| Ostend to Silver Firs (Washington) | 4,858.83 mi (7,819.53 km) |
| Ostend to Silver Spring (Maryland) | 3,790.00 mi (6,099.42 km) |
| Ostend to Silver Springs Shores (Florida) | 4,469.20 mi (7,192.48 km) |
| Ostend to Silverdale (Washington) | 4,883.70 mi (7,859.55 km) |
| Ostend to Silverton (Oregon) | 5,041.59 mi (8,113.66 km) |
| Ostend to Simi Valley (California) | 5,553.21 mi (8,937.02 km) |
| Ostend to Simpsonville (South Carolina) | 4,202.85 mi (6,763.84 km) |
| Ostend to Sioux City (Iowa) | 4,361.87 mi (7,019.75 km) |
| Ostend to Sioux Falls (South Dakota) | 4,321.92 mi (6,955.47 km) |
| Ostend to Skokie (Illinois) | 4,068.92 mi (6,548.30 km) |
| Ostend to Sleepy Hollow (New York) | 3,569.60 mi (5,744.72 km) |
| Ostend to Slidell (Louisiana) | 4,727.74 mi (7,608.55 km) |
| Ostend to Smithfield (North Carolina) | 4,005.84 mi (6,446.78 km) |
| Ostend to Smithfield (Utah) | 4,909.35 mi (7,900.83 km) |
| Ostend to Smithville (Missouri) | 4,451.56 mi (7,164.10 km) |
