| Langley Park to Sestu | 4,416.10 mi (7,107.03 km) |
| Langley Park to Settimo Torinese | 4,163.27 mi (6,700.14 km) |
| Langley Park to Seveso | 4,206.34 mi (6,769.46 km) |
| Langley Park to Sezze | 4,518.07 mi (7,271.14 km) |
| Langley Park to Siano | 4,615.44 mi (7,427.83 km) |
| Langley Park to Siena | 4,378.09 mi (7,045.86 km) |
| Langley Park to Signa | 4,352.20 mi (7,004.18 km) |
| Langley Park to Silea | 4,340.37 mi (6,985.15 km) |
| Langley Park to Silvi Paese | 4,526.43 mi (7,284.58 km) |
| Langley Park to Sinalunga | 4,399.13 mi (7,079.72 km) |
| Langley Park to Siniscola | 4,399.52 mi (7,080.35 km) |
| Langley Park to Sinnai | 4,421.13 mi (7,115.12 km) |
| Langley Park to Siracusa | 4,782.93 mi (7,697.39 km) |
| Langley Park to Solaro | 4,204.95 mi (6,767.22 km) |
| Langley Park to Soliera | 4,312.57 mi (6,940.40 km) |
