| Chicago Heights to Sinop | 5,652.42 mi (9,096.69 km) |
| Chicago Heights to Siran | 5,880.22 mi (9,463.29 km) |
| Chicago Heights to Sirnak | 6,134.77 mi (9,872.95 km) |
| Chicago Heights to Sirvan | 6,090.51 mi (9,801.72 km) |
| Chicago Heights to Sivas | 5,836.04 mi (9,392.20 km) |
| Chicago Heights to Sivasli | 5,648.72 mi (9,090.74 km) |
| Chicago Heights to Siverek | 6,021.11 mi (9,690.04 km) |
| Chicago Heights to Sivrice | 5,982.41 mi (9,627.76 km) |
| Chicago Heights to Sivrihisar | 5,665.31 mi (9,117.43 km) |
| Chicago Heights to Sogut | 5,588.02 mi (8,993.05 km) |
| Chicago Heights to Sogutlu | 5,553.47 mi (8,937.44 km) |
| Chicago Heights to Soke | 5,601.88 mi (9,015.36 km) |
| Chicago Heights to Solhan | 6,009.04 mi (9,670.61 km) |
| Chicago Heights to Soma | 5,537.10 mi (8,911.10 km) |
| Chicago Heights to Sorgun | 5,771.85 mi (9,288.90 km) |
