| Ianca to Sesimbra | 1,922.41 mi (3,093.83 km) |
| Ianca to Setubal | 1,909.91 mi (3,073.70 km) |
| Ianca to Sever do Vouga | 1,823.02 mi (2,933.87 km) |
| Ianca to Silves | 1,929.45 mi (3,105.15 km) |
| Ianca to Sines | 1,925.86 mi (3,099.38 km) |
| Ianca to Sintra | 1,925.93 mi (3,099.48 km) |
| Ianca to Sobrado de Paiva | 1,810.61 mi (2,913.89 km) |
| Ianca to Sobral de Monte Agraco | 1,908.03 mi (3,070.67 km) |
| Ianca to Soure | 1,853.91 mi (2,983.58 km) |
| Ianca to Tabua | 1,816.24 mi (2,922.95 km) |
| Ianca to Tavira | 1,893.38 mi (3,047.10 km) |
| Ianca to Tomar | 1,855.67 mi (2,986.41 km) |
| Ianca to Tondela | 1,814.79 mi (2,920.63 km) |
| Ianca to Torre de Moncorvo | 1,751.38 mi (2,818.57 km) |
| Ianca to Torres Novas | 1,865.08 mi (3,001.55 km) |
