| South Portland to Sentrupert | 3,975.77 mi (6,398.38 km) |
| South Portland to Sevnica | 3,983.40 mi (6,410.67 km) |
| South Portland to Sezana | 3,935.21 mi (6,333.11 km) |
| South Portland to Skocjan | 3,986.56 mi (6,415.75 km) |
| South Portland to Skofja Loka | 3,936.67 mi (6,335.46 km) |
| South Portland to Skofljica | 3,954.41 mi (6,364.01 km) |
| South Portland to Slovenj Gradec | 3,956.34 mi (6,367.11 km) |
| South Portland to Slovenska Bistrica | 3,980.80 mi (6,406.47 km) |
| South Portland to Slovenske Konjice | 3,976.47 mi (6,399.52 km) |
| South Portland to Smarje | 3,984.30 mi (6,412.11 km) |
| South Portland to Smarjeske Toplice | 3,985.29 mi (6,413.71 km) |
| South Portland to Smartno | 3,963.38 mi (6,378.44 km) |
| South Portland to Smartno | 3,960.82 mi (6,374.32 km) |
| South Portland to Sodrazica | 3,964.81 mi (6,380.74 km) |
| South Portland to Solcava | 3,943.68 mi (6,346.74 km) |
