| SeaTac to Spello | 5,611.77 mi (9,031.27 km) |
| SeaTac to Spilamberto | 5,478.22 mi (8,816.35 km) |
| SeaTac to Spilimbergo | 5,427.19 mi (8,734.22 km) |
| SeaTac to Spinea | 5,448.39 mi (8,768.34 km) |
| SeaTac to Spoleto | 5,626.15 mi (9,054.41 km) |
| SeaTac to Spoltore | 5,679.74 mi (9,140.67 km) |
| SeaTac to Spresiano | 5,433.06 mi (8,743.66 km) |
| SeaTac to Squinzano | 5,895.81 mi (9,488.39 km) |
| SeaTac to Statte | 5,868.01 mi (9,443.64 km) |
| SeaTac to Stezzano | 5,377.93 mi (8,654.94 km) |
| SeaTac to Strada | 5,542.54 mi (8,919.86 km) |
| SeaTac to Stradella | 5,402.70 mi (8,694.80 km) |
| SeaTac to Striano | 5,790.10 mi (9,318.27 km) |
| SeaTac to Subiaco | 5,686.19 mi (9,151.04 km) |
| SeaTac to Sulmona | 5,699.40 mi (9,172.30 km) |
