| Slough to Quarteira | 1,063.28 mi (1,711.18 km) |
| Slough to Queluz | 976.06 mi (1,570.82 km) |
| Slough to Reguengos de Monsaraz | 965.10 mi (1,553.18 km) |
| Slough to Resende | 799.35 mi (1,286.43 km) |
| Slough to Ribeira Brava | 1,542.61 mi (2,482.59 km) |
| Slough to Ribeira Grande | 1,534.87 mi (2,470.13 km) |
| Slough to Rio de Mouro | 976.33 mi (1,571.25 km) |
| Slough to Rio Maior | 932.07 mi (1,500.03 km) |
| Slough to Rio Tinto | 807.61 mi (1,299.72 km) |
| Slough to Sabugal | 830.95 mi (1,337.29 km) |
| Slough to Sacavem | 970.00 mi (1,561.06 km) |
| Slough to Salvaterra de Magos | 949.25 mi (1,527.67 km) |
| Slough to Santa Comba Dao | 847.37 mi (1,363.72 km) |
| Slough to Santa Cruz | 1,535.90 mi (2,471.78 km) |
| Slough to Santa Iria da Azoia | 966.33 mi (1,555.15 km) |
