| Greenock to Smyrna (Delaware) | 3,328.28 mi (5,356.35 km) |
| Greenock to Smyrna (Georgia) | 3,939.46 mi (6,339.95 km) |
| Greenock to Smyrna (Tennessee) | 3,905.47 mi (6,285.25 km) |
| Greenock to Snellville (Georgia) | 3,920.48 mi (6,309.41 km) |
| Greenock to Snoqualmie (Washington) | 4,418.88 mi (7,111.51 km) |
| Greenock to Snyder (Texas) | 4,600.81 mi (7,404.28 km) |
| Greenock to Socastee (South Carolina) | 3,739.41 mi (6,018.00 km) |
| Greenock to Socorro (Texas) | 4,846.63 mi (7,799.90 km) |
| Greenock to Soddy-Daisy (Tennessee) | 3,891.80 mi (6,263.25 km) |
| Greenock to Solana Beach (California) | 5,129.79 mi (8,255.60 km) |
| Greenock to Soledad (California) | 5,050.91 mi (8,128.66 km) |
| Greenock to Solon (Ohio) | 3,445.28 mi (5,544.64 km) |
| Greenock to Somers Point (New Jersey) | 3,289.09 mi (5,293.28 km) |
| Greenock to Somerset (Kentucky) | 3,777.05 mi (6,078.57 km) |
| Greenock to Somerset (New Jersey) | 3,227.66 mi (5,194.41 km) |
