Huron to Rostock | 4,063.10 mi (6,538.93 km) |
| Port Huron to Rotenburg an der Fulda | 4,088.68 mi (6,580.10 km) |
| Port Huron to Roth | 4,204.54 mi (6,766.55 km) |
