| Potomac to Sabadell | 4,028.14 mi (6,482.67 km) |
| Potomac to Sabinanigo | 3,884.81 mi (6,252.00 km) |
| Potomac to Sagunto | 3,973.14 mi (6,394.15 km) |
| Potomac to Salamanca | 3,677.95 mi (5,919.09 km) |
| Potomac to Salobrena | 3,901.90 mi (6,279.51 km) |
| Potomac to Salou | 3,996.90 mi (6,432.39 km) |
| Potomac to Salt | 4,046.55 mi (6,512.29 km) |
| Potomac to Salvatierra de Mino | 3,512.99 mi (5,653.62 km) |
| Potomac to Sama | 3,615.94 mi (5,819.30 km) |
| Potomac to San Adrian de Besos | 4,036.88 mi (6,496.74 km) |
| Potomac to San Agustin de Guadalix | 3,784.06 mi (6,089.86 km) |
| Potomac to San Andres de la Barca | 4,025.14 mi (6,477.84 km) |
| Potomac to San Andres de Llevaneras | 4,044.78 mi (6,509.44 km) |
| Potomac to San Andres del Rabanedo | 3,637.30 mi (5,853.67 km) |
| Potomac to San Bartolome | 3,565.41 mi (5,737.97 km) |
