| Allentown to Somersworth (New Hampshire) | 298.90 mi (481.03 km) |
| Allentown to Somerton (Arizona) | 2,225.15 mi (3,581.03 km) |
| Allentown to Somerville (Massachusetts) | 258.07 mi (415.32 km) |
| Allentown to Somerville (New Jersey) | 45.50 mi (73.23 km) |
| Allentown to Sonoma (California) | 2,482.15 mi (3,994.63 km) |
| Allentown to Soquel (California) | 2,485.82 mi (4,000.54 km) |
| Allentown to South Bend (Indiana) | 566.25 mi (911.29 km) |
| Allentown to South Bradenton (Florida) | 993.69 mi (1,599.19 km) |
| Allentown to South Burlington (Vermont) | 290.73 mi (467.88 km) |
| Allentown to South Charleston (West Virginia) | 367.32 mi (591.15 km) |
| Allentown to South Daytona (Florida) | 849.20 mi (1,366.66 km) |
| Allentown to South El Monte (California) | 2,358.97 mi (3,796.40 km) |
| Allentown to South Elgin (Illinois) | 672.72 mi (1,082.64 km) |
| Allentown to South Euclid (Ohio) | 321.52 mi (517.43 km) |
| Allentown to South Farmingdale (New York) | 106.64 mi (171.63 km) |
