| Sinnai to Bombarral | 980.09 mi (1,577.30 km) |
| Sinnai to Bougado | 944.49 mi (1,520.01 km) |
| Sinnai to Braga | 938.12 mi (1,509.77 km) |
| Sinnai to Braganca | 854.28 mi (1,374.84 km) |
| Sinnai to Cabeceiras de Basto | 917.24 mi (1,476.15 km) |
| Sinnai to Cacem | 992.40 mi (1,597.12 km) |
| Sinnai to Cadaval | 977.40 mi (1,572.97 km) |
| Sinnai to Caldas da Rainha | 978.09 mi (1,574.09 km) |
| Sinnai to Calheta | 1,535.80 mi (2,471.63 km) |
| Sinnai to Camara de Lobos | 1,526.77 mi (2,457.10 km) |
| Sinnai to Canico | 1,521.61 mi (2,448.80 km) |
| Sinnai to Cantanhede | 945.55 mi (1,521.71 km) |
| Sinnai to Carregal do Sal | 914.18 mi (1,471.23 km) |
| Sinnai to Cartaxo | 961.16 mi (1,546.84 km) |
| Sinnai to Cascais | 998.88 mi (1,607.55 km) |
