| South Portland to Redondela | 3,045.86 mi (4,901.84 km) |
| South Portland to Reinosa | 3,233.16 mi (5,203.26 km) |
| South Portland to Requena | 3,483.19 mi (5,605.66 km) |
| South Portland to Reus | 3,530.81 mi (5,682.29 km) |
| South Portland to Rianxo | 3,026.42 mi (4,870.56 km) |
| South Portland to Ribadeo | 3,084.79 mi (4,964.48 km) |
| South Portland to Rincon de la Victoria | 3,425.26 mi (5,512.42 km) |
| South Portland to Ripoll | 3,546.13 mi (5,706.95 km) |
| South Portland to Ripollet | 3,567.55 mi (5,741.42 km) |
| South Portland to Rojales | 3,548.03 mi (5,710.01 km) |
| South Portland to Ronda | 3,382.11 mi (5,442.98 km) |
| South Portland to Roquetas de Mar | 3,503.71 mi (5,638.68 km) |
| South Portland to Rosas | 3,588.58 mi (5,775.26 km) |
| South Portland to Rubi | 3,561.98 mi (5,732.45 km) |
| South Portland to Rute | 3,400.86 mi (5,473.16 km) |
