| Boone to Sesimbra | 3,881.49 mi (6,246.65 km) |
| Boone to Setubal | 3,889.76 mi (6,259.97 km) |
| Boone to Sever do Vouga | 3,859.71 mi (6,211.61 km) |
| Boone to Silves | 3,948.16 mi (6,353.95 km) |
| Boone to Sines | 3,906.12 mi (6,286.29 km) |
| Boone to Sintra | 3,857.86 mi (6,208.62 km) |
| Boone to Sobrado de Paiva | 3,857.20 mi (6,207.56 km) |
| Boone to Sobral de Monte Agraco | 3,864.07 mi (6,218.61 km) |
| Boone to Soure | 3,863.65 mi (6,217.95 km) |
| Boone to Tabua | 3,885.55 mi (6,253.18 km) |
| Boone to Tavira | 3,989.98 mi (6,421.25 km) |
| Boone to Tomar | 3,885.73 mi (6,253.48 km) |
| Boone to Tondela | 3,878.97 mi (6,242.60 km) |
| Boone to Torre de Moncorvo | 3,908.12 mi (6,289.51 km) |
| Boone to Torres Novas | 3,883.36 mi (6,249.67 km) |
