| Port Huron to Sinop | 5,402.09 mi (8,693.83 km) |
| Port Huron to Siran | 5,632.70 mi (9,064.95 km) |
| Port Huron to Sirnak | 5,888.40 mi (9,476.46 km) |
| Port Huron to Sirvan | 5,844.25 mi (9,405.41 km) |
| Port Huron to Sivas | 5,584.82 mi (8,987.90 km) |
| Port Huron to Sivasli | 5,386.48 mi (8,668.71 km) |
| Port Huron to Siverek | 5,770.26 mi (9,286.34 km) |
| Port Huron to Sivrice | 5,732.57 mi (9,225.68 km) |
| Port Huron to Sivrihisar | 5,406.54 mi (8,700.98 km) |
| Port Huron to Sogut | 5,328.45 mi (8,575.32 km) |
| Port Huron to Sogutlu | 5,295.52 mi (8,522.32 km) |
| Port Huron to Soke | 5,336.25 mi (8,587.87 km) |
| Port Huron to Solhan | 5,762.60 mi (9,274.00 km) |
| Port Huron to Soma | 5,273.54 mi (8,486.94 km) |
| Port Huron to Sorgun | 5,518.23 mi (8,880.73 km) |
