| South Portland to Roznava | 4,094.19 mi (6,588.96 km) |
| South Portland to Ruzomberok | 4,031.70 mi (6,488.39 km) |
| South Portland to Sabinov | 4,098.70 mi (6,596.22 km) |
| South Portland to Sal'a | 4,009.68 mi (6,452.95 km) |
| South Portland to Samorin | 3,991.83 mi (6,424.22 km) |
| South Portland to Senec | 3,988.41 mi (6,418.73 km) |
| South Portland to Senica | 3,970.66 mi (6,390.15 km) |
| South Portland to Sered' | 3,998.96 mi (6,435.70 km) |
| South Portland to Skalica | 3,959.46 mi (6,372.13 km) |
| South Portland to Smizany | 4,083.07 mi (6,571.06 km) |
| South Portland to Snina | 4,143.81 mi (6,668.81 km) |
| South Portland to Spisska Nova Ves | 4,084.97 mi (6,574.12 km) |
| South Portland to Stara L'ubovna | 4,075.67 mi (6,559.15 km) |
| South Portland to Stara Tura | 3,980.11 mi (6,405.36 km) |
| South Portland to Stropkov | 4,116.47 mi (6,624.82 km) |
