| Southborough to Sucha Beskidzka | 853.27 mi (1,373.21 km) |
| Southborough to Suchanino | 795.47 mi (1,280.18 km) |
| Southborough to Sulechow | 660.37 mi (1,062.76 km) |
| Southborough to Sulecin | 639.32 mi (1,028.89 km) |
| Southborough to Sulejowek | 899.80 mi (1,448.08 km) |
| Southborough to Suwalki | 967.43 mi (1,556.92 km) |
| Southborough to Swarzedz | 721.84 mi (1,161.69 km) |
| Southborough to Swidnica | 704.01 mi (1,133.00 km) |
| Southborough to Swidnik | 967.76 mi (1,557.47 km) |
| Southborough to Swidwin | 675.61 mi (1,087.28 km) |
| Southborough to Swiebodzice | 697.37 mi (1,122.32 km) |
| Southborough to Swiecie | 781.25 mi (1,257.30 km) |
| Southborough to Swiedbodzin | 656.83 mi (1,057.07 km) |
| Southborough to Swietochlowice | 815.83 mi (1,312.95 km) |
| Southborough to Swinoujscie | 616.60 mi (992.32 km) |
