| Sinnai to Castelo Branco | 889.16 mi (1,430.97 km) |
| Sinnai to Castro Daire | 910.87 mi (1,465.90 km) |
| Sinnai to Celorico de Basto | 915.71 mi (1,473.69 km) |
| Sinnai to Chamusca | 943.78 mi (1,518.86 km) |
| Sinnai to Chaves | 890.34 mi (1,432.86 km) |
| Sinnai to Cinfaes | 921.71 mi (1,483.34 km) |
| Sinnai to Coimbra | 937.12 mi (1,508.15 km) |
| Sinnai to Condeixa-a-Nova | 941.09 mi (1,514.54 km) |
| Sinnai to Corroios | 985.55 mi (1,586.09 km) |
| Sinnai to Coruche | 949.05 mi (1,527.35 km) |
| Sinnai to Costa de Caparica | 989.77 mi (1,592.89 km) |
| Sinnai to Covilha | 888.01 mi (1,429.11 km) |
| Sinnai to Eiras | 936.78 mi (1,507.60 km) |
| Sinnai to Elvas | 876.36 mi (1,410.37 km) |
| Sinnai to Entroncamento | 942.25 mi (1,516.40 km) |
