| South Portland to Sereflikochisar | 5,015.77 mi (8,072.10 km) |
| South Portland to Serik | 5,011.45 mi (8,065.14 km) |
| South Portland to Serinhisar | 4,905.64 mi (7,894.86 km) |
| South Portland to Serinyol | 5,243.78 mi (8,439.05 km) |
| South Portland to Seydisehir | 5,018.93 mi (8,077.18 km) |
| South Portland to Seyhan | 5,179.63 mi (8,335.81 km) |
| South Portland to Seyitgazi | 4,879.07 mi (7,852.10 km) |
| South Portland to Siirt | 5,388.72 mi (8,672.31 km) |
| South Portland to Sile | 4,757.96 mi (7,657.20 km) |
| South Portland to Silifke | 5,152.27 mi (8,291.78 km) |
| South Portland to Silivri | 4,707.96 mi (7,576.73 km) |
| South Portland to Silopi | 5,442.47 mi (8,758.81 km) |
| South Portland to Simav | 4,826.14 mi (7,766.92 km) |
| South Portland to Sinanpasa | 4,892.74 mi (7,874.11 km) |
| South Portland to Sindirgi | 4,786.09 mi (7,702.47 km) |
