| South Portland to Rothenbach an der Pegnitz | 3,701.67 mi (5,957.26 km) |
| South Portland to Rothenburg ob der Tauber | 3,662.20 mi (5,893.74 km) |
| South Portland to Rottweil | 3,636.43 mi (5,852.26 km) |
| South Portland to Rudersberg | 3,651.14 mi (5,875.95 km) |
| South Portland to Rudesheim am Rhein | 3,553.50 mi (5,718.80 km) |
| South Portland to Rudolstadt | 3,666.48 mi (5,900.64 km) |
| South Portland to Runkel | 3,550.21 mi (5,713.52 km) |
| South Portland to Ruppichteroth | 3,511.01 mi (5,650.42 km) |
| South Portland to Russelsheim | 3,572.51 mi (5,749.40 km) |
| South Portland to Rutesheim | 3,629.76 mi (5,841.53 km) |
| South Portland to Ruthen | 3,532.02 mi (5,684.23 km) |
| South Portland to Saalfeld | 3,670.08 mi (5,906.42 km) |
| South Portland to Saarbrucken | 3,537.66 mi (5,693.32 km) |
| South Portland to Saarlouis | 3,525.02 mi (5,672.96 km) |
| South Portland to Saarwellingen | 3,526.17 mi (5,674.83 km) |
