| Portimao to Serik | 2,170.26 mi (3,492.70 km) |
| Portimao to Serinhisar | 2,062.36 mi (3,319.05 km) |
| Portimao to Serinyol | 2,453.87 mi (3,949.12 km) |
| Portimao to Seydisehir | 2,203.22 mi (3,545.74 km) |
| Portimao to Seyhan | 2,396.71 mi (3,857.13 km) |
| Portimao to Seyitgazi | 2,116.75 mi (3,406.57 km) |
| Portimao to Siirt | 2,731.88 mi (4,396.54 km) |
| Portimao to Sile | 2,046.42 mi (3,293.39 km) |
| Portimao to Silifke | 2,331.65 mi (3,752.42 km) |
| Portimao to Silivri | 1,976.16 mi (3,180.33 km) |
| Portimao to Silopi | 2,772.01 mi (4,461.13 km) |
| Portimao to Simav | 2,029.79 mi (3,266.63 km) |
| Portimao to Sinanpasa | 2,100.60 mi (3,380.58 km) |
| Portimao to Sindirgi | 1,985.41 mi (3,195.21 km) |
| Portimao to Sinop | 2,325.39 mi (3,742.35 km) |
