| Allentown to Superior (Colorado) | 1,558.20 mi (2,507.68 km) |
| Allentown to Superior (Wisconsin) | 928.54 mi (1,494.34 km) |
| Allentown to Surprise (Arizona) | 2,075.74 mi (3,340.58 km) |
| Allentown to Susanville (California) | 2,344.48 mi (3,773.08 km) |
| Allentown to Sussex (Wisconsin) | 678.18 mi (1,091.43 km) |
| Allentown to Suwanee (Georgia) | 653.16 mi (1,051.16 km) |
| Allentown to Swansea (Illinois) | 784.65 mi (1,262.77 km) |
| Allentown to Sweetwater (Florida) | 1,061.80 mi (1,708.80 km) |
| Allentown to Sweetwater (Texas) | 1,487.32 mi (2,393.61 km) |
| Allentown to Sycamore (Illinois) | 691.63 mi (1,113.07 km) |
| Allentown to Sylacauga (Alabama) | 784.98 mi (1,263.31 km) |
| Allentown to Sylvania (Ohio) | 435.03 mi (700.11 km) |
| Allentown to Syosset (New York) | 104.48 mi (168.14 km) |
| Allentown to Syracuse (New York) | 172.37 mi (277.41 km) |
| Allentown to Syracuse (Utah) | 1,898.89 mi (3,055.98 km) |
