| Greenock to Sesimbra | 1,225.97 mi (1,973.01 km) |
| Greenock to Setubal | 1,218.93 mi (1,961.68 km) |
| Greenock to Sever do Vouga | 1,063.94 mi (1,712.24 km) |
| Greenock to Silves | 1,307.64 mi (2,104.44 km) |
| Greenock to Sines | 1,257.75 mi (2,024.15 km) |
| Greenock to Sintra | 1,203.92 mi (1,937.52 km) |
| Greenock to Sobrado de Paiva | 1,042.70 mi (1,678.07 km) |
| Greenock to Sobral de Monte Agraco | 1,187.09 mi (1,910.44 km) |
| Greenock to Soure | 1,112.61 mi (1,790.57 km) |
| Greenock to Tabua | 1,087.29 mi (1,749.83 km) |
| Greenock to Tavira | 1,308.18 mi (2,105.31 km) |
| Greenock to Tomar | 1,141.93 mi (1,837.76 km) |
| Greenock to Tondela | 1,076.90 mi (1,733.11 km) |
| Greenock to Torre de Moncorvo | 1,024.71 mi (1,649.11 km) |
| Greenock to Torres Novas | 1,151.85 mi (1,853.73 km) |
