| Front Royal to Sinop | 5,454.63 mi (8,778.38 km) |
| Front Royal to Siran | 5,691.14 mi (9,159.01 km) |
| Front Royal to Sirnak | 5,948.29 mi (9,572.84 km) |
| Front Royal to Sirvan | 5,904.66 mi (9,502.64 km) |
| Front Royal to Sivas | 5,633.96 mi (9,066.99 km) |
| Front Royal to Sivasli | 5,404.49 mi (8,697.68 km) |
| Front Royal to Siverek | 5,819.36 mi (9,365.35 km) |
| Front Royal to Sivrice | 5,784.51 mi (9,309.26 km) |
| Front Royal to Sivrihisar | 5,435.32 mi (8,747.31 km) |
| Front Royal to Sogut | 5,355.24 mi (8,618.43 km) |
| Front Royal to Sogutlu | 5,327.39 mi (8,573.61 km) |
| Front Royal to Soke | 5,343.06 mi (8,598.82 km) |
| Front Royal to Solhan | 5,823.02 mi (9,371.24 km) |
| Front Royal to Soma | 5,287.81 mi (8,509.92 km) |
| Front Royal to Sorgun | 5,561.25 mi (8,949.96 km) |
