| Riverdale to Smyrna (Delaware) | 628.86 mi (1,012.05 km) |
| Riverdale to Smyrna (Georgia) | 21.57 mi (34.72 km) |
| Riverdale to Smyrna (Tennessee) | 205.01 mi (329.93 km) |
| Riverdale to Snellville (Georgia) | 30.88 mi (49.70 km) |
| Riverdale to Snoqualmie (Washington) | 2,161.64 mi (3,478.82 km) |
| Riverdale to Snyder (Texas) | 955.49 mi (1,537.71 km) |
| Riverdale to Socastee (South Carolina) | 310.85 mi (500.27 km) |
| Riverdale to Socorro (Texas) | 1,276.37 mi (2,054.12 km) |
| Riverdale to Soddy-Daisy (Tennessee) | 124.82 mi (200.88 km) |
| Riverdale to Solana Beach (California) | 1,889.73 mi (3,041.22 km) |
| Riverdale to Soledad (California) | 2,086.93 mi (3,358.59 km) |
| Riverdale to Solon (Ohio) | 564.39 mi (908.30 km) |
| Riverdale to Somers Point (New Jersey) | 673.81 mi (1,084.40 km) |
| Riverdale to Somerset (Kentucky) | 243.44 mi (391.77 km) |
| Riverdale to Somerset (New Jersey) | 726.40 mi (1,169.03 km) |
