| Conwy to Sesena | 910.42 mi (1,465.18 km) |
| Conwy to Sestao | 689.83 mi (1,110.18 km) |
| Conwy to Sevilla | 1,113.09 mi (1,791.35 km) |
| Conwy to Sevilla La Nueva | 893.60 mi (1,438.11 km) |
| Conwy to Silla | 975.11 mi (1,569.29 km) |
| Conwy to Silleda | 758.46 mi (1,220.63 km) |
| Conwy to Sitges | 872.55 mi (1,404.24 km) |
| Conwy to Socuellamos | 967.62 mi (1,557.24 km) |
| Conwy to Soller | 982.92 mi (1,581.85 km) |
| Conwy to Solsona | 817.96 mi (1,316.38 km) |
| Conwy to Son Servera | 1,002.67 mi (1,613.64 km) |
| Conwy to Sonseca | 938.30 mi (1,510.05 km) |
| Conwy to Sopelana | 685.03 mi (1,102.45 km) |
| Conwy to Soria | 797.99 mi (1,284.24 km) |
| Conwy to Suances | 680.42 mi (1,095.02 km) |
