| Castelo Branco to Smyrna (Delaware) | 3,534.76 mi (5,688.65 km) |
| Castelo Branco to Smyrna (Georgia) | 4,145.16 mi (6,671.00 km) |
| Castelo Branco to Smyrna (Tennessee) | 4,171.01 mi (6,712.59 km) |
| Castelo Branco to Snellville (Georgia) | 4,119.95 mi (6,630.42 km) |
| Castelo Branco to Snoqualmie (Washington) | 5,183.05 mi (8,341.32 km) |
| Castelo Branco to Snyder (Texas) | 4,980.61 mi (8,015.52 km) |
| Castelo Branco to Socastee (South Carolina) | 3,875.54 mi (6,237.08 km) |
| Castelo Branco to Socorro (Texas) | 5,274.02 mi (8,487.72 km) |
| Castelo Branco to Soddy-Daisy (Tennessee) | 4,129.47 mi (6,645.75 km) |
| Castelo Branco to Solana Beach (California) | 5,698.60 mi (9,171.01 km) |
| Castelo Branco to Soledad (California) | 5,699.88 mi (9,173.06 km) |
| Castelo Branco to Solon (Ohio) | 3,755.52 mi (6,043.93 km) |
| Castelo Branco to Somers Point (New Jersey) | 3,485.04 mi (5,608.64 km) |
| Castelo Branco to Somerset (Kentucky) | 4,040.60 mi (6,502.72 km) |
| Castelo Branco to Somerset (New Jersey) | 3,447.83 mi (5,548.75 km) |
