| Hackettstown to Southern Pines (North Carolina) | 463.62 mi (746.12 km) |
| Hackettstown to Southfield (Michigan) | 449.35 mi (723.16 km) |
| Hackettstown to Southgate (Michigan) | 443.18 mi (713.24 km) |
| Hackettstown to Southlake (Texas) | 1,343.78 mi (2,162.61 km) |
| Hackettstown to Spanaway (Washington) | 2,367.91 mi (3,810.79 km) |
| Hackettstown to Spanish Fork (Utah) | 1,921.04 mi (3,091.61 km) |
| Hackettstown to Spanish Lake (Missouri) | 827.53 mi (1,331.78 km) |
| Hackettstown to Spanish Springs (Nevada) | 2,339.90 mi (3,765.70 km) |
| Hackettstown to Sparks (Nevada) | 2,343.95 mi (3,772.22 km) |
| Hackettstown to Spartanburg (South Carolina) | 562.23 mi (904.83 km) |
| Hackettstown to Spearfish (South Dakota) | 1,485.90 mi (2,391.33 km) |
| Hackettstown to Speedway (Indiana) | 605.70 mi (974.77 km) |
| Hackettstown to Spencer (Iowa) | 1,053.02 mi (1,694.68 km) |
| Hackettstown to Spokane (Washington) | 2,131.86 mi (3,430.90 km) |
| Hackettstown to Spokane Valley (Washington) | 2,122.66 mi (3,416.10 km) |
