| Hackettstown to Somersworth (New Hampshire) | 261.37 mi (420.64 km) |
| Hackettstown to Somerton (Arizona) | 2,259.68 mi (3,636.60 km) |
| Hackettstown to Somerville (Massachusetts) | 219.69 mi (353.56 km) |
| Hackettstown to Somerville (New Jersey) | 22.69 mi (36.51 km) |
| Hackettstown to Sonoma (California) | 2,511.74 mi (4,042.25 km) |
| Hackettstown to Soquel (California) | 2,516.37 mi (4,049.70 km) |
| Hackettstown to South Bend (Indiana) | 596.60 mi (960.14 km) |
| Hackettstown to South Bradenton (Florida) | 1,025.04 mi (1,649.65 km) |
| Hackettstown to South Burlington (Vermont) | 262.30 mi (422.12 km) |
| Hackettstown to South Charleston (West Virginia) | 405.61 mi (652.77 km) |
| Hackettstown to South Daytona (Florida) | 879.43 mi (1,415.31 km) |
| Hackettstown to South El Monte (California) | 2,392.07 mi (3,849.66 km) |
| Hackettstown to South Elgin (Illinois) | 702.46 mi (1,130.50 km) |
| Hackettstown to South Euclid (Ohio) | 351.28 mi (565.33 km) |
| Hackettstown to South Farmingdale (New York) | 72.72 mi (117.04 km) |
