| Prospect Heights to Sinop | 5,630.04 mi (9,060.68 km) |
| Prospect Heights to Siran | 5,857.03 mi (9,425.98 km) |
| Prospect Heights to Sirnak | 6,111.23 mi (9,835.07 km) |
| Prospect Heights to Sirvan | 6,066.95 mi (9,763.81 km) |
| Prospect Heights to Sivas | 5,813.87 mi (9,356.52 km) |
| Prospect Heights to Sivasli | 5,630.07 mi (9,060.72 km) |
| Prospect Heights to Siverek | 5,998.80 mi (9,654.13 km) |
| Prospect Heights to Sivrice | 5,959.83 mi (9,591.42 km) |
| Prospect Heights to Sivrihisar | 5,645.46 mi (9,085.49 km) |
| Prospect Heights to Sogut | 5,568.45 mi (8,961.56 km) |
| Prospect Heights to Sogutlu | 5,533.38 mi (8,905.11 km) |
| Prospect Heights to Soke | 5,584.50 mi (8,987.39 km) |
| Prospect Heights to Solhan | 5,985.54 mi (9,632.80 km) |
| Prospect Heights to Soma | 5,518.95 mi (8,881.88 km) |
| Prospect Heights to Sorgun | 5,750.39 mi (9,254.35 km) |
