| Longford to Smyrna (Delaware) | 3,239.22 mi (5,213.02 km) |
| Longford to Smyrna (Georgia) | 3,855.30 mi (6,204.51 km) |
| Longford to Smyrna (Tennessee) | 3,831.21 mi (6,165.74 km) |
| Longford to Snellville (Georgia) | 3,835.15 mi (6,172.08 km) |
| Longford to Snoqualmie (Washington) | 4,450.29 mi (7,162.05 km) |
| Longford to Snyder (Texas) | 4,551.73 mi (7,325.30 km) |
| Longford to Socastee (South Carolina) | 3,642.43 mi (5,861.93 km) |
| Longford to Socorro (Texas) | 4,807.96 mi (7,737.66 km) |
| Longford to Soddy-Daisy (Tennessee) | 3,812.66 mi (6,135.89 km) |
| Longford to Solana Beach (California) | 5,120.76 mi (8,241.06 km) |
| Longford to Soledad (California) | 5,058.58 mi (8,141.00 km) |
| Longford to Solon (Ohio) | 3,375.17 mi (5,431.81 km) |
| Longford to Somers Point (New Jersey) | 3,197.92 mi (5,146.55 km) |
| Longford to Somerset (Kentucky) | 3,701.47 mi (5,956.93 km) |
| Longford to Somerset (New Jersey) | 3,139.93 mi (5,053.23 km) |
