| Olbia to Silver Firs (Washington) | 5,627.28 mi (9,056.24 km) |
| Olbia to Silver Spring (Maryland) | 4,380.14 mi (7,049.16 km) |
| Olbia to Silver Springs Shores (Florida) | 5,007.20 mi (8,058.31 km) |
| Olbia to Silverdale (Washington) | 5,652.57 mi (9,096.93 km) |
| Olbia to Silverton (Oregon) | 5,807.18 mi (9,345.75 km) |
| Olbia to Simi Valley (California) | 6,289.05 mi (10,121.26 km) |
| Olbia to Simpsonville (South Carolina) | 4,785.58 mi (7,701.65 km) |
| Olbia to Sioux City (Iowa) | 5,054.03 mi (8,133.68 km) |
| Olbia to Sioux Falls (South Dakota) | 5,020.23 mi (8,079.28 km) |
| Olbia to Skokie (Illinois) | 4,727.24 mi (7,607.76 km) |
| Olbia to Sleepy Hollow (New York) | 4,162.81 mi (6,699.39 km) |
| Olbia to Slidell (Louisiana) | 5,319.66 mi (8,561.17 km) |
| Olbia to Smithfield (North Carolina) | 4,573.99 mi (7,361.12 km) |
| Olbia to Smithfield (Utah) | 5,645.84 mi (9,086.10 km) |
| Olbia to Smithville (Missouri) | 5,121.16 mi (8,241.71 km) |
