| South Portland to Solymar | 4,071.47 mi (6,552.40 km) |
| South Portland to Sopron | 3,975.14 mi (6,397.37 km) |
| South Portland to Szarvas | 4,162.51 mi (6,698.91 km) |
| South Portland to Szazhalombatta | 4,081.62 mi (6,568.74 km) |
| South Portland to Szeged | 4,169.85 mi (6,710.72 km) |
| South Portland to Szeghalom | 4,180.56 mi (6,727.96 km) |
| South Portland to Szekesfehervar | 4,065.51 mi (6,542.80 km) |
| South Portland to Szekszard | 4,108.48 mi (6,611.96 km) |
| South Portland to Szentendre | 4,072.77 mi (6,554.49 km) |
| South Portland to Szentes | 4,159.21 mi (6,693.60 km) |
| South Portland to Szentgotthard | 3,989.29 mi (6,420.15 km) |
| South Portland to Szigethalom | 4,084.79 mi (6,573.83 km) |
| South Portland to Szigetszentmiklos | 4,085.27 mi (6,574.60 km) |
| South Portland to Szigetvar | 4,083.59 mi (6,571.90 km) |
| South Portland to Szolnok | 4,136.90 mi (6,657.70 km) |
