| Hackettstown to Solofra | 4,454.59 mi (7,168.96 km) |
| Hackettstown to Somma Lombardo | 4,018.18 mi (6,466.64 km) |
| Hackettstown to Somma Vesuviana | 4,435.00 mi (7,137.44 km) |
| Hackettstown to Sommacampagna | 4,119.01 mi (6,628.90 km) |
| Hackettstown to Sona | 4,117.18 mi (6,625.97 km) |
| Hackettstown to Sondrio | 4,052.10 mi (6,521.23 km) |
| Hackettstown to Sora | 4,367.76 mi (7,029.22 km) |
| Hackettstown to Sorbolo | 4,120.50 mi (6,631.30 km) |
| Hackettstown to Soresina | 4,080.53 mi (6,566.98 km) |
| Hackettstown to Sorisole | 4,057.16 mi (6,529.37 km) |
| Hackettstown to Sorrento | 4,441.39 mi (7,147.73 km) |
| Hackettstown to Sorso | 4,176.64 mi (6,721.66 km) |
| Hackettstown to Sortino | 4,603.68 mi (7,408.91 km) |
| Hackettstown to Soverato Marina | 4,612.30 mi (7,422.79 km) |
| Hackettstown to Sovicille | 4,207.84 mi (6,771.87 km) |
