| Seia to Quarteira | 232.67 mi (374.45 km) |
| Seia to Queluz | 142.33 mi (229.05 km) |
| Seia to Reguengos de Monsaraz | 138.85 mi (223.45 km) |
| Seia to Resende | 49.20 mi (79.18 km) |
| Seia to Ribeira Brava | 744.16 mi (1,197.61 km) |
| Seia to Ribeira Grande | 970.00 mi (1,561.06 km) |
| Seia to Rio de Mouro | 143.45 mi (230.86 km) |
| Seia to Rio Maior | 99.59 mi (160.27 km) |
| Seia to Rio Tinto | 68.85 mi (110.80 km) |
| Seia to Sabugal | 32.96 mi (53.04 km) |
| Seia to Sacavem | 134.99 mi (217.24 km) |
| Seia to Salvaterra de Magos | 112.81 mi (181.56 km) |
| Seia to Santa Comba Dao | 21.85 mi (35.16 km) |
| Seia to Santa Cruz | 734.61 mi (1,182.24 km) |
| Seia to Santa Iria da Azoia | 131.48 mi (211.60 km) |
