| Siran to Quarteira | 2,528.31 mi (4,068.92 km) |
| Siran to Queluz | 2,550.62 mi (4,104.83 km) |
| Siran to Reguengos de Monsaraz | 2,468.72 mi (3,973.01 km) |
| Siran to Resende | 2,438.83 mi (3,924.92 km) |
| Siran to Ribeira Brava | 3,113.36 mi (5,010.47 km) |
| Siran to Ribeira Grande | 3,395.80 mi (5,465.02 km) |
| Siran to Rio de Mouro | 2,553.64 mi (4,109.69 km) |
| Siran to Rio Maior | 2,521.43 mi (4,057.85 km) |
| Siran to Rio Tinto | 2,467.60 mi (3,971.22 km) |
| Siran to Sabugal | 2,407.60 mi (3,874.66 km) |
| Siran to Sacavem | 2,541.45 mi (4,090.07 km) |
| Siran to Salvaterra de Magos | 2,520.28 mi (4,056.00 km) |
| Siran to Santa Comba Dao | 2,459.15 mi (3,957.62 km) |
| Siran to Santa Cruz | 3,100.33 mi (4,989.49 km) |
| Siran to Santa Iria da Azoia | 2,539.46 mi (4,086.87 km) |
