| Siano to Queluz | 1,276.20 mi (2,053.84 km) |
| Siano to Reguengos de Monsaraz | 1,191.34 mi (1,917.27 km) |
| Siano to Resende | 1,179.20 mi (1,897.73 km) |
| Siano to Ribeira Brava | 1,833.35 mi (2,950.49 km) |
| Siano to Ribeira Grande | 2,140.71 mi (3,445.14 km) |
| Siano to Rio de Mouro | 1,279.37 mi (2,058.95 km) |
| Siano to Rio Maior | 1,249.66 mi (2,011.13 km) |
| Siano to Rio Tinto | 1,209.45 mi (1,946.42 km) |
| Siano to Sabugal | 1,140.36 mi (1,835.24 km) |
| Siano to Sacavem | 1,267.06 mi (2,039.13 km) |
| Siano to Salvaterra de Magos | 1,246.63 mi (2,006.26 km) |
| Siano to Santa Comba Dao | 1,193.60 mi (1,920.92 km) |
| Siano to Santa Cruz | 1,820.39 mi (2,929.64 km) |
| Siano to Santa Iria da Azoia | 1,265.30 mi (2,036.31 km) |
| Siano to Santarem | 1,238.22 mi (1,992.72 km) |
