| Olton to Sesimbra | 1,028.24 mi (1,654.79 km) |
| Olton to Setubal | 1,019.58 mi (1,640.86 km) |
| Olton to Sever do Vouga | 865.75 mi (1,393.29 km) |
| Olton to Silves | 1,101.59 mi (1,772.84 km) |
| Olton to Sines | 1,056.81 mi (1,700.77 km) |
| Olton to Sintra | 1,009.72 mi (1,624.98 km) |
| Olton to Sobrado de Paiva | 844.45 mi (1,359.00 km) |
| Olton to Sobral de Monte Agraco | 991.35 mi (1,595.43 km) |
| Olton to Soure | 914.97 mi (1,472.50 km) |
| Olton to Tabua | 884.77 mi (1,423.90 km) |
| Olton to Tavira | 1,095.80 mi (1,763.51 km) |
| Olton to Tomar | 941.03 mi (1,514.44 km) |
| Olton to Tondela | 875.32 mi (1,408.69 km) |
| Olton to Torre de Moncorvo | 815.72 mi (1,312.78 km) |
| Olton to Torres Novas | 951.68 mi (1,531.57 km) |
