| Arco to Smyrna (Delaware) | 4,200.87 mi (6,760.64 km) |
| Arco to Smyrna (Georgia) | 4,820.19 mi (7,757.35 km) |
| Arco to Smyrna (Tennessee) | 4,805.85 mi (7,734.27 km) |
| Arco to Snellville (Georgia) | 4,798.76 mi (7,722.86 km) |
| Arco to Snoqualmie (Washington) | 5,376.19 mi (8,652.14 km) |
| Arco to Snyder (Texas) | 5,538.60 mi (8,913.52 km) |
| Arco to Socastee (South Carolina) | 4,591.38 mi (7,389.12 km) |
| Arco to Socorro (Texas) | 5,795.66 mi (9,327.22 km) |
| Arco to Soddy-Daisy (Tennessee) | 4,782.95 mi (7,697.41 km) |
| Arco to Solana Beach (California) | 6,096.44 mi (9,811.28 km) |
| Arco to Soledad (California) | 6,018.05 mi (9,685.12 km) |
| Arco to Solon (Ohio) | 4,353.93 mi (7,006.98 km) |
| Arco to Somers Point (New Jersey) | 4,157.19 mi (6,690.35 km) |
| Arco to Somerset (Kentucky) | 4,675.30 mi (7,524.17 km) |
| Arco to Somerset (New Jersey) | 4,103.59 mi (6,604.08 km) |
