| Key Largo to Sesimbra | 4,185.82 mi (6,736.43 km) |
| Key Largo to Setubal | 4,195.87 mi (6,752.60 km) |
| Key Largo to Sever do Vouga | 4,197.83 mi (6,755.76 km) |
| Key Largo to Silves | 4,237.22 mi (6,819.14 km) |
| Key Largo to Sines | 4,204.41 mi (6,766.34 km) |
| Key Largo to Sintra | 4,166.25 mi (6,704.94 km) |
| Key Largo to Sobrado de Paiva | 4,199.69 mi (6,758.75 km) |
| Key Largo to Sobral de Monte Agraco | 4,176.23 mi (6,720.99 km) |
| Key Largo to Soure | 4,191.63 mi (6,745.78 km) |
| Key Largo to Tabua | 4,219.52 mi (6,790.67 km) |
| Key Largo to Tavira | 4,280.77 mi (6,889.23 km) |
| Key Largo to Tomar | 4,208.16 mi (6,772.37 km) |
| Key Largo to Tondela | 4,214.93 mi (6,783.27 km) |
| Key Largo to Torre de Moncorvo | 4,256.02 mi (6,849.40 km) |
| Key Largo to Torres Novas | 4,203.60 mi (6,765.04 km) |
