| Opfikon to Smyrna (Delaware) | 4,055.65 mi (6,526.94 km) |
| Opfikon to Smyrna (Georgia) | 4,674.57 mi (7,523.00 km) |
| Opfikon to Smyrna (Tennessee) | 4,658.28 mi (7,496.78 km) |
| Opfikon to Snellville (Georgia) | 4,653.38 mi (7,488.90 km) |
| Opfikon to Snoqualmie (Washington) | 5,229.63 mi (8,416.28 km) |
| Opfikon to Snyder (Texas) | 5,387.94 mi (8,671.06 km) |
| Opfikon to Socastee (South Carolina) | 4,448.62 mi (7,159.35 km) |
| Opfikon to Socorro (Texas) | 5,644.28 mi (9,083.58 km) |
| Opfikon to Soddy-Daisy (Tennessee) | 4,636.26 mi (7,461.34 km) |
| Opfikon to Solana Beach (California) | 5,945.07 mi (9,567.67 km) |
| Opfikon to Soledad (California) | 5,868.10 mi (9,443.79 km) |
| Opfikon to Solon (Ohio) | 4,205.40 mi (6,767.94 km) |
| Opfikon to Somers Point (New Jersey) | 4,012.39 mi (6,457.32 km) |
| Opfikon to Somerset (Kentucky) | 4,527.87 mi (7,286.90 km) |
| Opfikon to Somerset (New Jersey) | 3,957.97 mi (6,369.74 km) |
