| Santo Tirso to Smyrna (Delaware) | 3,448.46 mi (5,549.76 km) |
| Santo Tirso to Smyrna (Georgia) | 4,061.35 mi (6,536.11 km) |
| Santo Tirso to Smyrna (Tennessee) | 4,082.98 mi (6,570.92 km) |
| Santo Tirso to Snellville (Georgia) | 4,036.50 mi (6,496.12 km) |
| Santo Tirso to Snoqualmie (Washington) | 5,070.14 mi (8,159.60 km) |
| Santo Tirso to Snyder (Texas) | 4,887.17 mi (7,865.13 km) |
| Santo Tirso to Socastee (South Carolina) | 3,795.93 mi (6,108.96 km) |
| Santo Tirso to Socorro (Texas) | 5,178.19 mi (8,333.49 km) |
| Santo Tirso to Soddy-Daisy (Tennessee) | 4,043.28 mi (6,507.02 km) |
| Santo Tirso to Solana Beach (California) | 5,595.15 mi (9,004.53 km) |
| Santo Tirso to Soledad (California) | 5,592.27 mi (8,999.89 km) |
| Santo Tirso to Solon (Ohio) | 3,663.01 mi (5,895.04 km) |
| Santo Tirso to Somers Point (New Jersey) | 3,399.27 mi (5,470.59 km) |
| Santo Tirso to Somerset (Kentucky) | 3,952.26 mi (6,360.55 km) |
| Santo Tirso to Somerset (New Jersey) | 3,360.17 mi (5,407.67 km) |
