| Allentown to Sugar Hill (Georgia) | 649.80 mi (1,045.75 km) |
| Allentown to Sugar Land (Texas) | 1,364.71 mi (2,196.29 km) |
| Allentown to Sugarland Run (Virginia) | 147.88 mi (237.99 km) |
| Allentown to Sugarmill Woods (Florida) | 911.12 mi (1,466.31 km) |
| Allentown to Suisun City (California) | 2,459.97 mi (3,958.93 km) |
| Allentown to Suitland (Maryland) | 143.11 mi (230.31 km) |
| Allentown to Sulphur (Louisiana) | 1,231.75 mi (1,982.31 km) |
| Allentown to Sulphur Springs (Texas) | 1,222.63 mi (1,967.63 km) |
| Allentown to Summerfield (Maryland) | 138.32 mi (222.61 km) |
| Allentown to Summerfield (North Carolina) | 386.87 mi (622.61 km) |
| Allentown to Summerlin South (Nevada) | 2,162.71 mi (3,480.54 km) |
| Allentown to Summerville (South Carolina) | 585.49 mi (942.26 km) |
| Allentown to Summit (Illinois) | 646.23 mi (1,040.01 km) |
| Allentown to Summit (New Jersey) | 58.81 mi (94.65 km) |
| Allentown to Sumner (Washington) | 2,335.86 mi (3,759.20 km) |
