| Upminster to Smyrna (Delaware) | 3,603.42 mi (5,799.14 km) |
| Upminster to Smyrna (Georgia) | 4,220.63 mi (6,792.45 km) |
| Upminster to Smyrna (Tennessee) | 4,198.87 mi (6,757.43 km) |
| Upminster to Snellville (Georgia) | 4,200.14 mi (6,759.47 km) |
| Upminster to Snoqualmie (Washington) | 4,783.09 mi (7,697.65 km) |
| Upminster to Snyder (Texas) | 4,920.56 mi (7,918.88 km) |
| Upminster to Socastee (South Carolina) | 4,003.18 mi (6,442.49 km) |
| Upminster to Socorro (Texas) | 5,175.53 mi (8,329.22 km) |
| Upminster to Soddy-Daisy (Tennessee) | 4,179.33 mi (6,725.98 km) |
| Upminster to Solana Beach (California) | 5,479.20 mi (8,817.92 km) |
| Upminster to Soledad (California) | 5,408.28 mi (8,703.79 km) |
| Upminster to Solon (Ohio) | 3,743.58 mi (6,024.70 km) |
| Upminster to Somers Point (New Jersey) | 3,561.42 mi (5,731.55 km) |
| Upminster to Somerset (Kentucky) | 4,068.92 mi (6,548.30 km) |
| Upminster to Somerset (New Jersey) | 3,504.64 mi (5,640.17 km) |
