| South Portland to Radauti | 4,330.73 mi (6,969.63 km) |
| South Portland to Ramnicu Sarat | 4,475.83 mi (7,203.16 km) |
| South Portland to Ramnicu Valcea | 4,382.76 mi (7,053.36 km) |
| South Portland to Rasnov | 4,405.10 mi (7,089.33 km) |
| South Portland to Reghin | 4,327.86 mi (6,965.01 km) |
| South Portland to Resita | 4,276.43 mi (6,882.24 km) |
| South Portland to Roman | 4,406.19 mi (7,091.08 km) |
| South Portland to Rosiori de Vede | 4,448.10 mi (7,158.52 km) |
| South Portland to Rovinari | 4,342.59 mi (6,988.72 km) |
| South Portland to Roznov | 4,394.26 mi (7,071.88 km) |
| South Portland to Sabaoani | 4,399.58 mi (7,080.44 km) |
| South Portland to Sacele | 4,413.68 mi (7,103.12 km) |
| South Portland to Sacueni | 4,204.06 mi (6,765.78 km) |
| South Portland to Salcea | 4,355.49 mi (7,009.48 km) |
| South Portland to Salonta | 4,208.27 mi (6,772.56 km) |
