| South Portland to Pyrzyce | 3,727.18 mi (5,998.31 km) |
| South Portland to Pyskowice | 3,958.55 mi (6,370.68 km) |
| South Portland to Raciborz | 3,954.55 mi (6,364.23 km) |
| South Portland to Radom | 4,016.88 mi (6,464.55 km) |
| South Portland to Radomsko | 3,965.76 mi (6,382.27 km) |
| South Portland to Radzionkow Nowy | 3,968.65 mi (6,386.92 km) |
| South Portland to Radzymin | 3,981.47 mi (6,407.56 km) |
| South Portland to Radzyn Podlaski | 4,056.51 mi (6,528.32 km) |
| South Portland to Rawa Mazowiecka | 3,970.74 mi (6,390.29 km) |
| South Portland to Rawicz | 3,850.06 mi (6,196.08 km) |
| South Portland to Reda | 3,805.26 mi (6,123.97 km) |
| South Portland to Rogozno | 3,817.56 mi (6,143.76 km) |
| South Portland to Ropczyce | 4,083.57 mi (6,571.88 km) |
| South Portland to Ruda Slaska | 3,971.79 mi (6,391.98 km) |
| South Portland to Rumia | 3,808.65 mi (6,129.43 km) |
