| South Portland to Sosnowiec | 3,981.66 mi (6,407.86 km) |
| South Portland to Srem | 3,839.94 mi (6,179.79 km) |
| South Portland to Sroda Slaska | 3,855.12 mi (6,204.22 km) |
| South Portland to Sroda Wielkopolska | 3,845.10 mi (6,188.09 km) |
| South Portland to Stalowa Wola | 4,080.50 mi (6,566.93 km) |
| South Portland to Starachowice | 4,026.38 mi (6,479.84 km) |
| South Portland to Stargard Szczecinski | 3,727.09 mi (5,998.17 km) |
| South Portland to Starogard Gdanski | 3,833.06 mi (6,168.72 km) |
| South Portland to Stary Sacz | 4,064.70 mi (6,541.51 km) |
| South Portland to Staszow | 4,047.82 mi (6,514.34 km) |
| South Portland to Strzegom | 3,852.40 mi (6,199.83 km) |
| South Portland to Strzelce Krajenskie | 3,759.30 mi (6,050.00 km) |
| South Portland to Strzelce Opolskie | 3,941.82 mi (6,343.75 km) |
| South Portland to Strzelin | 3,885.87 mi (6,253.70 km) |
| South Portland to Strzyzow | 4,096.02 mi (6,591.91 km) |
