| Idanha-a-Nova to Smyrna (Delaware) | 3,545.12 mi (5,705.33 km) |
| Idanha-a-Nova to Smyrna (Georgia) | 4,155.91 mi (6,688.29 km) |
| Idanha-a-Nova to Smyrna (Tennessee) | 4,181.13 mi (6,728.88 km) |
| Idanha-a-Nova to Snellville (Georgia) | 4,130.75 mi (6,647.80 km) |
| Idanha-a-Nova to Snoqualmie (Washington) | 5,186.72 mi (8,347.22 km) |
| Idanha-a-Nova to Snyder (Texas) | 4,989.84 mi (8,030.37 km) |
| Idanha-a-Nova to Socastee (South Carolina) | 3,886.84 mi (6,255.27 km) |
| Idanha-a-Nova to Socorro (Texas) | 5,282.80 mi (8,501.85 km) |
| Idanha-a-Nova to Soddy-Daisy (Tennessee) | 4,139.87 mi (6,662.48 km) |
| Idanha-a-Nova to Solana Beach (California) | 5,705.67 mi (9,182.38 km) |
| Idanha-a-Nova to Soledad (California) | 5,705.72 mi (9,182.48 km) |
| Idanha-a-Nova to Solon (Ohio) | 3,764.88 mi (6,058.99 km) |
| Idanha-a-Nova to Somers Point (New Jersey) | 3,495.48 mi (5,625.43 km) |
| Idanha-a-Nova to Somerset (Kentucky) | 4,050.67 mi (6,518.92 km) |
| Idanha-a-Nova to Somerset (New Jersey) | 3,457.98 mi (5,565.08 km) |
