| Port Huron to Spello | 4,514.71 mi (7,265.73 km) |
| Port Huron to Spilamberto | 4,385.16 mi (7,057.24 km) |
| Port Huron to Spilimbergo | 4,395.20 mi (7,073.39 km) |
| Port Huron to Spinea | 4,392.31 mi (7,068.74 km) |
| Port Huron to Spoleto | 4,524.86 mi (7,282.06 km) |
| Port Huron to Spoltore | 4,596.37 mi (7,397.14 km) |
| Port Huron to Spresiano | 4,384.20 mi (7,055.69 km) |
| Port Huron to Squinzano | 4,841.67 mi (7,791.91 km) |
| Port Huron to Statte | 4,801.48 mi (7,727.23 km) |
| Port Huron to Stezzano | 4,286.51 mi (6,898.47 km) |
| Port Huron to Strada | 4,435.45 mi (7,138.17 km) |
| Port Huron to Stradella | 4,294.36 mi (6,911.11 km) |
| Port Huron to Striano | 4,683.39 mi (7,537.19 km) |
| Port Huron to Subiaco | 4,576.02 mi (7,364.39 km) |
| Port Huron to Sulmona | 4,604.88 mi (7,410.83 km) |
