| SeaTac to Sesena | 5,312.33 mi (8,549.38 km) |
| SeaTac to Sestao | 5,158.65 mi (8,302.04 km) |
| SeaTac to Sevilla | 5,392.39 mi (8,678.21 km) |
| SeaTac to Sevilla La Nueva | 5,288.34 mi (8,510.76 km) |
| SeaTac to Silla | 5,457.79 mi (8,783.47 km) |
| SeaTac to Silleda | 5,025.17 mi (8,087.24 km) |
| SeaTac to Sitges | 5,419.77 mi (8,722.27 km) |
| SeaTac to Socuellamos | 5,385.99 mi (8,667.91 km) |
| SeaTac to Soller | 5,529.95 mi (8,899.60 km) |
| SeaTac to Solsona | 5,368.23 mi (8,639.34 km) |
| SeaTac to Son Servera | 5,557.95 mi (8,944.66 km) |
| SeaTac to Sonseca | 5,326.28 mi (8,571.82 km) |
| SeaTac to Sopelana | 5,155.60 mi (8,297.13 km) |
| SeaTac to Soria | 5,260.03 mi (8,465.20 km) |
| SeaTac to Suances | 5,119.69 mi (8,239.34 km) |
