| South Portland to Rovinj | 3,947.34 mi (6,352.64 km) |
| South Portland to Samobor | 4,007.87 mi (6,450.04 km) |
| South Portland to Sesvete | 4,023.04 mi (6,474.47 km) |
| South Portland to Sibenik | 4,091.16 mi (6,584.08 km) |
| South Portland to Sinj | 4,123.59 mi (6,636.27 km) |
| South Portland to Sisak | 4,046.33 mi (6,511.94 km) |
| South Portland to Slatina | 4,092.46 mi (6,586.18 km) |
| South Portland to Slavonski Brod | 4,125.40 mi (6,639.18 km) |
| South Portland to Solin | 4,124.14 mi (6,637.17 km) |
| South Portland to Split | 4,122.67 mi (6,634.80 km) |
| South Portland to Sveti Ivan Zelina | 4,023.60 mi (6,475.37 km) |
| South Portland to Trilj | 4,130.23 mi (6,646.96 km) |
| South Portland to Trogir | 4,114.49 mi (6,621.64 km) |
| South Portland to Umag | 3,930.06 mi (6,324.82 km) |
| South Portland to Valpovo | 4,122.81 mi (6,635.02 km) |
