| Prospect Heights to Sesimbra | 4,009.53 mi (6,452.72 km) |
| Prospect Heights to Setubal | 4,016.27 mi (6,463.57 km) |
| Prospect Heights to Sever do Vouga | 3,963.06 mi (6,377.93 km) |
| Prospect Heights to Silves | 4,085.51 mi (6,575.00 km) |
| Prospect Heights to Sines | 4,037.91 mi (6,498.39 km) |
| Prospect Heights to Sintra | 3,983.58 mi (6,410.95 km) |
| Prospect Heights to Sobrado de Paiva | 3,957.26 mi (6,368.60 km) |
| Prospect Heights to Sobral de Monte Agraco | 3,986.82 mi (6,416.17 km) |
| Prospect Heights to Soure | 3,974.58 mi (6,396.47 km) |
| Prospect Heights to Tabua | 3,991.32 mi (6,423.41 km) |
| Prospect Heights to Tavira | 4,124.94 mi (6,638.45 km) |
| Prospect Heights to Tomar | 4,000.22 mi (6,437.74 km) |
| Prospect Heights to Tondela | 3,983.42 mi (6,410.70 km) |
| Prospect Heights to Torre de Moncorvo | 4,002.59 mi (6,441.55 km) |
| Prospect Heights to Torres Novas | 3,999.56 mi (6,436.66 km) |
