| Sinnai to Santiago do Cacem | 968.41 mi (1,558.50 km) |
| Sinnai to Santo Andre | 970.65 mi (1,562.11 km) |
| Sinnai to Santo Tirso | 939.69 mi (1,512.29 km) |
| Sinnai to Sao Bras de Alportel | 937.80 mi (1,509.25 km) |
| Sinnai to Sao Felix da Marinha | 947.07 mi (1,524.15 km) |
| Sinnai to Sao Joao da Madeira | 939.88 mi (1,512.59 km) |
| Sinnai to Sao Joao de Ver | 943.19 mi (1,517.92 km) |
| Sinnai to Sao Mamede de Infesta | 946.22 mi (1,522.79 km) |
| Sinnai to Sao Pedro do Sul | 917.67 mi (1,476.84 km) |
| Sinnai to Satao | 900.20 mi (1,448.73 km) |
| Sinnai to Seia | 898.53 mi (1,446.05 km) |
| Sinnai to Senhora da Hora | 948.84 mi (1,527.00 km) |
| Sinnai to Serpa | 910.49 mi (1,465.28 km) |
| Sinnai to Serta | 921.02 mi (1,482.24 km) |
| Sinnai to Sesimbra | 984.64 mi (1,584.62 km) |
