| South Portland to Sabadell | 3,563.60 mi (5,735.05 km) |
| South Portland to Sabinanigo | 3,420.13 mi (5,504.17 km) |
| South Portland to Sagunto | 3,515.59 mi (5,657.79 km) |
| South Portland to Salamanca | 3,222.48 mi (5,186.08 km) |
| South Portland to Salobrena | 3,457.70 mi (5,564.63 km) |
| South Portland to Salou | 3,534.32 mi (5,687.94 km) |
| South Portland to Salt | 3,580.49 mi (5,762.25 km) |
| South Portland to Salvatierra de Mino | 3,056.90 mi (4,919.61 km) |
| South Portland to Sama | 3,153.68 mi (5,075.36 km) |
| South Portland to San Adrian de Besos | 3,572.51 mi (5,749.39 km) |
| South Portland to San Agustin de Guadalix | 3,327.28 mi (5,354.73 km) |
| South Portland to San Andres de la Barca | 3,560.94 mi (5,730.77 km) |
| South Portland to San Andres de Llevaneras | 3,579.85 mi (5,761.21 km) |
| South Portland to San Andres del Rabanedo | 3,176.87 mi (5,112.67 km) |
| South Portland to San Bartolome | 3,189.91 mi (5,133.67 km) |
