| Vila Nova de Gaia to Silver Firs (Washington) | 5,069.99 mi (8,159.36 km) |
| Vila Nova de Gaia to Silver Spring (Maryland) | 3,523.21 mi (5,670.05 km) |
| Vila Nova de Gaia to Silver Springs Shores (Florida) | 4,108.68 mi (6,612.28 km) |
| Vila Nova de Gaia to Silverdale (Washington) | 5,097.25 mi (8,203.23 km) |
| Vila Nova de Gaia to Silverton (Oregon) | 5,229.67 mi (8,416.35 km) |
| Vila Nova de Gaia to Simi Valley (California) | 5,597.76 mi (9,008.73 km) |
| Vila Nova de Gaia to Simpsonville (South Carolina) | 3,917.20 mi (6,304.12 km) |
| Vila Nova de Gaia to Sioux City (Iowa) | 4,299.54 mi (6,919.45 km) |
| Vila Nova de Gaia to Sioux Falls (South Dakota) | 4,276.47 mi (6,882.31 km) |
| Vila Nova de Gaia to Skokie (Illinois) | 3,931.76 mi (6,327.56 km) |
| Vila Nova de Gaia to Sleepy Hollow (New York) | 3,312.02 mi (5,330.18 km) |
| Vila Nova de Gaia to Slidell (Louisiana) | 4,451.52 mi (7,164.03 km) |
| Vila Nova de Gaia to Smithfield (North Carolina) | 3,698.15 mi (5,951.59 km) |
| Vila Nova de Gaia to Smithfield (Utah) | 4,968.48 mi (7,996.00 km) |
| Vila Nova de Gaia to Smithville (Missouri) | 4,332.85 mi (6,973.06 km) |
