| Washougal to Sestu | 5,845.87 mi (9,408.02 km) |
| Washougal to Settimo Torinese | 5,469.19 mi (8,801.82 km) |
| Washougal to Seveso | 5,475.39 mi (8,811.79 km) |
| Washougal to Sezze | 5,821.95 mi (9,369.53 km) |
| Washougal to Siano | 5,905.23 mi (9,503.55 km) |
| Washougal to Siena | 5,668.86 mi (9,123.15 km) |
| Washougal to Signa | 5,635.33 mi (9,069.19 km) |
| Washougal to Silea | 5,553.99 mi (8,938.28 km) |
| Washougal to Silvi Paese | 5,785.06 mi (9,310.16 km) |
| Washougal to Sinalunga | 5,685.20 mi (9,149.44 km) |
| Washougal to Siniscola | 5,787.71 mi (9,314.41 km) |
| Washougal to Sinnai | 5,848.82 mi (9,412.76 km) |
| Washougal to Siracusa | 6,147.36 mi (9,893.23 km) |
| Washougal to Solaro | 5,475.67 mi (8,812.24 km) |
| Washougal to Soliera | 5,574.31 mi (8,970.99 km) |
