| Hackettstown to Sestu | 4,252.96 mi (6,844.48 km) |
| Hackettstown to Settimo Torinese | 3,995.76 mi (6,430.56 km) |
| Hackettstown to Seveso | 4,038.14 mi (6,498.76 km) |
| Hackettstown to Sezze | 4,351.61 mi (7,003.24 km) |
| Hackettstown to Siano | 4,448.92 mi (7,159.85 km) |
| Hackettstown to Siena | 4,210.88 mi (6,776.76 km) |
| Hackettstown to Signa | 4,184.73 mi (6,734.67 km) |
| Hackettstown to Silea | 4,171.43 mi (6,713.26 km) |
| Hackettstown to Silvi Paese | 4,358.91 mi (7,014.99 km) |
| Hackettstown to Sinalunga | 4,231.87 mi (6,810.54 km) |
| Hackettstown to Siniscola | 4,235.00 mi (6,815.58 km) |
| Hackettstown to Sinnai | 4,257.94 mi (6,852.49 km) |
| Hackettstown to Siracusa | 4,619.03 mi (7,433.62 km) |
| Hackettstown to Solaro | 4,036.78 mi (6,496.57 km) |
| Hackettstown to Soliera | 4,144.51 mi (6,669.94 km) |
