| South Portland to Quarteira | 3,228.97 mi (5,196.52 km) |
| South Portland to Queluz | 3,118.92 mi (5,019.42 km) |
| South Portland to Reguengos de Monsaraz | 3,212.78 mi (5,170.48 km) |
| South Portland to Resende | 3,110.07 mi (5,005.18 km) |
| South Portland to Ribeira Brava | 2,936.97 mi (4,726.60 km) |
| South Portland to Ribeira Grande | 2,349.55 mi (3,781.24 km) |
| South Portland to Rio de Mouro | 3,115.19 mi (5,013.41 km) |
| South Portland to Rio Maior | 3,116.98 mi (5,016.29 km) |
| South Portland to Rio Tinto | 3,079.84 mi (4,956.53 km) |
| South Portland to Sabugal | 3,174.17 mi (5,108.34 km) |
| South Portland to Sacavem | 3,125.34 mi (5,029.74 km) |
| South Portland to Salvaterra de Magos | 3,133.92 mi (5,043.55 km) |
| South Portland to Santa Comba Dao | 3,123.69 mi (5,027.09 km) |
| South Portland to Santa Cruz | 2,949.45 mi (4,746.68 km) |
| South Portland to Santa Iria da Azoia | 3,124.55 mi (5,028.48 km) |
