| Castel Gandolfo to Smyrna (Delaware) | 4,418.31 mi (7,110.58 km) |
| Castel Gandolfo to Smyrna (Georgia) | 5,038.30 mi (8,108.36 km) |
| Castel Gandolfo to Smyrna (Tennessee) | 5,033.92 mi (8,101.31 km) |
| Castel Gandolfo to Snellville (Georgia) | 5,015.78 mi (8,072.12 km) |
| Castel Gandolfo to Snoqualmie (Washington) | 5,670.00 mi (9,124.99 km) |
| Castel Gandolfo to Snyder (Texas) | 5,786.47 mi (9,312.42 km) |
| Castel Gandolfo to Socastee (South Carolina) | 4,797.26 mi (7,720.45 km) |
| Castel Gandolfo to Socorro (Texas) | 6,051.41 mi (9,738.80 km) |
| Castel Gandolfo to Soddy-Daisy (Tennessee) | 5,006.38 mi (8,057.00 km) |
| Castel Gandolfo to Solana Beach (California) | 6,372.39 mi (10,255.36 km) |
| Castel Gandolfo to Soledad (California) | 6,302.96 mi (10,143.64 km) |
| Castel Gandolfo to Solon (Ohio) | 4,588.15 mi (7,383.91 km) |
| Castel Gandolfo to Somers Point (New Jersey) | 4,372.85 mi (7,037.42 km) |
| Castel Gandolfo to Somerset (Kentucky) | 4,902.81 mi (7,890.31 km) |
| Castel Gandolfo to Somerset (New Jersey) | 4,323.10 mi (6,957.36 km) |
