| Fort Collins to Solofra | 5,669.01 mi (9,123.39 km) |
| Fort Collins to Somma Lombardo | 5,213.23 mi (8,389.88 km) |
| Fort Collins to Somma Vesuviana | 5,652.60 mi (9,096.98 km) |
| Fort Collins to Sommacampagna | 5,300.91 mi (8,530.99 km) |
| Fort Collins to Sona | 5,298.71 mi (8,527.44 km) |
| Fort Collins to Sondrio | 5,229.92 mi (8,416.74 km) |
| Fort Collins to Sora | 5,580.79 mi (8,981.41 km) |
| Fort Collins to Sorbolo | 5,314.36 mi (8,552.63 km) |
| Fort Collins to Soresina | 5,272.43 mi (8,485.16 km) |
| Fort Collins to Sorisole | 5,243.60 mi (8,438.77 km) |
| Fort Collins to Sorrento | 5,662.96 mi (9,113.66 km) |
| Fort Collins to Sorso | 5,445.19 mi (8,763.19 km) |
| Fort Collins to Sortino | 5,865.32 mi (9,439.32 km) |
| Fort Collins to Soverato Marina | 5,840.29 mi (9,399.05 km) |
| Fort Collins to Sovicille | 5,418.77 mi (8,720.66 km) |
