| Onex to Sesimbra | 940.34 mi (1,513.33 km) |
| Onex to Setubal | 928.16 mi (1,493.73 km) |
| Onex to Sever do Vouga | 815.74 mi (1,312.80 km) |
| Onex to Silves | 971.56 mi (1,563.57 km) |
| Onex to Sines | 952.55 mi (1,532.98 km) |
| Onex to Sintra | 937.13 mi (1,508.16 km) |
| Onex to Sobrado de Paiva | 800.39 mi (1,288.10 km) |
| Onex to Sobral de Monte Agraco | 917.82 mi (1,477.09 km) |
| Onex to Soure | 853.47 mi (1,373.53 km) |
| Onex to Tabua | 815.06 mi (1,311.71 km) |
| Onex to Tavira | 944.32 mi (1,519.73 km) |
| Onex to Tomar | 862.22 mi (1,387.61 km) |
| Onex to Tondela | 811.39 mi (1,305.81 km) |
| Onex to Torre de Moncorvo | 744.10 mi (1,197.51 km) |
| Onex to Torres Novas | 872.71 mi (1,404.49 km) |
