| Shannon to Sestao | 703.35 mi (1,131.94 km) |
| Shannon to Sevilla | 1,078.12 mi (1,735.07 km) |
| Shannon to Sevilla La Nueva | 884.34 mi (1,423.21 km) |
| Shannon to Silla | 1,006.14 mi (1,619.23 km) |
| Shannon to Silleda | 692.50 mi (1,114.47 km) |
| Shannon to Sitges | 937.09 mi (1,508.10 km) |
| Shannon to Socuellamos | 971.14 mi (1,562.90 km) |
| Shannon to Soller | 1,048.68 mi (1,687.69 km) |
| Shannon to Solsona | 883.98 mi (1,422.62 km) |
| Shannon to Son Servera | 1,074.12 mi (1,728.62 km) |
| Shannon to Sonseca | 928.85 mi (1,494.84 km) |
| Shannon to Sopelana | 699.26 mi (1,125.34 km) |
| Shannon to Soria | 813.01 mi (1,308.41 km) |
| Shannon to Suances | 678.32 mi (1,091.65 km) |
| Shannon to Sueca | 1,018.31 mi (1,638.81 km) |
