| South Portland to Rodgau | 3,590.78 mi (5,778.80 km) |
| South Portland to Roding | 3,761.42 mi (6,053.41 km) |
| South Portland to Rodinghausen | 3,510.60 mi (5,649.77 km) |
| South Portland to Roetgen | 3,464.96 mi (5,576.31 km) |
| South Portland to Rommerskirchen | 3,474.00 mi (5,590.86 km) |
| South Portland to Ronnenberg | 3,554.13 mi (5,719.81 km) |
| South Portland to Rosbach vor der Hohe | 3,575.13 mi (5,753.61 km) |
| South Portland to Rosdorf | 3,587.22 mi (5,773.07 km) |
| South Portland to Rosenheim | 3,790.27 mi (6,099.84 km) |
| South Portland to Rosrath | 3,497.34 mi (5,628.42 km) |
| South Portland to Rossdorf | 3,590.37 mi (5,778.14 km) |
| South Portland to Rosstal | 3,689.77 mi (5,938.11 km) |
| South Portland to Rostock | 3,597.14 mi (5,789.04 km) |
| South Portland to Rotenburg an der Fulda | 3,595.28 mi (5,786.04 km) |
| South Portland to Roth | 3,702.94 mi (5,959.31 km) |
